I have tried to simulate the structure introduced in this article:
"Steer by Image Technology for Intelligent Reflecting Surface Based on Reconfigurable Metasurface with Photodiodes as Tunable Elements" LINK: https://www.mdpi.com/2073-4352/12/7/951
However the results are not what is expected!!
The port is "floquet" and boundary conditions are unit cell.
First question is, as the backside of structure is photodiode, how zmin in boundary conditions should be defined?
Second is, photodiode model in article is said series varible capacitance and a resistor....i did it with lumped element....is that right? If it is, why can't I see frequency resonance in S11 magnitude as the article?
Phase is only match in your desired frequency but good ris surface design in phase and s11 is match at sam frequency
Phrase is only match in your desire occurrence when the S11 magnitude offset the best interest of the researcher that is not mentioned in the article. To me is best known to the researcher that is why is not mentioned in the article.
Ankit Sharma
Friday Okoh Onum
Thanks for your response, however, Im afraid, I dont get what you mean!
As article said, based on different amount of photodiode capacitance, we have resonante frequency. Frequency range mentioned in the article is 0.5GHz to 1.5GHZ, which you can see resonante frequency of each capacitance.
I designed this structure in CST, chose the suggested frequency range and simulated it with frequency solver. the result was expected to be the same as figure a and b above.....but mine was the other two figures!!!!!
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