Title :
Compact tri-band bandpass filter using stub-loaded resonator and quarter-wavelength resonator
Author :
Doan, MinhTan ; Che, Wenquan ; Deng, Kuan ; Feng, Wenjie
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
A novel compact microstrip tri-band bandpass filter (BPF) using stub-loaded resonator and λ/4 resonator are proposed in this paper. Three passbands are designed to operate at 1.8/2.4/3 GHz, respectively. The stub-loaded resonators are used to generate the first and third passbands, while the λ/4 resonator is used to generate the second passband. The center frequencies of three passband for the tri-band BPF can be conveniently tuned to desired values. One set of resonators are embedded inside the other and thus causing compact size for the filter. A prototype of tri-band bandpass filter is designed and fabricated for demonstration, indicating good agreement with the theoretical expectation.
Keywords :
band-pass filters; microstrip filters; resonator filters; compact microstrip triband bandpass filter; frequency 1.8 GHz; frequency 2.4 GHz; frequency 3 GHz; quarter-wavelength resonator; stub-loaded resonator; Band pass filters; Bandwidth; Couplings; Optical resonators; Passband; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave Conference Proceedings (CJMW), 2011 China-Japan Joint
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-0625-7
Electronic_ISBN :
978-7-308-08555-7
