Beam-Squinting Reduction of Leaky-Wave Antennas Using Huygens Metasurfaces

Author

Mehdipour, Aidin ; Wong, Joseph W. ; Eleftheriades, George V.

Author_Institution

Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada

Volume

63

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

978

Lastpage

992

Abstract

A novel approach is presented to reduce the beam squinting of radiating structures with emphasis on leaky-wave antennas (LWAs). This is achieved by taking advantage of the interesting frequency-dependent variation of the generalized law of refraction in metasurfaces, in combination with the beam-squinting characteristics of LWAs dictated by their dispersion diagram. An X-band coplanar waveguide leaky-wave antenna (CPW-LWA) and a Huygens metasurface are fabricated and experimental results verify that the proposed concept can reduce the beam squinting of the LWA by 50% over a 10% bandwidth at angles around broadside. The proposed method is shown to be an excellent approach to build simple, low-profile, and lowcost communication systems composed of LWAs with low beam-squinting characteristics over a reasonably wide frequency range.

Keywords

coplanar waveguides; electromagnetic metamaterials; leaky wave antennas; microwave antennas; CPW-LWA; Huygens metasurfaces; X-band coplanar waveguide leaky-wave antenna; beam squinting reduction; dispersion diagram; frequency-dependent variation; generalized refraction law; radiating structures; Antenna arrays; Arrays; Bandwidth; Dispersion; Leaky wave antennas; Magnetic resonance; Phase shifters; Beam squinting; Huygens sources; frequency scanning; generalized law of refraction; leaky-wave antennas; leaky-wave antennas (LWAs); metamaterials; metasurfaces;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2389240

Filename

7004812