https://devzone.nordicsemi.com/f/nordic-q-a/23892/is-there-a-known-rf-immunity-problem-at-2-3ghzWe recently did pre-compliance RF radiated immunity testing at a certified lab. The EUT was nRF52832 on a battery powered post card sized circuit board with some sensors. We lost bluetooth connection at 2.3GHz+-.01GHz with a field strength of 3V/m. Theen-USTelligent Community 13Tue, 01 Aug 2017 07:41:19 GMThttps://devzone.nordicsemi.com/thread/94003?ContentTypeID=1Tue, 01 Aug 2017 07:41:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4612c146-450c-45da-9e6c-7d559b3b8994Andreas<p>Hi</p> <p>There is not a known RF immunity problem, I suspect that the reason your board is failing the test is the layout. The matching network is not laid out as in our <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/ref_circuitry.html?cp=2_1_0_52_7#layout">reference design</a>. The impedance matching is therefore most likely off.</p> <p>Also the antenna does not seem to be tuned, which can make problems worse. I still would not mind having a look at the rest of the board also - feel free to make a case in <a href="https://www.nordicsemi.com/eng/nordic/mypage">Mypage</a> if do not want to share the rest of your board publicly.</p> <p>Best regards, Andreas</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/94002?ContentTypeID=1Mon, 31 Jul 2017 13:18:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5069058-02aa-4dc5-99cc-ca2ea3f4c68aovrebekk<p>Hi</p> <p>Did you follow the reference layout when designing the RF circuitry?</p> <p>If you attach the layout we can have a look at it, and see if it looks fine.</p> <p>Best regards<br /> Torbjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/94001?ContentTypeID=1Fri, 28 Jul 2017 17:45:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4a04fe94-6510-4ba3-8a5c-982d2ded2092Turbo J<p>Have a look at the antenna and its feed.</p><div style="clear:both;"></div>