https://rflab.martinos.org/api.php?action=feedcontributions&user=Jaystock&feedformat=atomRF Coil Lab - User contributions [en]2024-03-29T15:21:04ZUser contributionsMediaWiki 1.35.1https://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=778Spin echo generator board (in progress)2024-03-26T03:00:30Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB schematic and layout here:<br />
<br />
https://rflab.martinos.org/images/7/76/Spin_echo_board_v8.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse for 90 and 180 deg pulses (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and TR.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Top of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=775Spin echo generator board (in progress)2024-03-26T03:00:11Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/7/76/Spin_echo_board_v8.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse for 90 and 180 deg pulses (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and TR.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Top of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=772Spin echo generator board (in progress)2024-03-26T02:59:38Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board_v8.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse for 90 and 180 deg pulses (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and TR.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Top of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Spin_echo_board_v8.zip&diff=769File:Spin echo board v8.zip2024-03-26T02:59:11Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=766Spin echo generator board (in progress)2024-03-26T02:52:55Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse for 90 and 180 deg pulses (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and TR.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Top of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=763Spin echo generator board (in progress)2024-03-26T02:49:50Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and other delays.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Top of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=760Spin echo generator board (in progress)2024-03-26T02:48:06Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and other delays.<br />
<br />
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Bottom of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Top of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=757Spin echo generator board (in progress)2024-03-26T02:47:01Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation pulse, and other delays.<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Bottom of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Top of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Spin_echo_board_top.JPG&diff=754File:Spin echo board top.JPG2024-03-26T02:44:32Z<p>Jaystock: Jaystock uploaded a new version of File:Spin echo board top.JPG</p>
<hr />
<div>== Summary ==<br />
spin echo board top</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=751Spin echo generator board (in progress)2024-03-26T02:43:15Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Bottom of PCB with digital IC's.]]<br />
<br />
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Top of PCB with RF components and potentiometers to set pulse duration and duty cycle.]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=748Spin echo generator board (in progress)2024-03-26T02:42:40Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
[[File:Spin_echo_board_bottom.JPG|200px|thumb|left|Bottom of PCB]]<br />
<br />
[[File:Spin_echo_board_top.JPG|200px|thumb|left|Top of PCB]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=745Spin echo generator board (in progress)2024-03-26T02:41:59Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
[[File:spin_echo_board_bottom.jpg|200px|thumb|left|Bottom of PCB]]<br />
<br />
[[File:Spin_echo_board_top.JPG|200px|thumb|left|Bottom of PCB]]<br />
<br />
<br />
[[File:https://rflab.martinos.org/index.php?title=File:Spin_echo_board_top.JPG|200px]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=742Spin echo generator board (in progress)2024-03-26T02:37:47Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip<br />
<br />
[[File:spin_echo_board_bottom.jpg|200px|thumb|left|Bottom of PCB]]<br />
<br />
[[File:spin_echo_board_top.jpg|200px|thumb|left|Bottom of PCB]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Spin_echo_board_bottom.JPG&diff=739File:Spin echo board bottom.JPG2024-03-26T02:36:49Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Spin_echo_board_top.JPG&diff=736File:Spin echo board top.JPG2024-03-26T02:36:19Z<p>Jaystock: spin echo board top</p>
<hr />
<div>== Summary ==<br />
spin echo board top</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=731Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T19:09:41Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout). There is an optional low-power first gain stage that can be bypassed with a jumper wire if it is not needed. The MHW592 power stage provides 35dB of gain with a 1dB compression point of 900mW.<br />
<br />
The datasheet calls for 24V, but we have gotten away with running the MHW592 at 18V for convenience (with 24V power supply provided to the on-board regulator).<br />
<br />
Datasheet for MHW592: https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|1000px|none|alt=Alt text|Schematic for MHW592 daughter board]]<br />
<br />
<br />
<br />
[[file:Layout_rfpa.png|1000px |Board layout for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=728Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T19:08:42Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout). There is an optional low-power first gain stage that can be bypassed with a jumper wire if it is not needed. The MHW592 power stage provides 35dB of gain with a 1dB compression point of 900mW.<br />
<br />
<br />
Datasheet for MHW592: https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|1000px|none|alt=Alt text|Schematic for MHW592 daughter board]]<br />
<br />
<br />
<br />
[[file:Layout_rfpa.png|1000px |Board layout for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=725Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:38:45Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout). There is an optional low-power first gain stage that can be bypassed with a jumper wire if it is not needed.<br />
<br />
<br />
Datasheet for MHW592: https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
The MHW592 provides 35dB of gain with a 1dB compression point of 900mW.<br />
<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|1000px|none|alt=Alt text|Schematic for MHW592 daughter board]]<br />
<br />
<br />
<br />
[[file:Layout_rfpa.png|1000px |Board layout for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=722Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:31:17Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).<br />
<br />
<br />
Datasheet for MHW592:<br />
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|1000px|none|alt=Alt text|Schematic for MHW592 daughter board]]<br />
<br />
<br />
<br />
[[file:Layout_rfpa.png|1000px |Board layout for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Layout_rfpa.png&diff=719File:Layout rfpa.png2022-05-19T18:29:53Z<p>Jaystock: Jaystock uploaded a new version of File:Layout rfpa.png</p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=716Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:28:36Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).<br />
<br />
<br />
Datasheet for MHW592:<br />
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|1000px |Schematic for MHW592 daughter board]]<br />
[[file:Layout_rfpa.png|1000px |Board layout for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Layout_rfpa.png&diff=713File:Layout rfpa.png2022-05-19T18:28:19Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=710Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:27:53Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).<br />
<br />
<br />
Datasheet for MHW592:<br />
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|200px |Schematic for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=707Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:27:35Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).<br />
<br />
<br />
Datasheet for MHW592:<br />
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png|200px Schematic for MHW592 daughter board]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=Low-cost_1_Watt_RF_power_amplifier_(in_progress)&diff=704Low-cost 1 Watt RF power amplifier (in progress)2022-05-19T18:26:29Z<p>Jaystock: </p>
<hr />
<div><br />
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).<br />
<br />
<br />
Datasheet for MHW592:<br />
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1<br />
<br />
[https://rflab.martinos.org/images/6/6b/Tabletop_RFPA_motorola.zip Click here] to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.<br />
<br />
<br />
[[file:Schematic_rfpa.png]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Schematic_rfpa.png&diff=701File:Schematic rfpa.png2022-05-19T18:25:34Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=Spin_echo_generator_board_(in_progress)&diff=698Spin echo generator board (in progress)2022-05-11T03:45:15Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
PCB layout here:<br />
<br />
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Spin_echo_board.zip&diff=695File:Spin echo board.zip2022-05-11T03:44:55Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=692LT-SPICE simulations of RF receive coil element tuning and matching2022-04-26T15:19:48Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
Here is a good reference paper that explains how to choose network topologies and calculate component values for simultaneously (i) matching the coil to 50 ohms and (ii) transforming the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995] <br />
<br />
<br />
<br />
Version of LT-SPICE simulation used for ENC April 2022 demo: https://rflab.martinos.org/images/e/ed/Coil_tuning_demo.zip<br />
<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Coil_tuning_demo.zip&diff=689File:Coil tuning demo.zip2022-04-26T15:18:30Z<p>Jaystock: </p>
<hr />
<div></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=685LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:15:51Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
Here is a good reference paper that explains how to choose network topologies and calculate component values for simultaneously (i) matching the coil to 50 ohms and (ii) transforming the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995] <br />
<br />
<br />
<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=682LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:15:30Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper that explains how to choose network topologies and calculate component values for simultaneously (i) matching the coil to 50 ohms and (ii) transforming the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995] <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=679LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:14:19Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995] <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=676LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:14:11Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[ttps://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995] <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=673LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:13:48Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): <br />
[http://www.example.org/ link text]<br />
<br />
[https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995]. <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=670LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:13:06Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): [ https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995 ]. <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=667LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:12:45Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): [[ https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 Reykowski A., et al., MRM 1995 ]]. <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=664LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:11:31Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): [[ https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617 | Reykowski A., et al., MRM 1995 ]]. <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
LT-SPICE model was created by Lincoln Craven-Brightman in 2021.<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=661LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:10:55Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
Here is a good reference paper for creating networks that simultaneously match the coil to 50 ohms and also transform the preamp impedance to a high impedance at the coil drive point ("preamp decoupling"): [[Reykowski A., et al., MRM 1995 | https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.1910330617]]. <br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=658LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T01:09:11Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. This model uses a "dummy double probe" with two inductive ports that are lightly coupled to the coil loop allowing for a two-port S21 measurement of the coil resonance. By modifying the model to remove the preamp, you can also look at the open-circuit resonance. The second model assess the impedance match looking toward the coil from the preamp. <br />
<br />
The component values can be set using variables to update both coil models simultaneously. The model includes a plot file that should automatically show S21 with the PIN diode ON, S21 with PIN diode off (just change the frequency axis as needed). <br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=655LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T00:46:52Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. The second model assess the impedance match looking toward the coil from the preamp. The component values can be set using variables to update both coil models simultaneously.<br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is specified by "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=652LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T00:46:12Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab. There are two coil models. The first is used to assess preamp decoupling and PIN diode detuning performance. The second model assess the impedance match looking toward the coil from the preamp.<br />
<br />
How to set up a basic coil model:<br />
<br />
* Coil loop inductance is set as "L1". Adjust tuning and matching capacitor values (or add more matching elements as needed).<br />
<br />
* Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
* Set the desired length of cable (and cable impedance)<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=649LT-SPICE simulations of RF receive coil element tuning and matching2022-02-25T00:29:26Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab.<br />
<br />
How to set up a basic coil model:<br />
<br />
- Coil loop inductance is set as "L1"<br />
<br />
- Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=646LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T23:02:21Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab.<br />
<br />
Coil loop inductance is set as "L1"<br />
<br />
Specify the input impedance of the preamp using "Rpreamp and Lpreamp". <br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=643LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T23:01:20Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
We have developed a simple LT-SPICE model for simulating MRI RF receive element tuning and matching circuits to pick component values before tuning up a test loop in the lab.<br />
<br />
Coil loop inductance is set as "L1"<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1500px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=640LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T22:59:50Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|1200px]]<br /></div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=637LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T22:58:31Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
<br />
<br />
[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|Type|Border|Location|Alignment|100|link=Link|alt=Alt|Caption]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=634LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T22:58:25Z<p>Jaystock: </p>
<hr />
<div><br />
<br />
<br />
<br />
<br />
Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
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[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|Type|Border|Location|Alignment|200|link=Link|alt=Alt|Caption]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=LT-SPICE_simulations_of_RF_receive_coil_element_tuning_and_matching&diff=631LT-SPICE simulations of RF receive coil element tuning and matching2022-02-24T22:58:03Z<p>Jaystock: </p>
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Click here to download LT-SPICE model: https://rflab.martinos.org/images/5/5d/Siemens_example_spice.zip<br />
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[[File:Screen Shot 2022-02-24 at 5.56.15 PM.png|Type|Border|Location|Alignment|Size|link=Link|alt=Alt|page=Page|lang=Langtag|Caption]]</div>Jaystockhttps://rflab.martinos.org/index.php?title=File:Screen_Shot_2022-02-24_at_5.56.15_PM.png&diff=628File:Screen Shot 2022-02-24 at 5.56.15 PM.png2022-02-24T22:56:41Z<p>Jaystock: </p>
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<div></div>Jaystock