muheeb16
Member level 3

1-I have designed an LNA amplifier at 5.5 GHz and a Dielectric Resonator at 5GHz.I was hoping to down convert the LNA output using a dual gate mixer (5.5GHz at RF and 5GHz at LO) but none of the dual gate FETs I came across operate at such high frequencies e.g BF998 2-While designing the FET mixer,can I use the S parameters for calculations?Aren't they specified for linear models while mixer is clearly non-linear.