simulation of metasurface using HFSS Floquet port

Hi everyone,

I am using the HFSS to simulate the metasurface in order to get the resonant frequency. I have done this (around 2.4 GHz)by using Perfect E and Perfect M boundary, and 1 Waveport. Now, I want to try the Floquet port and Master/Slave boundary. I followed the tutorial of HFSS (Get started with HFSS Floquet port) one step by one step, but didn't get the resonant frequency by studying the transmission/frequency curve. Please help me to check the attachment file. I really want to study the Floquet port because I may use it in order to get the dispersion curve and effective permittivity and permeability. The examples of calculating resonant frequency, dispersion relation and effective parameters are also welcome!

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Thanks

The resonance for your structure is not 2.5 GHz. It is more than 4 GHz. Even with Perfect E/H boundaries - you need to use 2 waveports.

Increase your frequency sweep to say 8 GHz and when using for Floquet ports - plot S21 for mode 2 as well.