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Progress In Electromagnetics Research Letters
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DESIGN OF COMPACT WIDEBAND BANDPASS FILTER WITH GOOD PERFORMANCES BASED ON NOVEL CRLH RESONATOR

By G.-C. Wu, G. Wang, and Y.-W. Wang

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Abstract:
A novel miniaturized composite right/left-handed (CRLH) transmission line based on the structure of spiral inter-digital is proposed and analyzed in this article. Compared with the conventional inter-digital CRLH, the proposed CRLH realizes a 25% resonace frequency shift, and the miniaturization is realized. Then, a compact bandpass filter centered at 1.00 GHz with minimum insertion loss 0.42 dB was designed, fabricated and measured. The measured results show that the band width is 61.6% and that the sharpness at the two edges of passband is 212.5 dB/GHz and 607.1 dB/GHz. This designed filter has very high selectivity. Besides, the whole size of the designed filter is 0.114λ×0.054λ. The filter realizes the miniaturization effectively, and this designed bandpass filter has good performances and smaller size than the same works in references.

Citation:
G.-C. Wu, G. Wang, and Y.-W. Wang, "Design of Compact Wideband Bandpass Filter with Good Performances Based on Novel CRLH Resonator," Progress In Electromagnetics Research Letters, Vol. 40, 201-207, 2013.
doi:10.2528/PIERL13050402
http://www.jpier.org/pierl/pier.php?paper=13050402

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