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.
This project is still under development, y'all probably don't want to try reproducing it yet. Testing with two port measurements out to 13 GHz is in progress.
See breakouts and hardware for various modules developed for the network analyzer.
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.
All work is under a MIT license.
Feel free to contact me at arcticmicrowave@gmail.com or loxodes in #rhlug on irc.freenode.net