Title :
A miniaturized dual-mode ring bandpass filter with a new perturbation
Author :
Tan, Boon Tiong ; Yu, Jong Jen ; Chew, Siou Teck ; Leong, Mook-Seng ; Ooi, Ban-Leong
Author_Institution :
DSO Nat. Labs., Singapore, Singapore
Abstract :
A miniaturized dual-mode ring bandpass filter at 1.45 GHz with a bandwidth of 6% is demonstrated. The perturbation of the dual modes is realized by a pair of local ground defects. The miniaturization is achieved by loading the peripheral of the ring with the butterfly radial stub structure. A 41% loading factor has been achieved using this method. The simulated and measured results are in good agreement.
Keywords :
Butterworth filters; UHF filters; band-pass filters; circuit simulation; microstrip resonators; 1.45 GHz; Butterworth filters; butterfly radial stub structure; circuit simulation; loading factor; local ground defects; microstrip resonators; miniaturized dual mode ring bandpass filter; perturbation; Antenna measurements; Band pass filters; Bandwidth; Circuit simulation; Design automation; Integrated circuit measurements; Microstrip antennas; Microwave filters; Optical ring resonators; Resonator filters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2004.839928
