Vol. 37

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2013-01-12

Compact Bandstop Filter with Multiple Rejection Zeros

By Guotao Yue, Xubo Wei, Bo Fu, Shuanglin Yuan, Meijuan Xu, and Jiaxuan Liao
Progress In Electromagnetics Research Letters, Vol. 37, 55-64, 2013
doi:10.2528/PIERL12112701

Abstract

This paper presents a compact band stop filter (BSF) based on the dual metal plane configuration with multiple rejection zeros (RZs). Quasi-lumped technique with novel patch-via-spiral dual mode resonator is applied to the design of the proposed filter. Multiple rejection zeros are introduced by open-end stubs for high selectivity. Design equations are obtained by using a lossless transmission line model. The calculated results show that the lower and upper rejection zeros can be easily tuned by the coupling capacitor and the open-end stubs respectively. By using the Microstrip-Coplanar-Waveguide (CPW) structure, the size of the proposed filter can be reduced to 12.8 mm x 9 mm(i.e., 0.24λg x 0.17λg), where λg denotes the guided wavelength at center frequency.

Citation


Guotao Yue, Xubo Wei, Bo Fu, Shuanglin Yuan, Meijuan Xu, and Jiaxuan Liao, "Compact Bandstop Filter with Multiple Rejection Zeros," Progress In Electromagnetics Research Letters, Vol. 37, 55-64, 2013.
doi:10.2528/PIERL12112701
http://www.jpier.org/PIERL/pier.php?paper=12112701

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