2 layers81.3 × 33.7 mm
SDRReciever
Dizzerin/Software-Defined-Radio
Quadrature sampling down converter software defined radio
67 parts24
4 layers46.9 × 21 mm
SI4463 module
Engineer162/LongshotLongshot is an open hardware and firmware project for designing and building a custom RF communication module.
- Size
- 46.9 × 21 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 39
- Pads
- 155
- Tracks, vias
- 204, 455
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Apr 2026
- Updated
- 5 Apr 2026
Overview
SI4463 module is an open-source printed circuit board by Engineer162, from the Engineer162/Longshot repository on GitHub. It is a 4-layer board of 46.9 × 21 mm with 45 parts on 39 nets, routed with 204 tracks and 455 vias.
It is built around the SI4463-C2A-GMR, SKY66423-11 and MMBT2222A-TP. Its parts include 18 capacitors, 12 inductors, 6 resistors, 3 connectors and 2 ICs.
Main components
3
SI4463-C2A-GMR
QFN-20-EP(4x4)-129dBm -40℃~+85℃ 1.8V~3.8V 10.9mA 142MHz~1.05GHz 1Mbps 20dBm 44.5mA ISM SPI transceiver QFN-20-EP(4x4) RF Transceiver ICs ROHSSilicon LabsRF Transceiver ICsSKY66423-11
MCM-16(3x3)-10dB -10dB -12dB -12dB -12dBm -2dBm -40℃~+85℃ 1uA 27dBm 2V~4.8V 860MHz~930MHz MCM-16(3x3) RF Front End Circuits ROHSSkyworks SolutionsRF Front End Circuits
MMBT2222A-TP
SOT-23-55℃~+150℃ 1 NPN 100 10nA 1V 300MHz 350mW 40V 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSMicro Commercial ComponentsBipolar (BJT)
README
README.mdLongshot
What This Project Is
Longshot is an open hardware and firmware project for designing and building a custom RF communication module.
This repository contains:
- EDA design files for the schematic and PCB layout
- Firmware sources for bring-up and control of the radio system
- Supporting documentation and licenses for development and release
Current version sends/recieves at 868MHz, but this can be changed in firmware, and by changing matching and lowpass filters in the schematic.
Why did i feel the need to create such a module from scratch? Because i simply wasnt satisfied by the speed & range that other modules like LoRa had, so i created my own.
RF Main Components
| Function | IC / Module |
|---|---|
| Transceiver IC | SI4463 |
| PA / LNA | SKY66423-11 |
Note: I tried to use copilot AI to generate this repo structure as i have not tried that before. Safe to say i wont be attempting that in any future repo's.
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0Ω | module-lib:RES_ERJ-2GE0R00X | R1, R2 |
| 2 | 100nF | Capacitor_SMD:C_1206_3216Metric | C16, C18 |
| 2 | 10kΩ | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric | C8, C15 |
| 2 | 11nH | Inductor_SMD:L_0201_0603Metric | L9, L10 |
| 2 | 5.6nH | Inductor_SMD:L_0402_1005Metric | L1, L2 |
| 1 | 0.6nH | Inductor_SMD:L_0201_0603Metric | L6 |
| 1 | 1.5pF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 10pF | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 120nH | Inductor_SMD:L_0603_1608Metric | L7 |
| 1 | 15nH | Inductor_SMD:L_0402_1005Metric | L8 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 1pF | Capacitor_SMD:C_0402_1005Metric | C13 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 2.2pF | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 2.4pF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 2.7nH | Inductor_SMD:L_0402_1005Metric | L4 |
| 1 | 2.7pF | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 20nH | Inductor_SMD:L_0402_1005Metric | L11 |
| 1 | 24nH | Inductor_SMD:L_0805_2012Metric | L12 |
| 1 | 3.9pF | Capacitor_SMD:C_0402_1005Metric | C10 |
| 1 | 30MHz | module-lib:XTAL_ABM8-30.000MHz-10-B1U-T | Y1 |
| 1 | 33pF | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 3pF | Capacitor_SMD:C_0402_1005Metric | C14 |
| 1 | 4.7kΩ | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 5.1pF | Capacitor_SMD:C_0402_1005Metric | C11 |
| 1 | 5.2kΩ | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 6.8nH | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | 60V 1A | module-lib:DIO_MSS1P6-M3_89A | D1 |
| 1 | 7.5nH | Inductor_SMD:L_0402_1005Metric | L5 |
| 1 | 82pF | Capacitor_SMD:C_0402_1005Metric | C7 |
| 1 | Conn_01x10_Pin | module-lib:PinHeader_1x10_P2.00mm_Vertical | J2 |
| 1 | EXT_ANT | module-lib:PinHeader_1x03_P2.00mm_Vertical | J1 |
| 1 | MMBT2222A-TP | module-lib:MTR_MMBT2222A-TP_MCE | TR1 |
| 1 | SI4463-C2A-GMR | module-lib:QFN50P400X400X90-21N | U1 |
| 1 | SKY66423-11 | module-lib:XCVR_SKY66423-11 | U2 |
| 1 | U. FL | module-lib:LINX_CONUFL001-SMD-T | J3 |
| 1 | WE-SHC_SEAMLESS | module-lib:WE-SHC_SEAMLESS_3670310 | H1 |
Questions
How big is the SI4463 module PCB?
It measures 46.9 × 21 mm and has 4 copper layers, 1.6 mm thick.
What parts does the SI4463 module use?
45 parts, built around the SI4463-C2A-GMR, SKY66423-11 and MMBT2222A-TP. 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 SI4463 module KiCad files?
From the Engineer162/Longshot repository on GitHub, at the commit this page was made from: the board is EDA/SI4463_module.kicad_pcb and its schematic EDA/SI4463_module.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SI4463 module design in my own project?
Its repository states no licence, so its author keeps all rights: ask Engineer162 before reusing the design.
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