Title :
A Microstrip SIR Dual-Mode Bandpass Filter with Simultaneous Size Reduction and Spurious Responses Suppression
Author :
Choi, Wai-Wa ; Tam, Kam-Weng
Author_Institution :
Wireless Commun. Lab., Univ. of Macau, Macao
Abstract :
A novel miniaturized microstrip dual-mode bandpass filter with simultaneous size reduction and spurious responses suppression is proposed. In this new filter structure, the stepped-impedance resonator (SIR) technique is used to not only shorten the resonator size but also suppress its spurious responses. A prototype dual-mode bandpass filter centered at 1.6 GHz with 3% FBW is designed and experimentally characterized. This new filter achieves 33% size diminution when compared with the conventional structure. In addition, spurious responses at 2f0 and 3f0 are suppressed by 20 dB and 18 dB respectively.
Keywords :
band-pass filters; microstrip filters; resonator filters; frequency 1.6 GHz; miniaturized microstrip dual-mode bandpass filter; size reduction; spurious response suppression; stepped-impedance resonator; Arm; Band pass filters; Conferences; Filtering theory; Impedance; Microstrip components; Microstrip filters; Microstrip resonators; Microwave Theory and Techniques Society; Resonator filters; Dual-Mode Filter; Size Reduction; Spurious Responses Suppression; Stepped-Impedance;
Conference_Titel :
Art of Miniaturizing RF and Microwave Passive Components, 2008. IMWS 2008. IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2876-2
Electronic_ISBN :
978-1-4244-2877-9
DOI :
10.1109/IMWS.2008.4782276
