Compact LowPass Filter with Wide StopBand Using Non-Uniform Microstrip Resonant Cells

Abstract:

In this paper, a novel compact microstrip lowpass filter is designed. The proposed filter which is etched on the 50 Ω microstrip line consists of four non-uniform 1-D microstrip photonic bandgap (PBG) cells with different cutoff frequency.. The demonstration lowpass filter with 2.2 GHz cutoff frequency is designed, fabricated and measured. The measurement results show that the band rejection effect is better than -20 dB from 2.8 GHz to 10 GHz, the insertion is less than 2 dB, and the length of filter is 5.6 cm long. Compared with the conventional filter, the proposed filter has smaller size. Meanwhile, it overcomes the problems of narrow stop-band and low harmonic suppression. Furthermore, the impedance matching is not need to be considered. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

• Periodical: Applied Mechanics and Materials (Volumes 263-266)
• Pages: 15-19
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.263-266.15
• Online since: December 2012
• Authors: Yan Liang, Xiao Ming Wu, Bi Hua Tang, Yong Le Wu
• Keywords: Harmonic Suppression, Lowpass Filter, Non-Uniform Microstrip Resonant Cell, Photonic Bandgap (PBG)

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