Open Hardware Vector Network Analyzer

I'm developing a proof of concept two port microwave vector network analyzer. The project is under developent.

Usage

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.

Hardware Design

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

Software Design

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.

License

All work is under a MIT license.

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