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US 2002/0158798 A1Published application
High gain planar scanned antenna array
AssigneeTantivy Communications, Inc.
InventorsBing Chiang, Griffin K. Gothard, Christopher A. Snyder, Kenneth M. Gainey
Life of this patent
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Abstract
An antenna array having a central active element and a plurality of passive elements surrounding the active element is disclosed. A dielectric substrate or other slow wave structure is disposed radially outwardly from the passive elements for slowing the radio frequency waves so as to increase the antenna directivity by reducing the amount of energy radiated in the elevation direction.
Claims34
An antenna comprising:
- an active element;
- a plurality of passive elements spaced apart from and circumscribing said active element;
- and
- a dielectric substrate surrounding said active element and said plurality of passive elements such that the radio frequency wave emitted by said active element in the transmitting mode or received by said active element in the receiving mode contacts said dielectric substrate thereby affecting the radiation beam pattern of said active element.
1 more element
An antenna comprising:
- an active element;
- a plurality of passive elements spaced apart from said active element and arranged in a circle wherein said active element is at the center thereof;
- a dielectric substrate in the shape of a ring including a circular band defining an interior aperture;
- wherein said antenna is operated in a first mode when said dielectric substrate is oriented such that said plurality of passive elements and said active element are disposed within the interior aperture;
- and
- wherein said antenna operates in a second mode when said dielectric substrate is absent.
3 more elements
An antenna comprising:
- an active element;
- a plurality of parasitic elements spaced apart from and circumscribing said active element;
- and
- a plurality of passive elements spaced between said active element and said plurality of parasitic elements.
1 more element
An antenna comprising:
- an active element;
- a plurality of passive elements spaced apart from said active element;
- and
- a structure in the shape of a ring including a central aperture, said structure oriented such that said plurality of passive elements are disposed within the central aperture, wherein said structure further includes a plurality of concentric mesas defining a plurality of concentric grooves there between.
1 more element
An antenna comprising:
- an active element;
- a ground plane proximate the base of said active element;
- a plurality of vertical parasitic elements spaced apart from said active element;
- a plurality of passive elements spaced between said active element and said plurality of parasitic elements;
- a dielectric substrate;
- and
- wherein one of said plurality of passive elements and at least one of said plurality of parasitic elements are disposed on said dielectric substrate, and wherein said dielectric substrate is vertically affixed to said ground plane, and wherein said at least one parasitic element vertically affixed to said dielectric substrate is shorted to said ground plane.
4 more elements
Dependencies are inferred from the claim text.