Conical microstrip antenna prepared on flat substrate and method

Details Conical microstrip antenna prepared on flat substrate and method Conical microstrip antenna prepared on flat substrate and method

1994-12-23

1997-02-04

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Microstrip

343853, H01Q 138

Patent

active

056003315

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.

REFERENCES:
patent: 4101895 (1978-07-01), Jones
patent: 4160976 (1979-07-01), Conroy
patent: 4605932 (1986-08-01), Butscher et al.
patent: 4816836 (1989-03-01), Lalezari
Toute L'Electronique, No. 548, Nov. 1989, Paris, France, pp. 18-22; J. P. Daniel et al, "Conception et Realisation de Reseaux d'antennes Imprimees".

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