https://devzone.nordicsemi.com/f/nordic-q-a/16058/nrf52832dk-bluetooth-antenna-radiation-patternHi, May I please know the approximate radiation pattern for the antenna used in nRF52832DK?en-USTelligent Community 13Fri, 02 Sep 2016 05:34:22 GMThttps://devzone.nordicsemi.com/thread/61245?ContentTypeID=1Fri, 02 Sep 2016 05:34:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:434fbeeb-1bcf-4b1d-bb44-ee6c08522a72sarang<p>Anyways, thank you for the help. Shall let the other community members know if I get any help.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/61243?ContentTypeID=1Wed, 31 Aug 2016 06:04:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2f8b0629-ab5f-4f8a-acb1-e5f802ce212cEinar Thorsrud<p>Unfortunately, I do not have experience with any antenna simulation tools. Perhaps someone else on this forum has, and can make some suggestions?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/61244?ContentTypeID=1Tue, 30 Aug 2016 14:43:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f939ed8d-566b-43f3-91f1-7a6c867ed5b5sarang<p>By free tool, I mean the free simulation software that can show me the effect of dielectric, length of the antenna on the radiation pattern, directivity, gain.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/61241?ContentTypeID=1Tue, 30 Aug 2016 13:40:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d6519319-e792-4ffa-b1e3-192c35f19120Einar Thorsrud<p>A change in the dielectric constant influences the resonant frequency. For example, a lower dielectric constant would result in a shorter antenna, and vice versa, requiring it to be tuned. (The printed quarter wavelength monopole antenna can be tuned simply by slight changes in length.)</p> <p>Which free tool are you referring to?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/61242?ContentTypeID=1Tue, 30 Aug 2016 13:17:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:083839c8-1285-4bde-a0a6-c7f7851d052csarang<p>Hi Einar, May I get the free tool that can simulate the distance, gain? What could be the effect of dielectric constant of multilayer PCB on the antenna parameters?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/61240?ContentTypeID=1Tue, 30 Aug 2016 08:41:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81d36347-56c0-448a-a1db-3de2c072449aEinar Thorsrud<p>The nRF52 DK has s a λ/4 monopole antenna, so from <em>theory</em> you should expect a single doughnut shaped lobe, with field strength declining monotonically from a maximum in the horizontal direction, similar to the illustration used in <a href="http://www.antenna-theory.com/antennas/monopole.php">this article</a>. I suspect that the <em>actual</em> radiation pattern of the DK antenna deviates significantly from the ideal case, but unfortunately we do not have actual measurements of the radiation pattern of the DK specifically.</p> <p>If you are interested in more details, you may find the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.whitepapers/dita/whitepapers/pdflinks/nwp_008.html?cp=11_12">λ/4 printed monopole antenna for 2.45 GHz white paper</a> interesting.</p><div style="clear:both;"></div>