Nano VNA antenna antenna tester: first look

Banggood sent me this Nano VNA to check out. A VNA is a "vector network analyzer" used to test, measure, calibrate and diagnose antenna systems. It's useful piece of test equipment for any radio hobbyist to have. And this one is definitely hobbyist priced (as opposed to the multi 10s of thousands of dollar professional units I have used in the past) NanoVNA-PCB 10KHz-1.5GHz Digital Network Analyzer -- https://ban.ggood.vip/1n4Dp Coupons: BG1b2c94 for UK AU; BGe37098 for CA ; BG089640 for US Banggood Hobby Day -- https://ban.ggood.vip/1n8j5 Measurement tools Sale -- https://ban.ggood.vip/1n8j6 For manuals and more information., check out the NanoVNA official site: https://nanovna.com/ And because this is an open source project, the schematic is available: https://github.com/ttrftech/NanoVNA/blob/master/doc/nanovna-sch.pdf As is the firmware: https://github.com/hugen79/NanoVNA-H Everything you ever wanted to know about Smith Charts: https://en.wikipedia.org/wiki/Smith_chart