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.
47 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