Title :
Microstrip multistage coupled ring bandpass filters using photonic bandgap structures for harmonic suppression
Author :
Griol, A. ; Mira, D. ; Martin, J. ; Marti, Joan ; Corral, Juan Luis
Author_Institution :
ITACA Res. Inst., Univ. Politecnica de Valencia, Spain
Abstract :
Microwave bandpass filters based on microstrip coupled ring resonators including photonic bandgap (PBG) structures to suppress higher harmonics have been investigated. Two topologies based on placing PBG structures into and out of the coupled rings have been considered. A harmonic suppression ratio greater than 20 dB in a flat bandpass filter centred at 2.25 GHz is achieved for both structures.
Keywords :
band-pass filters; harmonics suppression; microstrip filters; photonic band gap; 2.25 GHz; harmonic suppression; microstrip coupled ring resonators; microwave bandpass filter; photonic bandgap structure;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030022
