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SPDT Reflective switch

Question asked by Kamalpreet on Feb 27, 2020

Hi,

In the attached circuit, the value of S21 is coming out to be 11.009 dB. Instead, it should be 6 dB+insertion loss of first switch+ insertion loss of 2nd switch + 6dB = 12.84 dB. The issue is with the open port impedance because i want to use the switch in reflective configuration. But, as i specify the open port impedance as 10 kohm , there is a different value of S21 in comparison with the expected one.Could you please guide me about what value of open port impedance should i choose so that S21 should be 12.84dB.

Thanks 

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