Title :
Broadband substrate integrated waveguide filters with defected ground structure
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper presents a scheme for designing broadband filters based on the substrate integrated waveguide (SIW) cavity with defected ground structures (DGS).The proposed DGS split-ring resonator (SRR) is developed from micro-strip SRR. Through the cross coupling resonator with source-load coupling, a compact broadband filter with three transmission zeros in the stop-band is realized and measured. According to the test, such filter has a 27% fractional bandwidth with 26.6GHz center frequency. Furthermore, another broadband filter based on this method is illustrated and simulated to suppress the nearby spurious band by double SIW cavities.
Keywords :
cavity resonator filters; defected ground structures; microstrip filters; microwave filters; substrate integrated waveguides; waveguide filters; DGS split-ring resonator; SIW cavity filter; broadband substrate integrated waveguide filters; cross-coupling resonator; defected ground structure; double SIW cavities; frequency 26.6 GHz; microstrip SRR; source-load coupling; spurious band suppression; transmission zeros; Broadband communication; Cavity resonators; Couplings; Filtering theory; Microwave filters; Resonator filters; Substrates; DGS; SIW; broadband; cross-coupling; filter;
Conference_Titel :
Computational Problem-Solving (ICCP), 2012 International Conference on
Conference_Location :
Leshan
Print_ISBN :
978-1-4673-1696-5
Electronic_ISBN :
978-1-4673-1695-8
DOI :
10.1109/ICCPS.2012.6384252
