MMIC VHF Low Noise Amplifier

VHF Low Noise Amplifier Circuit & PCB using common MMIC. This unit is capable up to 1kW at 2m-band (144 MHz) and powered by +12V supply thru a separate cable (hi-power bias tee is not implemented). MMIC input is protected by a BPF. Therefore, due to the BPF insertion loss, the input NF is not extremely good, (only 1 dB NF approx.). All the Eagle and Gerber files are included.

Schematic

PCB (photos)

• Unpopulated
• Populated. The input port is at near the lower right relay and the output port is at near the lower left relay.

BPF Response

BPF simulation file (using RFSim99) is included also. Predicted performance:

• S21 -3dB from 135.67MHz - 150.07MHz
• S21 -10dB from 131.1MHz - 154.5MHz
• S21 -0.02dB and S11 -23.86dB at 139.1MHz (WXSat band)
• S21 -0.31dB and S11 -11.59dB at 143.02MHz (BPF Center Frequency)
• S21 -0.21dB and S11 -13.17dB at 144.3MHz (EME Band)
• S21 -0.04dB and S11 -20.69dB at 145.8MHz (2m AMSAT Band)
• FM Broadcast band rejection is better than -28dB (S21) at 108MHz

Contributing

1. Fork it https://github.com/handiko/VHF-LNA/fork
2. Create new branch (git checkout -b add-blah-blah)
3. Do some editing / create new feature
4. Commit your works (git commit -m "Adding some blah blah blah..")
5. Push to the branch (git push -u origin add-blah-blah)
6. Create a new Pull Request