Title :
A compact low-loss tunable filter with mixed electric and magnetic coupling
Author :
Chuan Ge ; Xiao-Wei Zhu
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
This paper presents the design of novel tunable bandpass filter with constant absolute bandwidth. A novel mixed electric and magnetic coupling scheme is utilized. Theoretical analysis indicates that it is able to achieve desired coupling coefficients between the proposed resonators. For demonstration, a high Q tunable filter is implemented with 105 MHz constant absolute bandwidth. Experimental results agree with theoretical and simulated predications excellently.
Keywords :
Q-factor; band-pass filters; resonator filters; bandpass filter; bandwidth 105 MHz; compact low-loss tunable filter; constant absolute bandwidth; electric coupling scheme; high Q filter; magnetic coupling scheme; Band pass filters; Bandwidth; Couplings; Filtering theory; Insertion loss; Magnetic separation; Resonator filters; constant absolute bandwidth; high quality factor; mixed coupling; tunable filter;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421648
