https://devzone.nordicsemi.com/f/nordic-q-a/17930/nrf51822-antennaWe have designed a custom BLE module by taking the NRF51DK as the refernece.We have also given provision for the Antenna connector and the Antenna design is same as the one on the NRF51-DK.But somehow, i am not able to detect the BLE radio.The Programen-USTelligent Community 13Fri, 25 Nov 2016 06:56:09 GMThttps://devzone.nordicsemi.com/thread/69128?ContentTypeID=1Fri, 25 Nov 2016 06:56:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c181241-1e1d-4e9e-855a-9d739b081485FormerMember<p>What is the distance from the chip to the antenna? The traces/transmission lines between the chip and the antenna should be 50 Ohm transmission lines (co-planar waveguide). To calculate the appropriate width of the antenna, <a href="http://www.hp.woodshot.com/">appCad</a> can be used.</p> <p>I would also recommend you to take a look at the <a href="https://devzone.nordicsemi.com/tutorials/25/">General PCB design guidelines for nRF51</a>, perhaps that can be useful.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/69127?ContentTypeID=1Thu, 24 Nov 2016 12:12:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61742b02-3713-4c5f-9339-188ab3bf0f4dPunit<p>Due to confidentiality constraints, i am unable to post any pictures..Can u suggest any debugging steps that i can do at my end? Also, can u suggest the antenna part number?</p> <p>Thanks in advance!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/69126?ContentTypeID=1Wed, 23 Nov 2016 12:52:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02d7405f-a3b9-4738-926a-299f67d7448fFormerMember<p>Could you show a picture/gerber files of the antenna?</p><div style="clear:both;"></div>