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HFSS de-embedding probelm

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anoop0988

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Hi,

I am simulating a simple coax in hfss with waveports defined at both the ends. When I change the length, all the S parameters have changed.
Theoretically, S12 and S21 should be changed by a factor of exp(j*beta*length) and the S11 and S22 should change by factor of exp(2*j*beta*length).
Although the S12 and S21 results are matching according to the theory but the S11 and S22 are not matching.

Please let me know how HFSS is calculating the de-enbedding for S11 and S22.

Thanks.
 

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