Title :
Compact, broad-stopband elliptic-function lowpass filters using microstrip stepped impedance hairpin resonators
Author :
Lung-Hwa Hsieh ; Kai Chang
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A compact elliptic-function lowpass filter is developed. Multiple cascaded microstrip hairpin resonators operated at different 3-dB cutoff frequencies are used to design the filter. The filters are evaluated by experiment and simulation with good agreement. The return loss is better than 12.84 dB from DC to 0.81 GHz. The insertion loss is less than 0.5 dB. The rejection is greater than 35.7 dB from 1.5 to 10 GHz. This compact, low loss, sharp cutoff frequency response, and broad stopband lowpass filter should be useful in many wireless communication systems.
Keywords :
elliptic filters; losses; low-pass filters; microstrip filters; microstrip resonators; 0 to 0.81 GHz; 1.5 to 10 GHz; 12.84 dB; 3-dB cutoff frequencies; broad-stopband filters; elliptic-function lowpass filters; insertion loss; microstrip stepped impedance hairpin resonators; return loss; wireless communication systems; Capacitance; Cutoff frequency; Equivalent circuits; Fabrication; Impedance; Insertion loss; Microstrip filters; Microstrip resonators; Resonator filters; Transmission line matrix methods;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210484
