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Closely coupled triple layer hybrid FSS/EBG for increased directivity
Author(s) -
Davies Ryan W.,
Morrow Ivor L.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22387
Subject(s) - directivity , reflector (photography) , metamaterial , reflection (computer programming) , optics , microwave , filter (signal processing) , antenna (radio) , acoustics , tunable metamaterials , frequency band , materials science , physics , optoelectronics , engineering , electrical engineering , computer science , telecommunications , light source , programming language
A novel frequency selective surface (FSS)/electromagnetic bandgap material (EBG) is presented, which operates as a spectral (frequency domain) and spatial/directional filter. The filter antenna filter (FAF) is shown to increase directivity of a compact EBG monopole antenna in simulation and measurement, resulting in a gain of 15 dB. The FAF can achieve a filtering response equivalent to multiple stacked λ/4 separated FSSs with a triple layer tightly coupled (0.16λ electrical length) surface. Its reflection phase properties exhibit those of an EBG material in its operating frequency making it possible to integrate closely to a radiating source and its reflector. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1125–1128, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI.10.1002/mop.22387