Vol. 105

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2021-09-30

A New Coupled-Line Based Dual-Band Branch-Line Coupler with Port-Extensions

By Rakibul Islam, Asif I. Omi, Mohammad A. Maktoomi, Christine Zakzewski, and Praveen Kumar Sekhar
Progress In Electromagnetics Research M, Vol. 105, 21-30, 2021
doi:10.2528/PIERM21081203

Abstract

In this paper, a coupled-line based dual-band branch-line coupler with port-extensions is presented. The configuration of the coupler consists of a single coupled-lines section, two transmission lines, and an easy to analyze L-section impedance matching network at all four ports of the coupler. A detailed theoretical analysis is carried out to obtain the closed-form design equations to determine the design parameters of the coupling structure. It is observed that the proposed dual-band coupler can support wide band-ratio and arbitrary power division. To validate the proposed design concept, a prototype working at 0.9 GHz and 1.8 GHz is fabricated on a 60 mil Rogers 4003C substrate exhibiting excellent match between the simulated and measured results.

Citation


Rakibul Islam, Asif I. Omi, Mohammad A. Maktoomi, Christine Zakzewski, and Praveen Kumar Sekhar, "A New Coupled-Line Based Dual-Band Branch-Line Coupler with Port-Extensions," Progress In Electromagnetics Research M, Vol. 105, 21-30, 2021.
doi:10.2528/PIERM21081203
http://jpier.org/PIERM/pier.php?paper=21081203

References