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Triangular ray-tube analysis of dielectric lens antennas

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4 Author(s)
Kwok Kee Chan ; Chan Technol. Inc., Kirkland, Que., Canada ; Rao, K.S. ; Morin, G.A. ; Tang, M.Q.

A new method of analysis for the radiation characteristics of dielectric lens antennas with arbitrary inner and outer surfaces is presented. The analysis is based on representing the feed illumination by a contiguous set of ray tubes and including the effects of surface reflections and ray divergence. Radiation patterns and the antenna gain are then computed by evaluating the closed-form expressions developed for the Kirchhoff's integral of the aperture fields. The validity of the analysis method has been demonstrated by comparing the computations with measured results of two different spherical lenses and a shaped lens configurations. The analysis method presented takes into account some of the practical aspects associated with lens design such as surface zoning to reduce the mass and surface matching to minimize the reflection loss

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:45 ,  Issue: 8 )