{"id":459926,"date":"2026-06-17T11:25:32","date_gmt":"2026-06-17T11:25:32","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-measured-values-in-hfss-for-glass-substrate-spiral-embedded-inductor\/"},"modified":"2026-06-17T11:25:32","modified_gmt":"2026-06-17T11:25:32","slug":"simulating-measured-values-in-hfss-for-glass-substrate-spiral-embedded-inductor","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-measured-values-in-hfss-for-glass-substrate-spiral-embedded-inductor\/","title":{"rendered":"Simulating measured values in HFSS for Glass substrate spiral embedded inductor"},"content":{"rendered":"<p>&lt;p&gt;Greetings,&lt;br&gt;I am simulating the inductance for a 2.5 circular spiral inductor fabricated on a glass-substrate fabricated in my lab.&lt;br&gt;The dimensions are in millimeters, and the inductance measurement was done using a Keysight E4980A LCR Meter.&lt;br&gt;&lt;br&gt;A screenshot of the design is attached.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/www.edaboard.com\/attachments\/1781692944859-png.204903\/\" alt=\"1781692944859.pngPmeshB &middot; Jun 17, 2026 at 4:12 PM\" \/>&lt;\/p&gt;&lt;p&gt;I have checked that the model matches with the fabricated piece. Although, the fabricated piece does not have a ground ring. But in my previous simulation to validate my simulation environment, I was able to replicate an existent paper&#8217;s Inductance and Q Factor values using the Y parameters (although it used VNA measurements instead of LCR meter measurements and the fabrication included a ground ring).&lt;br&gt;I used the formulae: L = im(1\/Y11)\/(2*pi*freq) and Q = -im(Y11)\/re(Y11). There is also a region defined for the airbox.&lt;br&gt;&lt;br&gt;When I simulate this setup,&nbsp;<strong>I am getting an inductance of around 60 nH at 300 KHz of frequency<\/strong>. However, the measured value is 360 nH at 300 KHz.&lt;br&gt;&lt;br&gt;I am getting similar inductance values (~60 nH) when simulating the same using ANSYS Maxwell and Q3D. Another issue of concern is that the measured DC resistance is 1 ohm, whereas the Q3D simulation is around 0.6 ohms.&lt;br&gt;&lt;br&gt;1. Will VNA and LCR meter measurements require different excitations in HFSS? My previous validated simulation was from a VNA measurement unlike this one which uses an LCR meter.&lt;br&gt;&lt;br&gt;2. If there is no ground ring in the fabricated piece, is this ground ring approach still correct to get the measured values?&lt;br&gt;&lt;br&gt;3. Is there anything in particular that could be causing such a drastic difference between simulated and measured values?&lt;br&gt;&lt;br&gt;Thank you for your time and consideration!&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-459926","topic","type-topic","status-publish","hentry","topic-tag-ansys-hfss","topic-tag-inductance","topic-tag-inductor-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27793"],"_bbp_topic_id":["459926"],"_bbp_subscription":["700030"],"_bbp_author_ip":["223.181.60.135"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["459926"],"_bbp_last_active_time":["2026-06-17 11:25:32"],"_bbp_reply_count":["0"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["1"],"_bbp_engagement":["700030"],"_btv_view_count":["65"],"_bbp_topic_status":["unanswered"]},"test":"prathamesh-bhide04nmims-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/459926","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/459926\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=459926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}