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- Title
DESIGN FILTERS USING TUNABLE E-SHAPED DUAL-MODE RESONATORS FOR LOWER-ULTRA-WIDEBAND AND UPPER-ULTRA-WIDEBAND APPLICATIONS.
- Authors
Yanliang Wu; Cheng Liao; Xiangzheng Xiong; and Xuanming Zhong
- 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 3.1GHz to 5.2GHz 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 6GHz to 10.6GHz and its 3 dB fractional bandwidth is 55%. Compared with the similar investigation using the cascade of electromagnetic band gap (EBG)-embedded multiple-mode resonator (MMR) and fork resonator, the proposed approach has some advantages, such as easier adjustment of bandwidths, better passband performances and smaller size etc..
- Subjects
ULTRA-wideband devices; BANDPASS filters; RESONATORS; ELECTRIC impedance; ELECTROMAGNETIC bandgap structures; BANDWIDTHS
- Publication
Progress in Electromagnetics Research C, 2013, Vol 37, p145
- ISSN
1937-8718
- Publication type
Article