High dynamic range, high output power I/Q modulator in 50 GHz f/sub t/ SiGe technology

This paper presents the design and measurement results of a high dynamic range quadrature modulator integrated in Atmel's 50 GHz f/sub 1/ SiGe foundry technology. An integrated differential cascode output amplifier boosts the output compression point to >14.3 dBm (3.5 V/sub pp/ diff. input referred) without sacrificing dynamic range. A three-stage polyphase filter provides high image rejection from 700 MHz to 2700 MHz.