nRF52840 co-planar waveguide, PCB 50 Ohm transmission line - Quandaryhttps://devzone.nordicsemi.com/f/nordic-q-a/70571/nrf52840-co-planar-waveguide-pcb-50-ohm-transmission-line---quandaryI’m obviously missing something from the information I’ve gathered with respect to designing a co-planar waveguide, PCB 50 Ohm transmission line. The calculations I get differ greatly from that of what I measure reviewing Nordic provided Gerber filesen-USTelligent Community 13Mon, 18 Jan 2021 06:21:29 GMTRE: nRF52840 co-planar waveguide, PCB 50 Ohm transmission line - Quandaryhttps://devzone.nordicsemi.com/thread/289611?ContentTypeID=1Mon, 18 Jan 2021 06:21:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e552474a-ad37-4975-be3f-a1504658d57fPeterInStillwater<p>Got it!&nbsp; &nbsp; &nbsp;Question Answered Here:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/69240/regarding-pcb-antenna-design">https://devzone.nordicsemi.com/f/nordic-q-a/69240/regarding-pcb-antenna-design</a></p> <p></p> <p><span>A PCB with a minimum of two layers, including a ground plane, is recommended for optimal RF performance. On PCBs with more than two layers, put a <span style="background-color:#ffff00;">keep-out area on the inner layers directly below the antenna matching circuitry</span> (components between device pin ANT and the antenna) to reduce the stray capacitances that influence RF performance.</span></p><div style="clear:both;"></div>