Title :
Microstrip bandpass filters using linear tapered-line resonators with tunable transmission zeros
Author :
Gan, Houle ; Lou, Dongwu ; Yang, Dongxiao
Author_Institution :
Dept. of Inf. & Electron. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
Bandpass filters with tunable transmission zeros and harmonics suppressions are designed using coupled linear tapered-line resonators (LTLR). Tapped lines are used as input and output ports to create and tune two transmission zeros independently, and quarter-wavelength impedance transformers are utilized to ensure the desired quality factors. Measurement results of bandpass filters at 2.4GHz with optimized stopbands are also given to validate the theory.
Keywords :
Q-factor; UHF filters; band-pass filters; harmonics suppression; impedance convertors; microstrip filters; microstrip resonators; 2.4 GHz; harmonics suppression; input ports; linear tapered-line resonators; microstrip bandpass filters; output ports; quality factors; quarter-wavelength impedance transformers; tunable transmission zeros; Band pass filters; Couplings; Filtering theory; Frequency; Impedance; Microstrip filters; Microstrip resonators; Q factor; Resonator filters; Transformers;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606296
