Title :
High-selectivity tunable bandpass filters with low insertion loss
Author :
Hasegawa, Kohei ; Ishida, Hitoshi
Author_Institution :
Adv. Production Syst. Eng. Course, Gunma Nat. Coll. of Technol., Maebashi, Japan
Abstract :
This paper presents a varactor-tuned tunable bandpass filter (TBPF) with two movable transmission zeros. The TBPF consists of a pair of frequency-tunable shunt resonant circuits at upper and lower side of the passband frequency. Varactors loaded at the gap of hairpin resonator. The equation for the transmission zeros are derived from the analysis of a transmission line. The TBPF is designed and tested at 2GHz. The theoretical analysis and design procedures have been successfully verified by experiments.
Keywords :
band-pass filters; circuit resonance; circuit tuning; resonators; transmission lines; varactors; frequency 2 GHz; frequency-tunable shunt resonant circuit; hairpin resonator; high-selectivity tunable bandpass filter; low insertion loss; movable transmission zero; passband frequency; transmission line; varactor-tuned tunable bandpass filter; Capacitance; Electronic mail; Equations; Varactors; Bandpass Filters; Capacitors; Tunable Filters; Varactors;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
