A high-efficiency miniaturized SiGe Ku-band balanced frequency doubler

Abstract

A monolithic SiGe balanced frequency doubler has been designed and measured for Ku-band application. The circuit operates with a 2 V supply voltage and consumes only 28 mW of DC power when the doubler is biased close to class B operation, with an input power of 1.5 dBm. An output power of 5-6 dBm is obtained from 15.4-18 GHz and the fundamental suppression is better than 25 dB. It has a high power added efficiency (PAE) of 9.2% and occupies only 700/spl times/350 /spl mu/m/sup 2/ of chip area.