port-to-port isolation equation in ADS

[ania ghane]

For port-to-port isolation curve in data display window in ADS, I need to LO2IF, LO2RF,… equations, but I can’t write it, because I don’t know it’s relation, can I help me about it, please????????

 

[BigBoss]

If you do a HB simulation and all ports are 50 Ohm, use dBm function to calculate power at the port then extract the powers between each other at frequency of interest.This will give you
isolation between the ports.For instance if you have LO=1GHz,IF=10MHz and RF=1.01GHz your common beat will be at 10MHz.
dBm(VRF[1])=Power at 10MHz @port VRF
dBm(VRF[100])Power at 1GHz @port VRF
So isolationRF_LO=dBm(VRF[1])-dBm(VRF[100])
etc..
Tou can use this method to all ports.
There are other possibilities as well like Mixer Design Guide , use it with proper templates.