Title :
Dual-mode tunable filter with simple bandwidth control scheme
Author :
Sun, Jim S. ; Itoh, Tatsuo
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
In this paper, we present the realization of a constant bandwidth two pole tunable filter by means of dual mode resonance. The proposed filter has a simple bandwidth control scheme, making numerical optimization of the bandwidth variation across the tuning range possible. A prototype having tuning range of 0.85~1.4 GHz using lumped inductors as input/output coupling elements has been realized. The bandwidth varies between 51~59 MHz across the tuning range and good matching is achieved within the whole tuning range.
Keywords :
bandwidth allocation; filters; inductors; bandwidth 51 MHz to 59 MHz; bandwidth control; dual mode resonance; dual-mode tunable filter; frequency 0.85 GHz to 1.4 GHz; lumped inductor; Band pass filters; Bandwidth; Diodes; Inductors; Magnetic resonance; Prototypes; Resonator filters; Sun; Topology; Varactors; dual-mode; perturbation; tunable filter;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165742
