A 30-GHz monolithic single balanced mixer with integrated dipole receiving element

This paper will describe a 30-GHz monolithic low-noise balanced mixer which has been developed using an integrated bow-tie antenna to waveguide transition and low parasitic Mott diodes. The diodes and mixer circuit were developed using MBE material and were fabricated using a plated airbridge technology. Measurements on the diode at dc and RF showed that the zero bias junction capacitance was 0.02 pF and the series resistance was 10 Ω. A Mixer conversion loss of 6dB was measured at 30 GHz with an IF of 1 GHz.