Multimode omniantenna with flush mount
AssigneeHazeltine Corporation
InventorPeter W. Hannan
Life of this patent
Estimating the term…
Abstract
A central aperture provides at least two radiation pattern modes. A second aperture concentric with the central aperture provides at least two radiation pattern modes. A first feed system excites the central aperture and a second feed system excites the concentric aperture. Circuit means associated with the second feed system provides an auxiliary excitation to the concentric aperture which results in optimizing the radiation pattern obtained during excitation of the central aperture.
Claims29
A flush mounted, multimode antenna system using a plurality of apertures, said system comprising:
- (a) first aperture means, for providing at least two radiation pattern modes;
- (b) second aperture means, concentric with said first aperture means, for and providing at least two radiation pattern modes;
- (c) first feed system for exciting said first means;
- (d) second feed system for exciting said second means;
- and
- (e) circuit means associated with said second feed system, for providing an auxiliary excitation to said second aperture means resulting in an optimized radiation pattern obtained during excitation of the first aperture means.
A flush mounted, multimode antenna system having a plurality of apertures located in an aperture surface, said system comprising:
- (a) a central first aperture providing first and second radiation pattern modes which are respectively right hand and left hand circularly polarized in a radiation direction perpendicular to the aperture surface;
- (b) a concentric second aperture surrounding said first aperture and providing first, second and third radiation pattern modes that are respectively an omni directional pattern that is vertically polarized in a radiation direction parallel to the aperture surface and two other modes having radiation patterns which are respectively right and left hand circularly polarized in a radiation direction perpendicular to the aperture surface;
- (c) a first feed system connected to and exciting said first aperture;
- (d) a second feed system connected to and exciting said second aperture;
- and
- (e) a circuit means connected to said second feed system to provide an auxiliary excitation to the second aperture resulting in optimized, vertically polarized radiation in the radiation direction parallel to the aperture surface during excitation of the first or second radiation pattern modes of the first aperture.
Dependencies are inferred from the claim text.