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.
Original language | English |
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Pages (from-to) | e21036 |
Journal | International Journal of RF and Microwave Computer-Aided Engineering |
Volume | 27 |
Issue number | 1 |
Early online date | 1 Sept 2016 |
DOIs | |
Publication status | Published - Jan 2017 |
Keywords
- lens antennas
- waveguide feeds
- satellite communications