Low cost, high performance ka-band mixer for a microwave and millimeter system

In this paper, a third-order harmonic mixer is designed using frequency multiplier theory for the Ka-band. the gate bias voltage is selected by adjusting frequency multiplier theory to maximize the third-order harmonic element(3×fLO) of the fundamental LO frequency (fLO) for the harmonic mixing. The proposed 33.5 GHz mixer using a commercial GaAs MESFET device with a plastic package has a -10 dB conversion loss by pumping 11.5 GHz LO with + 5 dBm level.