019 Inverted-F PCB Antenna: How to tune PCB circuits using a NanoVNA

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The things presented on this channel are mainly for licensed HAM radio operators (https://en.wikipedia.org/wiki/Amateur_radio). Please respect the laws of your country before you start a project that will emit radio frequencies. Otherwise, you will be punished. The first videos are HAM-related videos cross-posted from my main channel (https://www.youtube.com/c/AndreasSpiess/ )