4 layers66.5 × 93.5 mm
4 layers36.8 × 24.1 mm
Attenuator
loxodes/vna205Under development open hardware microwave vector network analyzer
- Size
- 36.8 × 24.1 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 33
- Pads
- 118
- Tracks, vias
- 232, 41
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 22 Apr 2016
- Updated
- 31 Dec 2023
Overview
Attenuator is an open-source printed circuit board by loxodes, from the loxodes/vna repository on GitHub. It is a 4-layer board of 36.8 × 24.1 mm with 37 parts on 33 nets, routed with 232 tracks and 41 vias.
It is built around the HMC424A and 74HC04D. Its parts include 12 capacitors, 12 resistors, 6 ICs, 6 diodes and 1 connector. It belongs with the radio and wireless and sensors and measurement boards of this library.
Main components
2README
README.mdOpen Hardware Vector Network Analyzer
I'm developing a proof of concept two port microwave vector network analyzer. The project is under developent. Ongoing documentation and logs are located on a hackaday.io project page.
Usage
This project is still under development, y'all probably don't want to try reproducing it yet. Two port measurements to 14 GHz work, a redesign for operation out to 36 GHz is in progress.
Hardware Design
See breakouts and hardware for various modules developed for the network analyzer.
Software Design
See the software directory for scraps of software written for testing VNA modules.
License
Unless otherwise noted, all work is under a MIT license.
Contact
Feel free to contact me at arcticmicrowave@gmail.com or loxodes on irc.freenode.net
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100 | Resistors_SMD:R_0402 | R4, R5, R6, R7, R8, R9 |
| 6 | 10k | Resistors_SMD:R_0402 | R1, R2, R3, R10, R11, R12 |
| 6 | ZENER | Diodes_SMD:SOD-123 | D1, D2, D3, D4, D5, D6 |
| 4 | 100 nF | Capacitors_SMD:C_0402 | C2, C6, C8, C10 |
| 4 | 30 pF | Capacitors_SMD:C_0402 | C1, C7, C9, C11 |
| 2 | 10 uF | Capacitors_SMD:C_0805 | C3, C4 |
| 2 | CONN_SMA | vna_footprints:732512200_SMA | U1, U4 |
| 1 | 74HC04 | Housings_SSOP:TSSOP-14_4.4x5mm_Pitch0.65mm | U5 |
| 1 | CONN_01X08 | Pin_Headers:Pin_Header_Straight_1x08 | P1 |
| 1 | C_Small | Capacitors_SMD:C_0805 | C5 |
| 1 | C_Small | Capacitors_SMD:C_0402 | C12 |
| 1 | HMC424 | Housings_DFN_QFN:QFN-16-1EP_3x3mm_Pitch0.5mm | U3 |
| 1 | LTC1983 | TO_SOT_Packages_SMD:SOT-23-6 | U2 |
| 1 | mounting_box | vna_footprints:POMONA_2400BOX | U6 |
Questions
How big is the Attenuator PCB?
It measures 36.8 × 24.1 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Attenuator use?
37 parts, built around the HMC424A and 74HC04D. 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 Attenuator KiCad files?
From the loxodes/vna repository on GitHub, at the commit this page was made from: the board is breakouts/attenuator/attenuator.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Attenuator design in my own project?
Its repository states no licence, so its author keeps all rights: ask loxodes before reusing the design.
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