Computer-Aided Bifocal Dielectric Lens Antenna Design for MM Wave Applications,
TELEDYNE/MICRONETICS SAN DIEGO CA
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A Bifocal Dielectric Lens Computer Model has been developed for the aid in the design analysis and performance evaluation for multiple-beam application. This type of lens antenna is very attractive at MN wave region where the feed network loss and size become problems. The model calculates and plots lens contour, the aperture distributions, and the corresponding radiation patterns and gain, with the feed located at any point on the focal arc. Several different approaches in lens contour designs were reported in the past. However an exact analytical solution is yet to come. Despite the lack of a closed-form solution, the Ray Lattice numerical method proposed by Holt and Mayer is very simple and attractive. The two surfaces of lens contour are determined through the ray path length constraints and Snells refraction law.