Feed and loss effects in spherical lens antennas for satellite communications

Thornton, John and Smith, Dave (2017) Feed and loss effects in spherical lens antennas for satellite communications. International Journal of RF and Microwave Computer-Aided Engineering, 27 (1). e21036. ISSN 1096-4290

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Abstract

The hemispherical lens antenna is a candidate for satellite communications-on-the-move, offering good scan performance in a reduced height. A short focal length minimizes height but presents challenges in illuminating the lens. Aperture efficiency is dominated by both the primary feed and dielectric loss. Feed effects are investigated in a threefold approach: spherical wave theory, commercial solver, and measurements. Gain and loss in a 432 mm diameter polyethylene/polystyrene lens are also measured. Gain for a waveguide-fed array of two lenses is 36.3, 38.8, and 41.1 dBi, respectively, at 12.5, 20, and 30 GHz. The performance of a proposed four-element array of equivalent area is then estimated.

Item Type:	Article
Uncontrolled Keywords:	lens antennas; waveguide feeds; satellite communications
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	23 Feb 2017 09:38
Last Modified:	12 Oct 2019 19:21
URI:	http://nrl.northumbria.ac.uk/id/eprint/29853

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