BasicRF
Newbie level 3
confused about S11
There are two amplifiers whose parameters are as follows:S11A=-20dB,S21A=10dB;S11B=-2dB,S21B=10dB.
If they are connected between RF ignal source (if available power equals 0dBm) and Spectrum Analyzer respectively, is 10dBm displayed on Spectrum Analyzer ?(becasuse when Ts=0,TL=0,the GT=S21(dB))
If it happens,when designing an amplifier,why we always care S11 and S22?
There are two amplifiers whose parameters are as follows:S11A=-20dB,S21A=10dB;S11B=-2dB,S21B=10dB.
If they are connected between RF ignal source (if available power equals 0dBm) and Spectrum Analyzer respectively, is 10dBm displayed on Spectrum Analyzer ?(becasuse when Ts=0,TL=0,the GT=S21(dB))
If it happens,when designing an amplifier,why we always care S11 and S22?