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EP0342175A2
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Dual-polarized printed circuit antenna having its elements, including gridded printed circuit elements, capacitively coupled to feedlines
Assignee: Comsat Corp
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Filing: 1989-05-09
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Granted: —
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Expires: 2009-05-09
Abstract
Abstract A dual-polarization geometry for printed-circuit antennas, in which two layers of radiating elements and corresponsing power dividers are provided, one set (400) of power dividers being disposed orthogonally with respect to the other (200), so as to enable reception of two signals with orthogonal senses of polarization. Either dual linear or dual circular polarization may be achieved through suitable selection of radiating elements. Alternatively, a quadrature hybrid may be coupled, either externally or as an integral part of the antenna, to enable dual circular polarization. Various shapes and types of radiating elements (16b), having patches or slots, may be employed in the various layers. Further, a gridded radiating element, formed of a grid (300) wherein a metallization region is etched selectively to yield a plurality of metal strips (16a) disposed parallel to each other with a predetermined separation, may be used. This element, in contrast to known elements which employ solid metallization regions, finds particular application in dual polarization geometries, wherein two signals are received simultaneously, and enables improved performance over a wide bandwidth. The gridded element also is applicable to single-polarization geometries.
Inventors
- 👤 Amir Ibrahim Zaghloul
- 👤 Robert Michael Sorbello
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 04:50
CPC Classifications
H; H05; H05K; H05K1/00; H01; H01Q; H01Q25/00; H01Q25/001; H01Q21/00; H01Q21/06; H01Q21/061; H01Q21/065; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/045; H01Q9/0457
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
139 words
A printed circuit antenna comprising: a ground plane; a first power divider array disposed over and capacitively coupled to said ground plane; and a first array of radiating elements disposed over and capacitively coupled to the first power divider array, wherein said first array of radiating elements comprises: a substrate; and a metallization layer formed over said substrate; wherein each of said radiating elements in said first array of radiating elements comprises a slot configuration in which a metal portion has slots on either side thereof, said slots being formed by removing portions of said metallization layer, such that one of said slots and said metal portion is formed as a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal.
Claim 2
Dependent Claim
139 words
A printed circuit antenna comprising: a ground plane; a first power divider array disposed over and capacitively coupled to said ground plane; and a first array of radiating elements disposed over and capacitively coupled to the first power divider array, wherein said first array of radiating elements comprises: a substrate; and a metallization layer formed over said substrate; wherein each of said radiating elements in said first array of radiating elements comprises a slot configuration in which a metal portion has slots on either side thereof, said slots being formed by removing portions of said metallization layer, such that one of said slots and said metal portion is formed as a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal.
Claim 3
Dependent Claim
42 words
A printed circuit antenna as claimed in claim 1, wherein each of said radiating elements in said first array of radiating elements comprises first, second, and third regions, at least two of said first through third regions comprising said gridded metallization region.
Claim 4
Dependent Claim
80 words
A printed circuit antenna as claimed in claim 2, further comprising a second power divider array disposed over and capacitively coupled to said first array of radiating elements, and a second array of radiating elements disposed over and capacitively coupled to said second power divider array, wherein said each of said radiating elements in said second array of radiating elements comprises fourth, fifth, and sixth regions, at least two of said fourth through sixth regions comprising said gridded metallization region.
Claim 5
Dependent Claim
210 words
A printed circuit antenna comprising a ground plane, a first power divider array disposed over and capacitively coupled to said ground plane, a first array of radiating elements disposed over and capacitively coupled to the first power divider array, a second power divider array disposed over and capacitively coupled to said first array of radiating elements, and a second array of radiating elements disposed over and capacitively coupled to said second power divider array, wherein said first array of radiating elements comprises: a substrate; and a metallization layer formed over said substrate; wherein each of said radiating elements in said first array of radiating elements comprises first, second, and third regions, at least one of said first through third regions comprising a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal; and wherein said each of said radiating elements in said second array of radiating elements comprises fourth, fifth, and sixth regions, at least one of said fourth through sixth regions comprising a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal.
Claim 6
Dependent Claim
210 words
A printed circuit antenna comprising a ground plane, a first power divider array disposed over and capacitively coupled to said ground plane, a first array of radiating elements disposed over and capacitively coupled to the first power divider array, a second power divider array disposed over and capacitively coupled to said first array of radiating elements, and a second array of radiating elements disposed over and capacitively coupled to said second power divider array, wherein said first array of radiating elements comprises: a substrate; and a metallization layer formed over said substrate; wherein each of said radiating elements in said first array of radiating elements comprises first, second, and third regions, at least one of said first through third regions comprising a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal; and wherein said each of said radiating elements in said second array of radiating elements comprises fourth, fifth, and sixth regions, at least one of said fourth through sixth regions comprising a gridded metallization region wherein metal is selectively removed and a plurality of parallel metal strips remain, said strips being separated at regular intervals by absences of said metal.
Claim 7
Dependent Claim
43 words
An antenna as claimed in claim 3 or claim 4, wherein said first and third regions and/or said fourth and sixth regions have metallization completely removed therefrom to form slots, and said second region and/or said fifth region comprises said gridded metallization region.
Claim 8
Dependent Claim
33 words
An antenna as claimed in claim 3 or claim 4, wherein said first and third regions and/or said fourth and sixth regions have metallization selectively removed therefrom to form additional gridded metallization regions.
Claim 9
Dependent Claim
20 words
An antenna as claimed in claim 6, wherein said second region and/or said fifth region has no metal removed therefrom.
Claim 10
Dependent Claim
57 words
An antenna as claimed in claim 4 or claim 6, wherein said first power divider array feeds each of said radiating elements in said first array of radiating elements at a single feedpoint, and wherein said second power divider array feeds each of said radiating elements in said second array of radiating elements at a single feedpoint.
Claim 11
Dependent Claim
83 words
An antenna as claimed in claim 3 or claim 4, wherein said first and third regions and/or said fourth and sixth regions have metallization completely removed therefrom to form slots, said second region and/or said fifth regions comprising said gridded metallization region, and wherein said second array of radiating elements is disposed with respect to said first array of radiating elements such that said first and second power divider arrays feed respective ones of said second and fifth regions in mutually orthogonal fashion.
Claim 12
Dependent Claim
96 words
A dual-polarized printed circuit antenna comprising: a ground plane; a first power divider array disposed over said ground plane; a first array of radiating elements disposed over said first power divider array; a second power divider array disposed over said first array of radiating elements; and a second array of radiating elements disposed over said second power divider array; wherein said first power divider array and said first array of radiating elements are capacitively coupled to each other, and said second power divider array and second array of radiating elements are capacitively coupled to each other.
Claim 13
Dependent Claim
96 words
A dual-polarized printed circuit antenna comprising: a ground plane; a first power divider array disposed over said ground plane; a first array of radiating elements disposed over said first power divider array; a second power divider array disposed over said first array of radiating elements; and a second array of radiating elements disposed over said second power divider array; wherein said first power divider array and said first array of radiating elements are capacitively coupled to each other, and said second power divider array and second array of radiating elements are capacitively coupled to each other.
Claim 14
Dependent Claim
78 words
A dual-polarized printed circuit antenna according to claim 10, wherein each of the radiating elements in said second array of radiating elements comprise slots, and each of the elements in said first array of radiating elements comprise slots with sufficient metallization added to divide each element within said first array of radiating elements into two U-shaped portions, said metallization optionally being sufficient to divide each element within said first array of radiating elements into two parallel rectangular portions.
Claim 15
Dependent Claim
42 words
A dual-polarized printed circuit antenna as claimed in claim 10, wherein said first and second arrays of radiating elements comprise radiating patches or radiating slots, said radiating patches or radiating slots having tabs or notches added thereto so as achieve circular polarization.
Claim 16
Dependent Claim
36 words
A dual-polarized printed circuit antenna as claimed in claim 3, 4, 8, or 10, further comprising a quadrature hybrid connected to respective inputs of said antenna, so as to achieve two independent senses of circular polarization.
Claim 17
Dependent Claim
37 words
A dual-polarized printed circuit antenna as claimed in claim 3, 4, or 10, wherein said second power divider array has its elements disposed at a different angular orientation than the elements of said first power divider array.
Claim 18
Dependent Claim
46 words
A dual-polarized printed circuit antenna as claimed in claim 3, 4, or 10, wherein said second power divider array has its elements disposed orthogonally with respect to elements of said first power divider array, such that senses of polarization achieved by said antenna are mutually orthogonal.
Claim 19
Dependent Claim
23 words
A dual-polarized printed circuit antenna as claimed in claim 12, wherein all of said patches or slots are square-shaped or circular in shape.
Claim 20
Dependent Claim
52 words
A dual-polarized printed circuit antenna as claimed in claim 10, wherein all of said ground plane, said first and second power divider arrays, and said first and second arrays of radiating elements are mutually separated by a suitable dielectric selected from the group consisting of air, polyethylene, Duroid(tm), nomex, and Teflon (tm).
Claim 21
Dependent Claim
39 words
A dual-polarized printed circuit antenna as claimed in claim 11, wherein said metallization is added where portions of said second power divider array pass underneath corresponding elements in said second array of radiating elements, so as to minimize cross-talk.
Claim 22
Dependent Claim
78 words
A dual-polarized printed circuit antenna as claimed in claim 10, wherein said first array of radiating elements and said first power divider array, together with said ground plane, form a first antenna array having a first sense of polarization, and wherein said second of radiating elements and said second power divider array, together with said first array of radiating elements, form a second antenna array having a second sense of polarization orthogonal to said first sense of polarization.
References Cited (Backward Citations)
No citation records indexed.
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