Title :
Mechanically Steered Lens Antennas for 45GHz High Datarate Airliner-Ground Link
Author :
Gray, Derek ; Thornton, John ; Tsuji, Hiroyuki
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Koganei
fDate :
Nov. 30 2008-Dec. 4 2008
Abstract :
A mechanically steered hemispherical lens antenna was investigated using the commercially available MOM software FEKOTM to meet a requirement for a low weight and low cost mm-wave transmit antenna for installation onboard a large passenger aircraft. Hemispherical homogeneous lenses of relative permittivity 2.5 and 4 wavelength radius were found to meet the 26.5 dBic gain specification across 75deg elevation scan range. Distorting the circular reflecting plate under the hemispherical lens to an elliptical shape was found to increase the elevation scan range to 105deg, satisfying the scan requirement. Similar results were obtained with a relative permittivity 1.7 lens, when fed by a near field focused horn antenna. The advantage of the latter design is 40% reduction in mass of the lens.
Keywords :
aircraft antennas; horn antennas; lens antennas; millimetre wave antennas; airliner-ground link; frequency 45 GHz; hemispherical homogeneous lenses; hemispherical lens antenna; large passenger aircraft; mechanically steered lens antennas; relative permittivity; transmit antenna; Aircraft; Antenna feeds; Aperture antennas; Bandwidth; Costs; Lenses; Optical design; Permittivity; Satellite broadcasting; Transmitting antennas;
Conference_Titel :
GLOBECOM Workshops, 2008 IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-3061-1
Electronic_ISBN :
978-1-4244-3062-8
DOI :
10.1109/GLOCOMW.2008.ECP.9
