https://devzone.nordicsemi.com/f/nordic-q-a/19585/whitepaper-vs-appcad-values-monopole-antennaI&#39;m finding a discrepancy with numbers between the nwp_008 whitepaper (quarterwave printed monopole antenna for 2.45ghz) and AppCad values. I&#39;ve assumed you can measure that as a microstrip. Maybe that&#39;s wrong? Screenshot shows the values entered anden-USTelligent Community 13Thu, 09 Feb 2017 11:13:26 GMThttps://devzone.nordicsemi.com/thread/76216?ContentTypeID=1Thu, 09 Feb 2017 11:13:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dbdc44cf-bc61-45b0-ad2c-10c3afd412b1Joe Wright<p>Thanks, will follow your reference designs.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/76215?ContentTypeID=1Thu, 09 Feb 2017 09:44:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14f357c7-3447-4307-8813-40f187f9ede9FormerMember<p>A microstrip line is a waveguide, meaning that it is used to transport signals to the antenna. A microstrip line is a &quot;signal line&quot; with ground below it. A monopole antenna is &quot;signal line&quot; with no ground below. Therefore, I don&#39;t think it will work to use microstrip calculations to estimate the impedance of the antenna.</p> <p>For antenna design, I would recommend you to follow the whitepaper nwp_008. The antennas on our development kits follow the recommendations from the whitepaper.</p><div style="clear:both;"></div>