Hi UlyssesThank you for the reference to AN4974. It helped quite a bit. Unfortunately, I am not familiar with Qucs, so I am not sure ow S21 was calculated.In the graph shared by Travis , S21 is negative dB. If S21 is the transfer function from the ch...
Thank you UlyssesMaybe I don't understand how we can measure/simulate the S21 of a 1 port system.Are you looking at the antenna itself a the 2 port? Do you connect the Z0 to it? Thanks Alex