Title :
Uniplanar one-dimensional photonic-bandgap structures and resonators
Author :
Yun, Tae-Yeoul ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
This paper presents uniplanar one-dimensional (1-D) periodical structures, so-called photonic-bandgap (PBG) structures, and defect high-Q resonators for coplanar waveguide, coplanar strip line, and slot line. Proposed uniplanar PBG structures consist of 1-D periodically etched slots along a transmission line or alternating characteristic impedance series with wide band-stop filter characteristics. A stop bandwidth obtained is 2.8 GHz with a stopband rejection of 36.5 dB. This PBG performance can be easily improved if the number of cells or the filling factor is modified in a parametric analysis. Using uniplanar 1-D PBG structures, we demonstrate new high-Q defect resonators with full-wave simulation and measured results. These structures based on defect cavity or Fabry-Perot resonators consist of a center resonant line with two sides of PBG reflectors. They achieve a loaded Q of 247.3 and unloaded Q of 299.1. The proposed circuits should have many applications in monolithic and hybrid microwave integrated circuits
Keywords :
Fabry-Perot resonators; Q-factor; band-stop filters; coplanar waveguides; microwave integrated circuits; microwave photonics; photonic band gap; slot lines; 1D periodically etched slots; 2.8 GHz; Fabry-Perot resonators; alternating characteristic impedance series; band-stop filter characteristics; center resonant line; coplanar strip line; coplanar waveguide; defect cavity resonators; defect high-Q resonators; filling factor; full-wave simulation; loaded Q; microwave integrated circuits; parametric analysis; slot line; stop bandwidth; uniplanar one-dimensional photonic-bandgap structures; unloaded Q; Bandwidth; Circuit simulation; Coplanar transmission lines; Coplanar waveguides; Etching; Filling; Impedance; Performance analysis; Resonator filters; Strips;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on