Front end
About the Front end PCB
Front end is an open source PCB design by lwa-project, published on GitHub. It is a 2-layer board measuring 114.3 × 114.3 mm, with 62 components from 34 distinct parts.
Other key parts include the GALI-74+, LM2937IMP-12/NOPB, GALI-6+ and TVS2201DRBR. By type, the board carries 19 capacitors, 11 inductors, 7 resistors, 5 ICs, 5 diodes and 2 jumpers.
From the project
KiCAD files for the LWA front end electronics
LWA Front End Electronics (FEE) v2 ==================================
Description ----------- This directory contains the KiCAD v7 project files needed to build version 2 of the LWA Front End Electronics board. Inside "LWA Balun 2020" is the full KiCAD v7 project, the Gerber files, and BoM for the board, relevant data sheets for the parts used, and an image of the rendered 3D model of the full board.
Main components on the Front end
Front end bill of materials (BOM)
62 components, 34 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | GALI-74+ | MCL_Gali | U1, U2 |
| 1 | LM2937IMP-12/NOPB LM2937IMP-12 | SOT-223-3_TabPin2 | U3 |
| 1 | GALI-6+ | MCL_Gali | U4 |
| 1 | TVS2201DRBR TVS2201 | Texas_DRB0008A_VSON-N8_No_Vias | U5 |
| 1 | PAT1220-C-3DB-T5 PAT1220-C-3DB | RF_Attenuator_Susumu_PAT1220_3D | ATT1 |
| 4 | DNI 1/4-20 FREE-FIT | Feedpoint | FP1, FP2, FP3, FP4 |
| 1 | PCB Layer Stackup Detail | FabDrawing-2Layer-Imperial_LWA | G1 |
| 1 | 2035-09-SM-RPLF | 2035-09-SM-RPLF | GDT1 |
| 1 | AMT-32+ | AMT-2 | H1 |
| 2 | S1621-46R JS1621-46R | S1621-46R | JP1, JP2 |
| 2 | GND_Bolt | GND_Bolt | MH1, MH2 |
| 1 | 142-0701-201 RF OUT+DC IN | SMA_142-0701-201 | S3 |
| 1 | S1751-46R +V TEST | Harwin_TP_S1751-46R | TP1 |
| 1 | S1751-46R GND TEST | Harwin_TP_S1751-46R | TP2 |
| 1 | SK24 | D_SMB_Handsoldering | D1 |
| 3 | BAV99LT1G | SOT-23 | D2, D3, D4 |
| 1 | APT3216LZGCK Green | LED_1206_3216Metric | D8 |
| 3 | HZ0805C202R-10 | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1, FB2, FB3 |
| 3 | 1008CS-472XJLC 4.7 uH | 1008CS | L1, L2, L4 |
| 1 | 1008PS-472KLB 4.7 uH | 1008PS | L3 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1008CS-101XGLC 100 nH | 1008CS | L5 |
| 2 | 1008CS-330XGLC 33 nH | 1008CS | L6, L7 |
| 1 | RMCF0603ZT0R00 OPT | 1008CS_RES | L8 |
| 2 | CL32B106KBJNNWE 10 uF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1, C18 |
| 10 | CC1206KKX7RYBB104 0.1 uF | C_1206_3216Metric_Pad1.6x1.8mm | C2, C3, C5, C6, C8, C9, C12, C13 +2 |
| 3 | C1206C102KBRACTU 1000 pF | C_1206_3216Metric_Pad1.6x1.8mm | C4, C7, C11 |
| 2 | 06031A330GAT2A 33 pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C14, C17 |
| 1 | GRM32ER71E226ME15K 22 uF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C16 |
| 1 | DNI OPT | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C20 |
| 2 | 352191RFT 91R | R_2512_6332Metric_Pad1.8x3.35mm | R1, R2 |
| 1 | RMCF1206FT51R0 51R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 2 | ERJ-8GEYJ472V 4.7k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4, R5 |
| 1 | RMCF2512FT95R3 95.3R | R_2512_6332Metric_Pad1.8x3.35mm | R6 |
| 1 | Virtual 20 mOhm | ESR_20_mOhm | R7 |
Front end design files
The KiCad project lives in the lwa-project/front_end repository on GitHub; these links point at the commit this page was built from.
Front end: common questions
How big is the Front end PCB?
The Front end measures 114.3 × 114.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Front end?
62 components, from 34 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Front end design files?
From the lwa-project/front_end repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Front end design in my own project?
The repository has no license, so all rights stay with lwa-project. Use it as a reference, and ask the author before reusing the design.