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Multilayer and anisotropic planar compact PBG structures for microstrip applications

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2 Author(s)
Caloz, C. ; Electr. Eng. Dept., California State Univ., Los Angeles, CA, USA ; Itoh, T.

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

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:50 ,  Issue: 9 )