Radar Cross section Vs Reflection Coefficient

AI Thread Summary
The discussion centers on the relationship between the S11 parameter and radar cross-section (RCS) in antenna design using HFSS for low RCS applications. The user seeks to understand why S11 is calculated for the unit cell and how modifications to S11 might affect RCS. There is a focus on the importance of RCS in the context of the user's project, which involves designing antennas. The conversation also touches on the specifics of the antenna type and frequency range relevant to the HFSS signal. Understanding these relationships is crucial for optimizing antenna performance in low RCS scenarios.
jackRF
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I am working on HFSS and designing Antennas for LOW RCS , in all previous works they calculate the S11 parameter for the unit cell then make an array form this unit cell and calculate the RCS , my question is what is the relation between S11 and RCS and why we calculate S11 for the unit cell only and if i modify the unit cell's S11 it will improve the RCS or not
 
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Welcome to the PF. :smile:

Is this question for schoolwork or for regular work?
 
regular work
 
Thanks. I'll move it to the EE forum. Can you say more about the project? Why are you concerned about the radar cross-section of the antenna? What type of antenna is it, and what is the frequency range of the HFSS signal?
 

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