Antenna trasmission line width on a 4 layer pcbhttps://devzone.nordicsemi.com/f/nordic-q-a/21875/antenna-trasmission-line-width-on-a-4-layer-pcbWe are currently designing a prototype board for our product using the nRF52832. We need to calculate the transmission line with on a 4 layer PCB. The stack-up looks like this: Copper 1 35 um - Signal (with surrounding GND) Dielectric 1-2 0.175en-USTelligent Community 13Tue, 09 May 2017 12:49:24 GMTRE: Antenna trasmission line width on a 4 layer pcbhttps://devzone.nordicsemi.com/thread/85884?ContentTypeID=1Tue, 09 May 2017 12:49:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:205de8f0-42e4-46e8-b336-006bcc9025b2J&#248;rn<p>Due to how close the two dielectric constants are they shouldn&#39;t make too much of a difference. The wavelengths in the two mediums are within 4% of each other. So I think you can safely use an avarage estimate as RK suggested.</p><div style="clear:both;"></div>RE: Antenna trasmission line width on a 4 layer pcbhttps://devzone.nordicsemi.com/thread/85885?ContentTypeID=1Mon, 08 May 2017 07:14:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:521c765b-fb57-4aa1-b9a1-6ca0b80a29b9RK<ol> <li>H is the distance between top and bottom</li> <li>I don&#39;t know that - those dielectric constants aren&#39;t that different, I&#39;d probably use an average.</li> </ol><div style="clear:both;"></div>