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A novel 20 to 40 GHz monolithic passive differential coupler for MMICs applications

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3 Author(s)
Hamed, K.W. ; Dept. of Electr. & Comput. Eng., Queen''s Univ., Kingston, Ont., Canada ; Freundorfer, A.P. ; Antar, Y.M.M.

This paper presents the design and performance characteristics of a novel broadband passive differential coupler that has been developed for MMIC's applications. The new coupler utilizes a multi-dielectric layer structure to achieve a broadband performance from 20 to 40 GHz in a simple coplanar configuration. A return loss better than 20 dB, with an isolation of 25 dB have been achieved over the band of interest. Also a phase and amplitude mismatch better than 2° and 1 dB has been realized over the frequency band from 20 to 40 GHz. This performance is especially important to the intended use with wideband double balanced mixers, and amplifiers.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005