I found something interesting on the internet from Fox Delta. They have an antenna analyzer kit or already built.I ordered one of these.
http://www.foxdelta.com/products/aaz-0217.htm
From their site:
AAZ-0217MX is a simple single board USB Antenna Analyzer using Si5351 signal source generator chip and a return loss bridge, for measurement by a Log Amplifier AD8307 and a reference.
I will do a review on this when I get it
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