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PIER PIER B PIER C PIER M PIER Letters
2010-12-04
Dual-Band Equal/Unequal Wilkinson Power Dividers Based on Coupled-Line Section with Short-Circuited Stub
By
Bo Li,

    Dr. Bo Li

    School of Electrical and Electronic Engineering

    Nanyang Technological University

    Singapore

    Homepage

Xidong Wu,

    Prof. Xidong Wu

    Department of Information Science & Electronic Engineering

    Zhejiang University

    China

    Homepage

Nan Yang,

    Dr. Nan Yang

    Department of Information and Electronic Engineering

    Zhejiang University

    China

    Homepage

Wen Wu

    Dr. Wen Wu

    Nanjing University of Science & Technology

    China

    Homepage

Progress In Electromagnetics Research, Vol. 111, 163-178, 2011
doi:10.2528/PIER10110108
Abstract
This paper presents dual-band equal/unequal Wilkinson power dividers based on a coupled-line section with short-circuited stub (called as the ``coupled-line section" for short), which consists of a pair of parallel coupled lines and a short-circuited stub. With the analyses of the phase shift and equivalent characteristic impedance, the coupled-line section is used to replace the quarter-wavelength branch line in the conventional equal/unequal Wilkinson power divider to obtain excellent dual-band operation. The closed-form equations and design procedures of dual-band Wilkinson power divider are given, where one degree of design freedom is obtained and design flexibility is shown. As two examples, a dual-band equal Wilkinson power divider with the frequency ratio of 1.8:1 and an unequal one with the high power dividing ratio of 7:1 and frequency ratio of 1.8:1 are designed, fabricated and measured. The measurements are in good agreement with the simulations. It is shown that the proposed power dividers have simple topologies, and can be easily fabricated with small frequency ratios and high power dividing ratios.
Citation
Bo Li, Xidong Wu, Nan Yang, and Wen Wu, "Dual-Band Equal/Unequal Wilkinson Power Dividers Based on Coupled-Line Section with Short-Circuited Stub," Progress In Electromagnetics Research, Vol. 111, 163-178, 2011.
doi:10.2528/PIER10110108
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