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Help required regarding corrugated horn antenna in HFSS

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Anuj_Modi

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Hey, friends, I want to ask one question. I am working on corrugated horn antenna and I have many doubts regarding it's simulation in HFSS. I have come to know that I have to give 6 modes while giving excitation. Now, the problem is that my cross polarization becomes worst when I define 6 modes. But when I define only 1 mode and that is its fundamental mode by default in HFSS, it gives me lot more better cross polarization response. Please help me!!! it becomes very critical for me to solve this problem as my research review is going to be in 10th February. And I am still not getting proper results for very basic corrugated horn antenna design in HFSS. please please reply as soon as possible!!!!
 

This paper may give you some reference:

ultra-wide_band_corrugated_gaussian_profiled_horn_antenna_design_4058.pdf
 

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