一种具有谐波抑制特性的窄带带通滤波器设计

Abstract

Abstract:

A compact narrow band-pass filter with a low insertion loss and multi-order harmonics suppression is proposed. The harmonic suppression is realized through transmission zeros of the parallel coupled lines loaded open-circuited resonator, and the filter passband characteristics are determined by the short-circuited stubs. By coupling of the transmission line model of this filter and even- and odd-mode analysis, the expressions for calculating element parameters are presented, and thus the design process in this paper is fast and accurate. Finally, a band-pass filter working in 2.4 GHz is developed. Simulation and measured results show that the passband insert-loss is 0.4 dB, that stopband attenuations at second and third harmonics frequency are more than 35 dB, and that stopband attenuations at fourth is about 20 dB.

Key words: bandpass filters, microstrip lines, harmonics suppression, even- and odd-more analysis

CLC Number:

TN822

ZHAO Jian-zhong;YANG Jin-ping;YANG Guo;WU Wen. Design of a compact narrow band-pass filter with harmonics suppression[J].J4, 2009, 36(3): 568-572.

References

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Design of a compact narrow band-pass filter with harmonics suppression

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