A Printed Leaky-Wave Antenna Based on a Sinusoidally-Modulated Reactance Surface

Author

Patel, Amit M. ; Grbic, Anthony

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan-Ann Arbor, Ann Arbor, MI, USA

Volume

59

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

2087

Lastpage

2096

Abstract

A simple procedure for designing a sinusoidally-modulated reactance surface (SMRS) that radiates at an arbitrary off-broadside angle is outlined. The procedure allows for nearly independent control of the leakage and phase constants along the surface. Printing an array of metallic strips over a grounded dielectric substrate is discussed as a way to practically implement the theoretical SMRS. A method of mapping the gaps between metallic strips to a desired surface impedance is presented as an efficient alternative to mapping methods used in the past. A printed leaky-wave antenna with a sinusoidally-modulated surface reactance is designed using the procedure mentioned above. The TM-polarized antenna radiates at 30° from broadside at 10 GHz, and exhibits an experimental gain of 18.4 dB. Theoretical, simulated, and experimental results are presented.

Keywords

leaky wave antennas; microstrip antennas; polarisation; surface impedance; SMRS; TM polarized antenna; frequency 10 GHz; gain 18.4 dB; grounded dielectric substrate; leakage constants; metallic strips; phase constants; printed leaky wave antenna; sinusoidally modulated reactance surface; surface impedance; Harmonic analysis; Impedance; Leaky wave antennas; Modulation; Surface impedance; Surface waves; Leaky wave antennas; leaky waves; microstrip antennas; periodic structures; surface waves;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2011.2143668

Filename

5752223