Title :
Multilayer and anisotropic planar compact PBG structures for microstrip applications
Author :
Caloz, Christophe ; Itoh, Tatsuo
Author_Institution :
Electr. Eng. Dept., California State Univ., Los Angeles, CA, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
Two novel microstrip planar photonic-bandgap (PBG) structures are presented, i.e., a multilayer PBG and an anisotropic PBG. The multilayer PBG, constituted of uniplanar compact (UC) PBGs stacked up below the line, produces huge gaps (> 140 %) through the suppression of parasitic transmission peaks and can achieve a two-fold size reduction with respect to UC-PBGs. The anisotropic PBG is a uniplanar structure exhibiting a propagation direction and an attenuation direction (AD) in a working range of the order of 35%, deep/sharp gaps broader than 65% in the AD, an excellent insensitivity to the line position and an extreme compact size of the order of λ/2 by λ/7
Keywords :
band-pass filters; microstrip filters; microstrip lines; microwave filters; passive filters; periodic structures; photonic band gap; anisotropic PBG; attenuation direction; filtering performance; microstrip planar PBG structures; multilayer PBG; parasitic transmission peaks suppression; planar photonic-bandgap structures; propagation direction; stacked uniplanar compact PBGs; Anisotropic magnetoresistance; Attenuation; Band pass filters; Costs; Cutoff frequency; Insertion loss; Microstrip; Nonhomogeneous media; Optical losses; Power harmonic filters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2002.802338
