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2009-09-26
Novel Microstrip Bandpass Filters Using Direct-Coupled Triangular Stepped-Impedance Resonators for Spurious Suppression
By
Progress In Electromagnetics Research Letters, Vol. 12, 11-20, 2009
Abstract
This paper presents a novel spurious suppressed bandpass filter designed with triangular stepped-impedance resonators. The proposed resonators are folded for a triangular schematic, which creates two transmission zeros. By varying the line width of resonators, one of the zeros is tuned to suppress the first and second spurious responses, and the other is used to improve skirt selectivity. The current study analytically derives explicit design equations and fabricates a three-pole Chebyshev bandpass filter centered at 1.5 GHz based on the direct-coupled structure. The experimental results show spurious suppression improvement more than 20 dB up to 5.6 f0.
Citation
Kuo-Sheng Chin, and Deng-Jun Chen, "Novel Microstrip Bandpass Filters Using Direct-Coupled Triangular Stepped-Impedance Resonators for Spurious Suppression," Progress In Electromagnetics Research Letters, Vol. 12, 11-20, 2009.
doi:10.2528/PIERL09090602
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