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2013-01-12
Compact Bandstop Filter with Multiple Rejection Zeros
By
Progress In Electromagnetics Research Letters, Vol. 37, 55-64, 2013
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
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