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2013-05-22

An Approach for Multi-Band Bandpass Filter Design Based on Asymmetric Half-Wavelength Resonators

By Xiuping Li and Huisheng Wang
Progress In Electromagnetics Research, Vol. 140, 31-42, 2013
doi:10.2528/PIER13031504

Abstract

This paper presents that the extra passband with two transmission zeros can be obtained by adding shunt open stubs to the asymmetric half-wavelength resonators structure. By using this method, a fourth or even higher passband with good selectivity and compact size can be obtained. Dual-band, tri-band and quad-band bandpass filters are demonstrated by using this method. The measured bandwidth is 80/180 MHz for the dual-band, 60/180/180 MHz for the tri-band and 130/360/170/70MHz for the quad-band filter, respectively. The measured insertion loss for the dual-band, tri-band and quad-band filter is less than 2.7 dB, 2.5 dB and 2.9 dB at the center frequency. All the simulated results and the measured results agree well.

Citation


Xiuping Li and Huisheng Wang, "An Approach for Multi-Band Bandpass Filter Design Based on Asymmetric Half-Wavelength Resonators," Progress In Electromagnetics Research, Vol. 140, 31-42, 2013.
doi:10.2528/PIER13031504
http://www.jpier.org/PIER/pier.php?paper=13031504

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