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Low‐profile frequency agile directive antenna based on an active metasurface
Author(s) -
Burokur Shah Nawaz,
Daniel JeanPierre,
Ratajczak Philippe,
de Lustrac André
Publication year - 2011
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.26290
Subject(s) - directivity , metamaterial , microstrip antenna , materials science , broadband , patch antenna , microwave , antenna (radio) , microstrip , wideband , resonance (particle physics) , optoelectronics , optics , capacitive sensing , electrical engineering , engineering , physics , telecommunications , particle physics
The modeling and characterization of a broadband frequency agile metamaterial‐based cavity antenna around 2 GHz is reported in this article.An electronically active metasurface composed of simultaneously a capacitive and an inductive grid is used as a partially reflecting surface (PRS), and the cavity is excited by an array of four wideband L‐strip fed printed microstrip patch antennas. The incorporation of variable capacitance in the metasurface helps to tune the resonance frequency and the phase characteristics. Measurements performed on a fabricated prototype present a reconfigurable resonance frequency between 1.9 and 2.31 GHz and a directivity of 18 dBi for a low profile cavity thickness of λ/10 at 2 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2291–2295, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26290