https://test-devzone.nordicsemi.com/f/nordic-q-a/87966/nrf52840-and-nrf21540-schematicsHej! Do you have a reference design for nRF52840 and nRF21540, how to connect the ANT signal (nRF52840) to TRX (nRF21540)? Is it enough to only use a DC block, C1=1.0pF, as Nordic present in the reference design for nRF21540? Same question goesen-USTelligent Community 13 Non-ProductionMon, 16 May 2022 18:18:36 GMThttps://test-devzone.nordicsemi.com/thread/368110?ContentTypeID=1Mon, 16 May 2022 18:18:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b675529c-c6c7-4ae7-998f-cacfa80baabeuser91187<p>Hi,<br /><br />You can download the files from our webpage:&nbsp;<a href="https://www.nordicsemi.com/Products/Development-hardware/nRF21540-DB/Download?lang=en#infotabs">nRF21540 DB - Downloads - nordicsemi.com<br /><br /><br /></a></p> [quote user=""]Is it enough to only use a DC block, C1=1.0pF, as Nordic present in the reference design for nRF21540?[/quote] <p>A single DC blocking cap is all that is required if the transmission line is matched.&nbsp;<br /><br /><br /><br /></p> [quote user=""]Same question goes to the ANT1 matching network to the antenna, L1, L2, C2, C3, will this matching network be sufficient?[/quote] <p>We still recommend that you add a separate matching network for the antenna of your choice.<br /><br />Regards,<br />Jonathan</p><div style="clear:both;"></div>