Title :
A novel microstrip transversal bandpass filter with simultaneous size reduction and spurious responses suppression
Author :
Choi, Wai-Wa ; Tam, Kam-Weng ; Martins, R.P.
Author_Institution :
Fac. of Sci. & Technol., Macau Univ., Macao, China
Abstract :
A novel miniaturized microstrip transversal bandpass filter with simultaneous size reduction and spurious responses suppression is proposed. In this new filter structure, the stepped-impedance resonator technique is used to not only shorten the resonator size but also suppress its spurious responses. A prototype transversal bandpass filter centered at 2 GHz with 5% FBW is designed and experimentally characterized. This new filter achieves 15% size diminution when compared with the conventional structure. In addition, spurious responses at 3 GHz and 5 GHz are suppressed by 30 dB and 18 dB respectively.
Keywords :
UHF filters; band-pass filters; microstrip filters; 2 GHz; 3 GHz; 5 GHz; microstrip transversal bandpass filter; size reduction; spurious responses suppression; stepped-impedance resonator; Band pass filters; Couplings; Filtering theory; Frequency; Impedance; Microstrip filters; Microstrip resonators; Prototypes; Resonator filters; Transversal filters; Size Reduction; Spurious Responses Suppression; Stepped-Impedance; Transversal Filter;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606305
