Compact dual-mode wideband filter based on complementary split-ring resonator
Date
2014
Authors
Ebrahimi, A.
Withayachumnankul, W.
Al-Sarawi, S.
Abbott, D.
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IEEE Microwave and Wireless Components Letters, 2014; 24(3):152-154
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Amir Ebrahimi, Withawat Withayachumnankul, Said F. Al-Sarawi, and Derek Abbott
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Abstract
This letter proposes a microstrip filter based on a dual-mode complementary split-ring resonator (DMCSRR). For the input/output coupling, a dual C-shaped feed structure is implemented together with the DMCSRR to acheive a wideband response. The resonator offers a wide fractional bandwidth of 62% at the central frequency of 2.23 GHz and a very compact structure with a footprint of 0.0625λg×0.18λg, where λg is the guided wavelength at the midband frequency. A comprehensive lumped element circuit analysis accompanies the simulation and measurement results.
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© 2013 IEEE