Wideband Beam-Scanning Circularly Polarized Inclined Slots Using Ridge Gap Waveguide

Author

Al Sharkawy, Mohamed ; Kishk, Ahmed A.

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada

Volume

13

fYear

2014

fDate

2014

Firstpage

1187

Lastpage

1190

Abstract

A wideband circularly polarized (CP) frequency-dependent slot antenna array is designed for beam scanning using the ridge gap waveguide (RGW) technology. The merge between both the printed and the RGW technologies for providing a wideband CP antenna array is newly implemented here. The designed CP antenna has been fabricated, and measurement results are provided and compared to the full-wave analysis. A measured antenna axial ratio (AR) and impedance bandwidths of ~ 21% are achieved from 12.5 to 15.5 GHz. The proposed antenna preserves its CP characteristics of AR below 3 dB while achieving continuous frequency beam scanning from backward to forward directions including broadside radiation that covers +15° to -15° with an average gain of 12.5 dBi.

Keywords

antenna radiation patterns; broadband antennas; microwave antenna arrays; ridge waveguides; slot antenna arrays; RGW technology; antenna axial ratio; impedance bandwidths; ridge gap waveguide technology; wideband CP antenna array; wideband beam-scanning circularly polarized inclined slots; wideband circularly polarized frequency-dependent slot antenna array; Antenna arrays; Antenna measurements; Arrays; Frequency measurement; Gain; Slot antennas; Waveguide discontinuities; Beam scanning; circularly polarized; ridge gap waveguide (RGW); slots array;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2331679

Filename

6838980