Title :
A low sidelobe asymmetric beam antenna for high altitude platform communications
Author_Institution :
Dept. of Electron., Univ. of York, UK
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;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.822566
