Title :
Coplanar waveguide periodic structures with resonant elements and their application in microwave filters
Author :
Karyamapudi, B.M. ; Jia-Sheng Hong
Author_Institution :
Dept. of Electr., Electron. & Comput. Eng., Heriot-Watt Univ., Edinburgh, UK
Abstract :
Coplanar waveguide (CPW) periodic structures with resonant elements on the ground plane have been investigated for lowpass and bandstop filter applications. The resonator is constructed by etching out radial shapes on the ground plane. The use of resonant elements allows larger attenuation in the stop band to be obtained with less number of periodic structures as compared with conventional photonic bandgap (PBG) structures. A theoretical study of this type of periodic structure has revealed some useful information for designing filters. Two filters of this type, one for lowpass application and the other for bandstop application have been designed, fabricated and tested. The results are presented.
Keywords :
band-stop filters; coplanar waveguide components; low-pass filters; microwave filters; periodic structures; photonic band gap; resonator filters; waveguide filters; CPW structures; PBG structures; bandstop filters; coplanar waveguide periodic structure resonant elements; ground plane etched radial shapes; ground plane resonant elements; lowpass filters; microwave filters; photonic bandgap structures; stop band attenuation; Attenuation; Coplanar waveguides; Etching; Microwave filters; Periodic structures; Photonic band gap; Planar waveguides; Resonance; Resonator filters; Shape;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210448
