A Novel Compact Dual-Band Bandpass Filter Using Dual-Mode Resonators

Min-Hung WENG  Cheng-Yuan HUNG  Hung-Wei WU  

IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.1    pp.146-148
Publication Date: 2005/01/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.1.146
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
dual-band,  dual-mode,  cross shaped resonator,  ring resonator,  attenuation rate,  transmission zero,  

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The paper reports a compact and high performance dual-band bandpass filter (BPF) using two types of dual-mode resonators. The dual mode cross shaped resonator and the three dual mode ring resonators in the designed dual-band BPF are excited to control the first and second passband, respectively. It is shown that the designed and fabricated dual-band BPF has narrow bandwidths and very sharp attenuation rate due to the existence of the transmission zeros. The frequency response of the designed dual-band BPF shows good agreement between the simulations and experiments.