{"id":458766,"date":"2026-05-24T11:24:42","date_gmt":"2026-05-24T11:24:42","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfssnexxim-co-simulation-for-gcpw-fed-active-antenna-with-amplifier\/"},"modified":"2026-05-24T11:24:42","modified_gmt":"2026-05-24T11:24:42","slug":"hfssnexxim-co-simulation-for-gcpw-fed-active-antenna-with-amplifier","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfssnexxim-co-simulation-for-gcpw-fed-active-antenna-with-amplifier\/","title":{"rendered":"HFSS+Nexxim co-simulation for GCPW-fed active antenna with amplifier"},"content":{"rendered":"

<p data-start=”0″ data-end=”15″>Hello everyone,<\/p><p data-start=”17″ data-end=”102″>I am currently working on a millimeter-wave Antenna-in-Package (AiP) co-design using:<\/p><ul data-start=”104″ data-end=”219″><li data-section-id=”jkgamx” data-start=”104″ data-end=”116″>HFSS 3D EM<\/li>\n

<li data-section-id=”kkw3sd” data-start=”117″ data-end=”141″>Ansys Circuit \/ Nexxim<\/li>\n

<li data-section-id=”16oob0o” data-start=”142″ data-end=”166″>Differential GCPW feed<\/li>\n

<li data-section-id=”xn0cei” data-start=”167″ data-end=”180″>IPD antenna<\/li>\n

<li data-section-id=”n2apkw” data-start=”181″ data-end=”219″>Distributed Amplifier (DA) S2P model<\/li>\n<\/ul>\n

<p data-start=”221″ data-end=”248″>The system architecture is:<\/p><p data-start=”250″ data-end=”342″>Connector<br data-start=”259″ data-end=”262″>→ Differential GCPW<br data-start=”281″ data-end=”284″>→ DA<br data-start=”288″ data-end=”291″>→ Differential GCPW<br data-start=”310″ data-end=”313″>→ Signal vias<br data-start=”326″ data-end=”329″>→ IPD antenna<\/p><p data-start=”344″ data-end=”365″>My goal is to obtain:<\/p><ul data-start=”367″ data-end=”486″><li data-section-id=”248qxm” data-start=”367″ data-end=”388″>Active antenna gain<\/li>\n

<li data-section-id=”zabgrz” data-start=”389″ data-end=”415″>Active radiation pattern<\/li>\n

<li data-section-id=”1700oiw” data-start=”416″ data-end=”486″>Far-field results including the DA gain, phase, and mismatch effects<\/li>\n<\/ul>\n

<p data-start=”488″ data-end=”508″>I would like to ask:<\/p><\/p>\n

    <li data-section-id=”wmh6a1″ data-start=”510″ data-end=”629″>If the goal is to obtain the active radiation pattern including amplifier effects, what is the recommended workflow?<\/li>\n

    <li data-section-id=”d3uhyg” data-start=”631″ data-end=”658″>Is the correct approach:<\/li>\n<\/ol>\n

    <p data-start=”660″ data-end=”842″>HFSS simulates only the antenna + feed structure<br data-start=”708″ data-end=”711″>→ dynamic link to Circuit\/Nexxim<br data-start=”743″ data-end=”746″>→ insert the DA S2P model in Circuit<br data-start=”782″ data-end=”785″>→ solve the active far-field pattern from Circuit\/Nexxim?<\/p><\/p>\n

      <li data-section-id=”nu5s2e” data-start=”844″ data-end=”944″>For the differential GCPW feed, which port type is more appropriate at the DA insertion location?<\/li>\n<\/ol>\n

      <ul data-start=”945″ data-end=”985″><li data-section-id=”19iwbmc” data-start=”945″ data-end=”958″>Lumped port<\/li>\n

      <li data-section-id=”1yz5shu” data-start=”959″ data-end=”973″>Circuit port<\/li>\n

      <li data-section-id=”1rokad0″ data-start=”974″ data-end=”985″>Wave port<\/li>\n<\/ul>\n

        <li data-section-id=”9kki8x” data-start=”987″ data-end=”1046″>Also, what is the correct method to simulate and obtain:<\/li>\n<\/ol>\n

        <ul data-start=”1047″ data-end=”1162″><li data-section-id=”248qxm” data-start=”1047″ data-end=”1068″>Active antenna gain<\/li>\n

        <li data-section-id=”zabgrz” data-start=”1069″ data-end=”1095″>Active radiation pattern<\/li>\n

        <li data-section-id=”18rgxsh” data-start=”1096″ data-end=”1162″>Far-field results including DA gain, phase, and mismatch effects<br><\/li>\n<\/ul>\n

        <p data-start=”1164″ data-end=”1230″>Any suggestions or example workflows would be greatly appreciated.<\/p><p data-start=”1232″ data-end=”1242″ data-is-last-node=”” data-is-only-node=””>Thank you.<br><br><\/p><\/p>\n","protected":false},"template":"","class_list":["post-458766","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27793"],"_bbp_topic_id":["458766"],"_bbp_subscription":["691233","15859"],"_bbp_author_ip":["2407:4b00:1c0b:8113:c8:a5d6:102e:78c9"],"_bbp_last_reply_id":["458770"],"_bbp_last_active_id":["458770"],"_bbp_last_active_time":["2026-05-25 00:16:57"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["691233","15859"],"_btv_view_count":["33"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"]},"test":"r13942107ntu-edu-tw"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458766","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\/458766\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=458766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}