This letter presents a planar dual-band bandpass filter (BPF) of adjustable bandwidths. The proposed method of simultaneously designing the J-inverters and the resonators enables a BPF to have bandwidth control, without any structural modification to the uniform coupled lines loaded with shunt stubs. A systematic design approach is introduced along with experimental results that verify the proposed method.
Bibliographical noteFunding Information:
Manuscript received January 28, 2010; revised April 09, 2010, May 31, 2010, and July 16, 2010; accepted August 02, 2010. Date of publication September 07, 2010; date of current version October 06, 2010. This work was supported by the MEMS Research Center for National Defense funded by Defense Acquisition Program Administration and also by the KCC (Korea Communications Commission) under the CPRC program supervised by the IITA (Institute for Information Technology Advancement) (IITA-2009-C1091-0901-0007).
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering