An experimental study on 2×2 sequential-rotation arrays with circularly polarized microstrip radiators

Author

Kraft, Ulrich R.

Author_Institution

Daimler-Benz Aerosp. AG-Dornier Satellite Syst., Munich, Germany

Volume

45

Issue

10

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1459

Lastpage

1466

Abstract

The radiation properties of 2×2 sequential-rotation arrays with single-feed circularly polarized patch radiators are investigated experimentally with the goal to maximize the bandwidth for an XPD⩾30 dB. Based on a particular cross-polarization discrimination (XPD) description for such arrays, the impacts of element polarization, mutual coupling, limited symmetry, and excitation errors on the array cross polarization are presented. It is shown that compact configurations can be obtained, which provide an on-axis XPD of 30 dB over up to 2.0% bandwidth and of 35 dB over up to 1.0%. These arrays exhibit copolarized sidelobes below -18 dB and off-axis peak cross-polarization levels below -20 dB

Keywords

antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antenna arrays; bandwidth; circularly polarized microstrip radiators; copolarized sidelobes; cross polarization discrimination; element polarization; excitation errors; experimental study; limited symmetry; mutual coupling; off axis peak cross polarization; radiation properties; sequential-rotation arrays; single-feed patch radiators; Bandwidth; Electromagnetic coupling; Electromagnetic wave polarization; Feeds; Microstrip antenna arrays; Microstrip antennas; Microstrip components; Mutual coupling; Patch antennas; Power dividers;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.633850

Filename

633850