//Caption:Calculate (i)-power gain in dB ,(ii)-power gain if it is USB converter. //Exa:9.3 clc; clear; close; f_s=2*10^9;//in Hz f_p=12*10^9;//in Hz R_i=16; R_s=1000; A_p=10*log((f_p-f_s)/f_s); A_p_usb=10*log((f_p+f_s)/f_s); disp(log(10),'Power gain (in dB) ='); disp(A_p_usb,'Power gain as USB converter (in dB) =');