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Surface-wave luneberg lens antennas

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1 Author(s)
Walter, C.H. ; The Ohio State University, Columbus, OH, USA

It is demonstrated that a surface-wave structure having isotropy in the plane of the structure can be operated as a lens. The index of refraction is given for a dielectric slab on a ground plane, a bed of metal posts on a ground plane and a parallel-plate structure with one plate filled with holes. The necessary radial variations in index for several Luneberg-type lenses are given. These include the conventional Luneberg lens, Gutman's modification, the rim-fed Luneberg adapted to a spherical surface and a modification adapted to a spherical surface and collimation of the rays at an arbitrary angle with respect to the plane on which the lens is mounted. An approximate analysis of surface-wave lenses based on optics is described.

Published in:

Antennas and Propagation, IRE Transactions on  (Volume:8 ,  Issue: 5 )