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How can patch antennas be represented using equivalent circuit models in HFSS?

I want to approximate patch antennas using RLC or transmission-line equivalents in HFSS.
This approach can help understand resonance, input impedance, and bandwidth without full-wave simulation each time.
I need guidance on building and validating such equivalent models.

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By Hema Answered 1 year ago

From my experience, representing a patch antenna with an equivalent RLC or transmission-line circuit is a powerful way to gain insight into resonance and impedance behavior. I have seen designers extract parameters such as resonant frequency, Q-factor, and radiation resistance from EM simulation results, then map them to series or parallel RLC components. I would recommend validating the equivalent model against full-wave HFSS simulations to ensure accuracy across the frequency band. In practice, this approach simplifies preliminary design iterations, facilitates understanding of input impedance, and allows rapid tuning before committing to full-wave computationally expensive simulations.

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