Integrated S band mixers

This paper describes the approaches used and some of the results obtained building integrated mixers in
S
band. These mixers are built with a unique "bilithic" Schottky-barrier diode chip and evaporated microstrip circuitry on alumina dielectric. Mixer noise figures are less than 7.5 db with local oscillator powers of
\approx 3
to 30 mw. The impedances are
50 \Omega
in and out with the signal input VSWR being less than 1.5/1 over the local oscillator range and a bandwidth of
\pm 15
%.