Broadside high-directivity microstrip patch antennas
First Claim
1. An antenna system comprising:
- a driven antenna element;
a parasitic antenna element;
a dielectric support;
a ground plane layer;
a first input terminal, the first input terminal being coupled to the driven antenna element;
a second input terminal, the second input terminal being coupled to the ground plane layer;
wherein the driven antenna element and the parasitic antenna element are arranged on the dielectric support;
wherein the parasitic antenna element is coupled to the driven antenna element by means of a gap between the driven antenna element and the parasitic antenna element; and
wherein the gap is defined by a space-filling curve, said space-filling curve being a curve comprising at least ten connected segments, wherein each of said segments forms an angle with its neighbors so that no pair of adjacent segments define a longer straight segment, and wherein any portion of the curve that is periodic along a fixed straight direction of space is defined by a non-periodic curve comprising at least ten connected segments in which no pair of adjacent and connected segments define a longer straight segment.
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Accused Products
Abstract
High-directivity microstrip antennas comprising a driven patch and at least one parasitic element placed on the same plane, operate at a frequency larger than the fundamental mode of the driven patch in order to obtain a resonant frequency with a high-directivity broadside radiation pattern. The driven patch, the parasitic elements and the gaps between them may be shaped as multilevel and/or Space Filling geometries. The gap defined between the driven and parasitic patches according to the invention is used to control the resonant frequency where the high-directivity behavior is obtained. The invention provides that with one single element is possible to obtain the same directivity than an array of microstrip antennas operating at the fundamental mode.
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Citations
20 Claims
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1. An antenna system comprising:
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a driven antenna element; a parasitic antenna element; a dielectric support; a ground plane layer; a first input terminal, the first input terminal being coupled to the driven antenna element; a second input terminal, the second input terminal being coupled to the ground plane layer; wherein the driven antenna element and the parasitic antenna element are arranged on the dielectric support; wherein the parasitic antenna element is coupled to the driven antenna element by means of a gap between the driven antenna element and the parasitic antenna element; and wherein the gap is defined by a space-filling curve, said space-filling curve being a curve comprising at least ten connected segments, wherein each of said segments forms an angle with its neighbors so that no pair of adjacent segments define a longer straight segment, and wherein any portion of the curve that is periodic along a fixed straight direction of space is defined by a non-periodic curve comprising at least ten connected segments in which no pair of adjacent and connected segments define a longer straight segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An antenna system comprising:
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a driven antenna element; a parasitic antenna element; a dielectric support; a ground plane layer; a first input terminal, the first input terminal being coupled to the driven antenna element; a second input terminal, the second input terminal being coupled to the ground plane layer; wherein the driven antenna element and the parasitic antenna element are arranged on the dielectric support; wherein the parasitic antenna element is coupled to the driven antenna element by means of a gap between the driven antenna element and the parasitic antenna element; wherein the gap having a width smaller than approximately 1/150 of the wavelength of a lowest frequency of operation of the antenna system; wherein at least a part of the driven antenna element and at least a part of the parasitic antenna element is defined by at least one of a space-filling curve and a multilevel structure; and wherein the antenna system is operative at multiple frequency bands. - View Dependent Claims (20)
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Specification