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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2021-09-30
A New Coupled-Line Based Dual-Band Branch-Line Coupler with Port-Extensions
By
Rakibul Islam,

    Dr. Rakibul Islam

    University of Illinois at Urbana-Champaign

    USA

    Homepage

Asif Iftekhar Omi,

    Dr. Asif Iftekhar Omi

    Washington State University

    USA

    Homepage

Mohammad A. Maktoomi,

    Dr. Mohammad A. Maktoomi

    University of Scranton

    USA

    Homepage

Christine Zakzewski,

    Dr. Christine Zakzewski

    The University of Scranton

    USA

    Homepage

Praveen Kumar Sekhar

    Dr. Praveen Kumar Sekhar

    School of Engineering and Computer Science

    Washington State University

    USA

    Homepage

Progress In Electromagnetics Research M, Vol. 105, 21-30, 2021
doi:10.2528/PIERM21081203 | Google Scholar

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.
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Citation
Rakibul Islam, Asif Iftekhar 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
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