Low-noise RF Preamplifier

From RF Coil Lab
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Lna picture.jpg

Overview

A low-noise amplifier for early gain stages that functions at at a range or radio frequencies. Functions using the PHA-13LN+ (see parts list at bottom).

Design

The LNA is housed inside a 0.75" X 0.5625" X 0.58" RF enclosure (see parts list at bottom). The enclosure takes SMA input and output, and requires 6+ V DC with ~75 mA of operating current. The enclosure is connected to the board and SMA GND. The current model does not have impedance matching incorporated.
Lna inside.jpg
Lna schematic pic.png

Specs

Gain

[Gain data needed]

Safety limits

[Safety data needed]

Testing

The LNA was tested on the Halbach table-top scanner (~3 MHz center frequency) as a gain stage, along with the Minicircuits ZFL-500LN+ [1]. It demonstrated similar SNR to the lab's current AU-1583 amplifiers when total gain was comparable, using different gain stages. All testing data is included below.
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Files

KiCAD file:
Media:lna_kicad.zip
Testing data:
Media:lna_parts.txt