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

Author

García-Vigueras, María ; Gómez-Tornero, José Luis ; Goussetis, George ; Weily, Andrew R. ; Guo, Y. Jay

Author_Institution

Dept. of Commun. & Inf. Technol., Tech. Univ. of Cartagena, Cartagena, Spain

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

7

Lastpage

10

Abstract

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.

Keywords

leaky wave antennas; microwave antennas; rectangular waveguides; HIS; LWA; beam-scanning response; frequency 11 GHz to 16 GHz; frequency-scanning response; frequency-scanning sensitivity; high-impedance surfaces; hollow-leaky wave antennas; hollow-rectangular waveguide; metallodielectric HIS; partially-reflective surface; simple-transverse equivalent network; Bandwidth; Dispersion; Frequency measurement; Hollow waveguides; Rectangular waveguides; Resonant frequency; Sensitivity; Frequency beam scanning; high-impedance surfaces (HISs); leaky-wave antennas (LWAs);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2107492

Filename

5699332