https://devzone.nordicsemi.com/f/nordic-q-a/30983/does-nrf51-dk-for-use-with-external-antenna-require-board-modificationsDo i need to cut the trace of the onboard antenna for this to work properly? ie. not cause an impedance mismatch or compete with the onboard antenna.en-USTelligent Community 13Thu, 01 Mar 2018 18:12:08 GMThttps://devzone.nordicsemi.com/thread/122511?ContentTypeID=1Thu, 01 Mar 2018 18:12:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:70e4ffe4-d380-4f01-bb8b-9d2ee451b478mkroeze<p>Thanks for you reply. <br />I see now that this is a&nbsp;<span>MM8130-2600 connector that is used for power measurement testing, NOT an external antenna.</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/122504?ContentTypeID=1Thu, 01 Mar 2018 17:44:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ccc868d-cbb5-430f-88a6-ad9f1ed7cf3bmkroeze<p>the question is not in regard to replicating the antenna on a different PCB....</p> <p>Please let me attempt to clarify my question.</p> <p><br />In order to use an EXTERNAL 2.4g whip antenna utilizing the mmcx connection on the nRF51-dk board, does the integrated PCB board trace antenna require cutting to use the external antenna via the on-board mmcx connector or is there a way to switch the nRF51422 antenna path to the external mmcx connector in code?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/122385?ContentTypeID=1Thu, 01 Mar 2018 07:06:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81153c81-ce5a-4f90-907a-45bf7c632b55Andreas<p>Hi,</p> <p>&nbsp;</p> <p>The nRF51-DK antenna is tuned for the nRF51-DK PCB. If you replicate it in a different PCB, the size, shape and layout will possibly require it to be tuned a little differently&nbsp;so it is always good practice to check it. It should still work to some degree, just not optimally.</p> <p></p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>