A new type of monolithic broadband frequency doubler by using an array of pseudomorphic HEMTs

Abstract

In this paper, the author proposes a new type of monolithic frequency doubler, consisting of an array of pseudomorphic HEMTs, separated by inductances. As equivalent circuit, the doubler contains two nonlinear lines, one for the gate and one for the drain, which are coupled by the gate to drain capacitance. It is shown that the frequency bandwidth of this type of doubler is much larger compared to those obtain by other means. For the example presented in this paper, the +/-3 dB frequency bandwidth exceeds three octaves with a conversion efficiency of /spl sim/30%.