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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2019-12-26
Compact Directional Coupled-Line Coupler with Independent Power Division Ratios at Dual Bands
By
Siyue Zhou,

    Dr. Siyue Zhou

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Xiaochuan Shen,

    Dr. Xiaochuan Shen

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yongle Wu,

    Prof. Yongle Wu

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yuan'an Liu

    Dr. Yuan'an Liu

    School of Telecommunication Engineering,

    Beijing University of Posts and Telecommunications

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 88, 121-128, 2020
doi:10.2528/PIERL19101202 | Google Scholar

Abstract
This paper presents the first coupled-line coupler that provides independent power division ratios at dual bands. In contrast with previous dual-band coupled-line couplers, the power division ratios k2(f2) and k2(f2) at each band (f1 and f2) can be independently controlled in order to satisfy the requirements of various communication protocols at different bands. Moreover, it has a compact size due to the usage of coupled lines rather than transmission lines. Explicit design equations and design guide of the coupler are provided. In this letter, one prototype of the proposed coupler is simulated, fabricated, and measured. It provides power division ratios k2(f1)=4 dB at f1=1 GHz and k2(f2)=8 dB at f2=2.4 GHz. The measured result agrees well with the simulation.
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Citation
Siyue Zhou, Xiaochuan Shen, Yongle Wu, and Yuan'an Liu, "Compact Directional Coupled-Line Coupler with Independent Power Division Ratios at Dual Bands," Progress In Electromagnetics Research Letters, Vol. 88, 121-128, 2020.
doi:10.2528/PIERL19101202
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