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Enhancing Frequency-Scanning Response of Leaky-Wave Antennas Using High-Impedance Surfaces

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5 Author(s)
Garcia-Vigueras, M. ; Dept. of Commun. & Inf. Technol., Tech. Univ. of Cartagena, Cartagena, Spain ; Gomez-Tornero, J.L. ; Goussetis, G. ; Weily, A.R.
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The use of high-impedance surfaces (HISs) to increase the frequency-scanning sensitivity of hollow leaky-wave antennas (LWAs) is presented. The LWA consists of a hollow rectangular waveguide with one of its narrow walls replaced by a partially reflective surface, and it is loaded with a metallodielectric HIS to increase its beam-scanning response. Theoretical results based on a simple transverse equivalent network illustrate the physical mechanism responsible for the improvement, and they are verified by experiments on a prototype working in the 11-16 GHz band.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:10 )