https://github.com/handiko/vhf-lna
VHF Low Noise Amplifier Circuit & PCB using common MMIC
https://github.com/handiko/vhf-lna
2m-band bpf eagle eagle-cad pcb vhf-lna
Last synced: 22 days ago
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VHF Low Noise Amplifier Circuit & PCB using common MMIC
- Host: GitHub
- URL: https://github.com/handiko/vhf-lna
- Owner: handiko
- License: gpl-3.0
- Created: 2018-12-29T14:13:57.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2020-04-28T22:13:24.000Z (almost 5 years ago)
- Last Synced: 2025-02-13T03:18:02.482Z (2 months ago)
- Topics: 2m-band, bpf, eagle, eagle-cad, pcb, vhf-lna
- Homepage: https://handiko.github.io/VHF-LNA/
- Size: 7.44 MB
- Stars: 6
- Watchers: 2
- Forks: 9
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# 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](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