Importance

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Abstract

A conical microstrip antenna carried by a frustum of a cone with a half-angle at the apex .alpha., height H.sub.0 and a circular reference line of radius R, includes an annular succession of N radiating patches disposed on the frustum and divided into at least one sub-array of radiating patches connected with equal phase by a respective tree-structure feed array to the same common point, the N radiating patches being made on a dielectric material to resonate in a predetermined frequency band having a center frequency Fo. The tree-structure array is formed of n stages each including dividers of the same order, either the second order or the third order. When developed onto a flat surface, the dividers within the same stage i are made up of an integer number of substantially identical straight line segments with equal angles .gamma.2 between them, the dividers of the same stage approximating arcs of a common circle concentric with the circular arc formed by the circular reference line in the shape developed onto a flat surface.

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First Claim