A low sidelobe asymmetric beam antenna for high altitude platform communications

Author

Thornton, John

Author_Institution

Dept. of Electron., Univ. of York, UK

Volume

14

Issue

2

fYear

2004

Firstpage

59

Lastpage

61

Abstract

In a communications network served by a high altitude platform, the antenna beams illuminating each cell require minimized sidelobe powers. Asymmetric beams are advantageous so that cell footprints remain circular. At millimeter wavelengths a lens antenna can have the desired properties. We have chosen a 6 km diameter cell at 32° elevation angle and shown how the required beam asymmetry can be implemented using an optimized polynomial for describing the lens profile. The measured average sidelobe level is below -42 dB.

Keywords

aircraft antennas; aircraft communication; antenna radiation patterns; lens antennas; millimetre wave antennas; shaped beam antennas; antenna beams; cell footprints; communications network; high altitude platform communications; lens antenna; lens profile; low sidelobe asymmetric beam antenna; millimeter wavelengths; minimized sidelobe powers; optimized polynomial; Antenna measurements; Apertures; Communication networks; Directional antennas; Feeds; Land mobile radio cellular systems; Lenses; Microwave antennas; Millimeter wave measurements; Polynomials;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2003.822566

Filename

1268097