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US 5,212,494 AGranted
Compact multi-polarized broadband antenna
AssigneeTexas Instruments Incorporated
InventorsDean A. Hofer, Oren B. Kesler, Lowell L. Loyet
Life of this patent
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Abstract
The disclosure relates to a multipolarized broad band antenna and antenna system wherein the antenna structure is formed on a substrate, the antenna structure on the substrate including a central feedpoint, a first antenna element having a plurality of regions composed of first plural interconnected concentric sectors of circles of diminishing radius extending to the feedpoint, and a second antenna element having a plurality of regions composed of second plural interconnected concentric sectors of circles of diminishing radius extending to the feedpoint, the second plural concentric sectors being interleaved with the first plural concentric sectors.
Claims40
A multi-polarized broad band antenna which comprises:
- (a) a substrate;
- and
- (b) an antenna structure disposed on said substrate, said antenna structure including:
- (c) a central feedpoint;
- (d) first and second spaced apart signal injection/extraction connections disposed remote from said central feedpoint at the outer perimeter of said antenna structure;
- (e) a first radial transmission line extending from said central feed point to said first signal injection/extraction connection at said outer perimeter of said antenna;
- (f) a first antenna element having a plurality of elements defined by electrically conductive interconnected concentric circular sectors of diminishing radius extending from said outer antenna perimeter to said central feedpoint;
- (g) a second antenna element having a plurality of elements defined by electrically conductive interconnected concentric circular sectors of diminishing radius extending from said outer antenna perimeter to said central feedpoint, said second plural circular sectors being interleaved with said first plural circular sectors;
- (h) a second radial transmission line rotated ninety degrees from said first transmission line and extending from said central feedpoint to said second signal injection/extraction connection at said antenna perimeter;
- (i) a third antenna element having a plurality of elements defined by electrically conductive interconnected concentric circular sectors of diminishing radius extending from said outer antenna perimeter to said central feedpoint, said third plural circular sectors being interleaved with said second plural circular sectors;
- (j) a third radial transmission line rotated ninety degrees from said second transmission line and extending from said central feedpoint to said antenna perimeter and disposed opposite said first transmission lines;
- (k) a fourth antenna element having a plurality of elements defined by electrically conductive interconnected concentric circular sectors of diminishing radius extending from said outer antenna perimeter to said central feedpoint, said fourth plural circular sectors being interleaved with said first and third plural circular sectors;
- (l) a fourth radial transmission line rotated ninety degrees from said third transmission line and extending from said central feedpoint to said antenna perimeter and disposed opposite said second transmission line;
- (m) said first and third radial transmission lines forming a small gap defining said central feedpoint and extending in opposite directions from said central feedpoint for launching a signal at said central feedpoint travelling radially outward/inward to the resonant said conductive circular sectors.
11 more elements
An antenna which comprises:
- (a) an electrically insulating substrate having a perimeter;
- (b) an antenna pattern disposed on said substrate having a central feedpoint, a portion of said antenna pattern extending to said perimeter of said substrate, wherein said antenna pattern includes:
- (i) a first antenna element having a plurality of first regions, each of said first regions composed of first plural interconnected concentric sectors of circles of diminishing radius extending to said feedpoint,
- (ii) a second antenna element having a plurality of second regions, each of said second regions composed of second plural interconnected concentric sectors of circles of diminishing radius extending to said feedpoint, and
- (iii) an infinite balun on said substrate interconnecting said sectors of circles and said connection,
- (c) a signal injection/extraction connection coupled to said antenna pattern at said perimeter of said electrically insulating substrate;
- and
- (d) a transmission line coupled to said connection at a location on said antenna pattern remote from said central feedpoint and at said perimeter of said electrically insulating substrate.
5 more elements
Dependencies are inferred from the claim text.