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SPDT Reflective switch

Question asked by Kamalpreet on Feb 27, 2020


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.