Title :
High Performance Wide Stopband Lowpass Filter Using Complementary Split Ring Resonators as Defected Ground Plane
Author :
Kunwer, Ajay Kumar ; Pal, Srikanta
Author_Institution :
Dept of Electron. & Commun. Eng., Birla Inst. of Technol., Ranchi, India
Abstract :
A novel design of a wide stopband, microstrip technology based low pass filter using defected ground plane is reported in this paper. The filter structure has varied dimensions of periodic complementary square split ring resonator (CSSRR) in the ground plane. The periodic arrangement of non-uniformly spaced CSSRR units in the defected ground structure (DGS) provides sharp cutoff frequency and wide stopband behavior. The optimized design has stop bandwidth (2 to 8 GHz) around four times the cutoff frequency. Improvement in stop bandwidth of CSSRR based design is compared with that of the square-split-ring-resonator (SSRR) and non-uniformly Dumbbell shaped DGS resonator based design. An improved Slow-wave factor is found as compared to Dumbbell shaped DGS.
Keywords :
UHF resonators; defected ground structures; low-pass filters; microstrip filters; microstrip resonators; CSSRR based design; ground plane defect; ground structure defect; high performance wide stopband low pass filter; nonuniformly Dumbbell shaped DGS resonator based design; nonuniformly spaced CSSRR unit; periodic complementary square split ring resonator; sharp cutoff frequency; slow wave factor; Attenuation; Microstrip filters; Microwave amplifiers; Microwave filters; Periodic structures; Resonator filters; Scattering parameters;
Conference_Titel :
Devices and Communications (ICDeCom), 2011 International Conference on
Conference_Location :
Mesra
Print_ISBN :
978-1-4244-9189-6
DOI :
10.1109/ICDECOM.2011.5738500
