Ultra high IP3 passive GaAs FET mixers

This paper describes single-balanced passive GaAs FET mixers with different balancing principles for the lower GHz range. The mixers achieve conversion losses of about 7 dB and input third-order intercept points (IIP3) of up to 44 dBm. Port isolation values of more than 70 dB have been achieved. Different balancing topologies, design process and results are being discussed.