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2013-02-05

Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications

By Yan-Liang Wu, Cheng Liao, Xiang-Zheng Xiong, and Xuan-Ming Zhong
Progress In Electromagnetics Research C, Vol. 37, 145-157, 2013
doi:10.2528/PIERC12111808

Abstract

Two ultra-wideband (UWB) microstrip bandpass filters (BPFs) are proposed by using tunable E-shaped dual-mode microstrip Stepped-Impedance Resonator (SIR). For the lower band filter measurement results show there is a passband of 3.1 GHz to 5.2 GHz and its 3 dB fractional bandwidth is 51%. The UWB upper band filter may be obtained by tuning E-shaped SIR. The measurement results show there is a passband of 6 GHz to 10.6 GHz and its 3 dB fractional bandwidth is 55%. Compared with the similar investigation using the cascade of electromagnetic band gap (EBG)-embedded multiplemode resonator (MMR) and fork resonator, the proposed approach has some advantages, such as easier adjustment of bandwidths, better passband performances and smaller size etc.

Citation


Yan-Liang Wu, Cheng Liao, Xiang-Zheng Xiong, and Xuan-Ming Zhong, "Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications," Progress In Electromagnetics Research C, Vol. 37, 145-157, 2013.
doi:10.2528/PIERC12111808
http://jpier.org/PIERC/pier.php?paper=12111808

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