Title :
Compact tunable dual-band filter with mixed coupling
Author :
Chuan Gai ; Xiao-Wei Zhu ; Wei Hong
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
This paper presents the design of novel tunable dual-band filter with a compact mixed coupling scheme. The two passband can be tuned simultaneously with the absolute bandwidth of first passband invariable. Theoretical analysis indicates that it is able to achieve desired coupling coefficients between the proposed resonators. For demonstration, a tunable dual-band filter covering 1 GHz-1.35GHz and 2.5GHz-3.4GHz is implemented with 90 MHz constant absolute bandwidth of first passband. Experimental results agree with theoretical and simulated predications excellently.
Keywords :
band-pass filters; microwave filters; resonator filters; bandwidth 1 GHz to 1.35 GHz; bandwidth 2.5 GHz to 3.4 GHz; compact mixed coupling scheme; compact tunable filter; constant absolute bandwidth; dual-band filter; Band-pass filters; Bandwidth; Couplings; Dual band; Microwave filters; Passband; Resonator filters; Tunable filter; constant absolute bandwidth; dual-band; mixed coupling;
Conference_Titel :
Microwaves, Radar, and Wireless Communication (MIKON), 2014 20th International Conference on
Conference_Location :
Gdansk
Print_ISBN :
978-617-607-553-0
DOI :
10.1109/MIKON.2014.6899871
