A 2-GHz quadrature hybrid implemented in CMOS technology

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10 March 2003

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits

Vol. 38 (3) , 550-555
https://doi.org/10.1109/jssc.2002.808287

Abstract

We have derived a lumped-element circuit from its coupled line counterpart for a quadrature hybrid coupler. We discuss the uses, design, and characteristics of such circuits in CMOS technology. We show measured characteristics of an example 50-/spl Omega/ 2-GHz coupler with 65 dB of image rejection, 22 dB of directivity, and a 4.7-dB noise figure.

Keywords

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