I'm developing a proof of concept two port microwave vector network analyzer. The project is under developent.
This project is still under development, y'all probably don't want to try reproducing it yet.
Run software/vna_controller/adc_bbone_init.py and software/vna_controller/pru_test/run.sh on the Beaglebone,
then run software/vna_controller/vna_driver.py to start the VNA.
I'm still at the stage of testing individual modules (demodulators, synthesizers, filter banks, amplifiers, switches..).
See breakouts for various modules developed for the network analyzer.
Breakout boards are combined into modules..
| Module Name | Description | Status |
|---|---|---|
| hardware/frequency_synth | Frequency synthesizer with filtered harmonics and closed loop amplitude control | appears to work! |
| hardware/demod_adc | I/Q demodulator/adc | assembled, testing in progress |
All 4 layer PCBs are routed assuming OSH Park's 4 layer stackup (http://docs.oshpark.com/services/four-layer/) with FR-408 and 6.7 mil prepreg height. All layouts/schematics are created in KiCad 4
See the software directory for scraps of software written for testing VNA modules.
Possibly of interest to others is the code in synth_test.ino for using the LMX2592 synthesizer.
All work is under a MIT license.
Feel free to contact me at [email protected] or loxodes in #rhlug on irc.freenode.net