first: sorry for my bad english!
i want to design the analog part of an RFID. to build an appropriate antenna i have to simulate the impedance at the hf1/hf2 pins of the analog part, especially the rectifier. but i am not sure, if a sp-analysis and plotting
imag(zp(1 1 ?result "sp"))
real(zp(1 1 ?result "sp"))
with a "port" connected to hf1 hf2 respectively is the right way. can anyone help me please?