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PIER PIER B PIER C PIER M PIER Letters
2013-06-18
A Compact Microstrip Quadruplexer Using Slotline Stepped Impedance Stub Loaded Resonators
By
Zhi-Peng Li,

    Dr. Zhi-Peng Li

    Key Laboratory of Science and Technology on Antennas and Microwaves

    Xidian University

    People’s Republic of China

    Homepage

Li-Juan Zhang,

    Dr. Li-Juan Zhang

    Xidian University

    China

    Homepage

Tao Su,

    Dr. Tao Su

    National Laboratory of Antennas and Microwave Technology

    Xidian University

    China

    Homepage

Chang-Hong Liang

    Professor Chang-Hong Liang

    School of Electronics Engineering

    Xidian University

    China

    Homepage

Progress In Electromagnetics Research, Vol. 140, 509-522, 2013
doi:10.2528/PIER13042105
Abstract
In this paper, a novel compact quadruplexer is implemented by using slotline stepped impedance stub loaded resonators (SISLRs) in ground plane. Four folded dual-mode slotline SISLRs with one input and four output coupled line structures are designed at different frequencies for the quadruplexer operation. By properly adjusting the geometrical parameters of a single dual-mode slotline SISLR, its first two resonant frequencies can be controlled, and thus it can be utilized to implement a second-order bandpass filter when these resonant frequencies are suitably assigned. Furthermore, because the proposed quadruplexer utilizes the distributed coupling technique, a small circuit size can be obtained. As a result, the proposed quadruplexer occupies an extremely small area, i.e., 0.22λ0 × 0.25 λ0(0.36λg × 0.41λg). Finally, good agreement between measurement and EM simulation verifies the design method successfully.
Citation
Zhi-Peng Li, Li-Juan Zhang, Tao Su, and Chang-Hong Liang, "A Compact Microstrip Quadruplexer Using Slotline Stepped Impedance Stub Loaded Resonators," Progress In Electromagnetics Research, Vol. 140, 509-522, 2013.
doi:10.2528/PIER13042105
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