2 c) Consider a 4-port lossless 20 dB coupler. Port 1 is bei…
2 c) Consider a 4-port lossless 20 dB coupler. Port 1 is being used as the input port and Port 4 is the isolated port. Port 2 is the coupled port. The coupler has perfect (infinite) isolation. The input reflection coefficient is -30 dB. If the coupler is reciprocal, can you find S13 (in dB) ? ( Hint: You can use the equation below for solving for the intermediate steps to your calculation).