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Dielectric cone loaded horn antennas

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3 Author(s)
Olver, A.D. ; Dept. of Electr. & Electron. Eng., Queen Mary Coll., London, UK ; Clarricoats, P.J.B. ; Raghavan, K.

The radiation characteristics of conical horns loaded with dielectric cones are investigated. The horn radiates low cross-polarisation over a wide band of frequencies with cones made of foam or solid dielectrics. They make high performance feeds for reflector antennas. A modal-matching technique is used to investigate the behaviour of the higher order modes excited along the horn that influence the radiated cross-polarisation. A parametric study is described to assess the influence of the aperture and cone diameters, the flare angle, and the permittivity of the dielectric.

Published in:

Microwaves, Antennas and Propagation, IEE Proceedings H  (Volume:135 ,  Issue: 3 )