isolation in mixer and how to measure or simulate it
The ratio (in dB) of the power level applied at one port of a mixer to the resulting power level at the same frequency appearing at another port. Commonly specified isolation parameters of mixers are:
1. LO to RF port: The degree of attenuation of the LO signal measured at the RF port with the IF port properly terminated.
2. LO to IF port: The degree of attenuation of the LO signal measured at the IF port with the RF port properly terminated.
3. RF to IF port: The degree of attenuation of the RF signal measured at the IF port with the LO port properly terminated.
Normally the inverse isolation characteristics (such as RF to LO, IF to LO, and IF to RF) are essentially equivalent in a double-balanced mixer.