4 layers41 × 41 mm
Rf amplifier modulino
OpenAir-Lab/capstone-project
ECE 438X Senior Design Capstone Project
57 parts3MIT
4 layers40 × 20 mm
LinHT rf amp
M17-Project/LinHT-rf-amp14Test board for the Guerrilla RF GRF5604 RF amplifier integrated circuit
- Size
- 40 × 20 mm
- Copper layers
- 4
- Thickness
- 0.98 mm
- Parts
- 27
- Nets
- 15
- Pads
- 95
- Tracks, vias
- 44, 109
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Aug 2025
- Updated
- 29 May 2026
Overview
LinHT rf amp is an open-source printed circuit board by M17-Project, from the M17-Project/LinHT-rf-amp repository on GitHub. It is a 4-layer board of 40 × 20 mm with 27 parts on 15 nets, routed with 44 tracks and 109 vias.
It is built around the GRF5604 and LFCN-490. Its parts include 12 capacitors, 4 inductors, 3 resistors, 3 connectors and 1 IC. It belongs with the audio and music and radio and wireless boards of this library.
Main components
2README
README.md
LinHT-rf-amp
Standalone RF power amplifier module for the LinHT handheld, built around the Guerrilla RF GRF5604.
This repository houses a proof-of-concept (PoC) board used to evaluate matching, biasing, efficiency, and linearity in the 420–450 MHz band. Results from this effort will feed back into, and eventually be integrated with the
main LinHT hardware project.
Goal: validate a practical PA chain for LinHT. Once the approach is proven, the PA will be integrated into LinHT to enable higher output power (targeting ≈ 5 W at the radio level). This board is for laboratory development and characterization.
Status
- Design tested - works.
- Tuning follows the vendor's reference design for 397–470 MHz
Safety & Compliance
This hardware is intended for licensed amateur radio experimentation. Users are responsible for ensuring compliance with local regulations (spectral masks, occupied bandwidth, power limits, spurious emissions) before on-air use.
License
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4 |
| 2 | 33p | Capacitor_SMD:C_0402_1005Metric | C7, C9 |
| 2 | MountingHole_Pad_MP | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 100p | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | 10n | Inductor_SMD:L_0402_1005Metric | L4 |
| 1 | 10p | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 1k96 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 2.4nH | Inductor_SMD:L_0603_1608Metric | L3 |
| 1 | 20nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 23nH | Parts:0908SQ-23N | L2 |
| 1 | 27p | Capacitor_SMD:C_0402_1005Metric | C11 |
| 1 | 3p | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 6k04 | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 6p8 | Capacitor_SMD:C_0402_1005Metric | C10 |
| 1 | GRF5604 | Parts:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm_ThermalVias | U1 |
| 1 | INPUT | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J2 |
| 1 | LFCN-490 | Filter:Filter_Mini-Circuits_FV1206 | FL1 |
| 1 | OUTPUT | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J3 |
| 1 | SIGNALS | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
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Questions
How big is the LinHT rf amp PCB?
It measures 40 × 20 mm and has 4 copper layers, 0.98 mm thick.
What parts does the LinHT rf amp use?
27 parts, built around the GRF5604 and LFCN-490. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the LinHT rf amp KiCad files?
From the M17-Project/LinHT-rf-amp repository on GitHub, at the commit this page was made from: the board is LinHT-rf-amp.kicad_pcb and its schematic LinHT-rf-amp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LinHT rf amp design in my own project?
Its repository states no licence, so its author keeps all rights: ask M17-Project before reusing the design.