Hybrid integrated frequency multiplier from 10 to 30 GHz

A hybrid integrated tripler with 29 percent overall efficiency and a CW output power of 50 mW at 30 GHz has been built by using integrated circuit techniques. Optimum dimensions of the microstrip circuit on a quartz substrate have been obtained by building an oversize multiplier with an output frequency of 800 MHz and by reducing the circuit dimensions and the junction capacitance of the varactor diode 37.5 times.