Importance

Loading Importance Indicators...

Abstract

A constant E-plane beamwidth antenna (10), includes a rectangular feeder (12) communicating with a partly cylindrical sectoral horn (14) via a transition (30) positioned in the throat of the sectoral horn. The transition (30) has a plurality of electrically conductive partitions (32) positioned perpendicular to the electric field of a mode propagating, in use, in the sectoral horn (14). The disposition of the electrically conducting partitions is arranged to transport modes which have a constant plane across the surface on one side of the transition into modes which have a constant phase across the surface on the other side of the transition. The transition (30) may be used to control the E-plane beamwidth of an H-plane constant beamwidth horn. Optionally the spaces between the electrically conductive partitions (32) may be filled with a low loss dielectric material.

Loading the Abstract Image...

First Claim