Design of compact planar rat-race and branch-line hybrid couplers using polar curves

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Authors

Joubert, Johan
Odendaal, J.W. (Johann Wilhelm)

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Publisher

Wiley

Abstract

An approach where polar curves are used to miniaturize hybrid couplers is presented. The design of such couplers can be done with the optimization of a few parameters using full-wave analysis software. The results show similar or better electrical performance for a rat-race and branch-line coupler with respectively a 75% and 50% size reduction.

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Keywords

Hybrid coupler, Rat-race coupler, Branch-line coupler, Polar curve, Compact coupler

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Citation

Joubert, J & Odendaal, JW 2015, 'Design of compact planar rat-race and branch-line hybrid couplers using polar curves', Microwave and Optical Technology Letters, vol. 57, no. 11, pp. 2637-2640.