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Progress In Electromagnetics Research
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A COMPACT MICROSTRIP QUADRUPLEXER USING SLOTLINE STEPPED IMPEDANCE STUB LOADED RESONATORS

By Z.-P. Li, L.-J. Zhang, T. Su, and C.-H. Liang

Full Article PDF (407 KB)

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:
Z.-P. Li, L.-J. Zhang, T. Su, and C.-H. 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
http://www.jpier.org/PIER/pier.php?paper=13042105

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