Title :
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
fDate :
7/3/1905 12:00:00 AM
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);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2107492
