Title :
A novel compact ultra-wideband bandpass filter using microstrip stub-loaded dual-mode resonator doublets
Author :
Zhewang Ma ; He, Wenqing ; Chen, Chun-Ping ; Kobayashi, Yoshio ; Anada, Tetsuo
Author_Institution :
Graduate School of Science and Engineering, Saitama University, 338-8570, Japan
Abstract :
A novel compact ultra-wideband (UWB) bandpass filter is developed by using microstrip stub-loaded dual-mode resonator doublets. The proposed doublet consists of two parallel but oppositely arranged stub-loaded resonators, and has a significantly widened passband. A UWB filter is designed by cascading three doublets, and eight transmission poles are obtained in its passband. The filter has a passband covering 3.3-10.4 GHz, and exhibits sharp attenuations near its passband. The measured frequency response of the filter has a good agreement with the designed one, and the FCCpsilas indoor limit is satisfied quite well. The minimum strip and gap widths of the filter are larger than 0.1 mm. Therefore, critical fabrication precision requirement or complicated backside-aperture-fabrication process is avoided.
Keywords :
band-pass filters; microstrip resonators; ultra wideband technology; backside-aperture-fabrication process; frequency 3.3 GHz to 10.4 GHz; gap width; microstrip stub-loaded dual-mode resonator doublets; passband filter; strip width; transmission poles; ultrawideband bandpass filter; Attenuation; Band pass filters; Frequency measurement; Frequency response; Microstrip filters; Microstrip resonators; Passband; Resonator filters; Strips; Ultra wideband technology; Ultra-wideband; bandpass filter; dual-mode resonator; microstrip stub-loaded resonator;
Conference_Titel :
Microwave Symposium Digest, 2008 IEEE MTT-S International
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1780-3
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2008.4633196
