{"id":358609,"date":"2024-03-23T09:16:10","date_gmt":"2024-03-23T09:16:10","guid":{"rendered":"\/forum\/forums\/topic\/fss-unit-cell-with-pin-diode-simulation-using-floquet-port\/"},"modified":"2024-03-23T09:16:10","modified_gmt":"2024-03-23T09:16:10","slug":"fss-unit-cell-with-pin-diode-simulation-using-floquet-port","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fss-unit-cell-with-pin-diode-simulation-using-floquet-port\/","title":{"rendered":"FSS unit-cell with pin diode simulation using Floquet port"},"content":{"rendered":"<p>I am attempting to simulate a unit cell utilizing a Floquet port. The unit cell contains a pin diode that operates in two states. This diode is connected to the ground via a metal via hole and also includes a bias line. What is the correct procedure to simulate this configuration?<\/p>\n<p>Initially, I attempted to design the pin diode based on its equivalent circuit using lumped elements, specifically a rectangular surface with boundaries assigned as lumped elements. However, the simulation did not show any noticeable change in the S-parameters when compared to the unit cell without the diode.<\/p>\n<p>Considering the entire setup from a circuit perspective, the bias line is connected to a controller. One end of the diode is connected to the ground, completing the circuit. For the simulation, I intend to use the equivalent circuit for a single stage (on\/off) and thus, I believe the bias line may not be necessary. In this scenario, would the circuit be complete?<\/p>\n<p>I have come across some demonstrations of pin diode design within a transmission line, where both ends of the transmission line have lumped port excitations. I&#8217;m also curious to know if any modifications are required when using a Floquet port for this purpose.<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/23-03-2024-1711185325-Capture.PNG\" alt=\"\" width=\"296\" height=\"266\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/23-03-2024-1711185344-Capture2.PNG\" alt=\"\" width=\"256\" height=\"230\"><\/p>\n","protected":false},"template":"","class_list":["post-358609","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I am attempting to simulate a unit cell utilizing a Floquet port. The unit cell contains a pin diode that operates in two states. This diode is connected to the ground via a metal via hole and also includes a bias line. 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