16.4 GHz SiGe BiCMOS Sub-Harmonic Mixer With Reactive I/Q Generators in RF and LO Paths

Abstract

This paper demonstrates a high-frequency 0.35-mu m SiGe BiCMOS sub-harmonic downconverter with reactive in-phase and quadrature-phase (I/Q) generators. Two reactive I/Q generators are integrated in our work to provide differential quadrature RI and LO signals. The I/Q sub-harmonic downconverter with single-ended LO, RI, and IF (IM) ports has a conversion gain of 1 dB, IP(1dB) of -10 dBm, IIP(3) of 0 dBm and IIP(2) of 21 dBm at 16.4 GHz. The magnitude and phase errors between the I and Q channels are 1.34% and 0.6 degrees, respectively. The dc power consumption of this I/Q mixer without output buffers is approximately 5 mW.