AN APPROACH FOR MULTI-BAND BANDPASS FILTER DESIGN BASED ON ASYMMETRIC HALF-WAVELENGTH RESONATORS | Zendy

Xiuping Li | Zendy; HuiSheng Wang | Zendy

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AN APPROACH FOR MULTI-BAND BANDPASS FILTER DESIGN BASED ON ASYMMETRIC HALF-WAVELENGTH RESONATORS

Author(s) -

Xiuping Li,

HuiSheng Wang

Publication year - 2013

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier13031504

Subject(s) - band pass filter , resonator , wavelength , optoelectronics , prototype filter , materials science , filter (signal processing) , electronic engineering , physics , optics , filter design , electrical engineering , engineering

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 fllters are demonstrated by using this method. The measured bandwidth is 80/180MHz for the dual-band, 60/180/180MHz for the tri-band and 130/360/170/70MHz for the quad-band fllter, respectively. The measured insertion loss for the dual-band, tri-band and quad-band fllter is less than 2.7dB, 2.5dB and 2.9dB at the center frequency. All the simulated results and the measured results agree well.

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