Multilevel and space-filling ground-planes for miniature and multiband antennas
First Claim
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1. A handheld wireless device comprising:
- an antenna element, the antenna element including a feeding point;
a ground plane, the ground plane operating in cooperation with the antenna element;
a printed circuit board, the printed circuit board including a conducting layer;
a feeding means, the feeding means being arranged on the printed circuit board; and
a dielectric support;
wherein the antenna element is arranged on the dielectric support;
wherein the feeding means are coupled to the feeding point of the antenna element;
wherein the ground plane comprises;
a first conducting surface and a second conducting surface, each of the first conducting surface and the second conducting surface having an elongated shape with two opposite ends;
wherein the first conducting surface is arranged as the conducting layer of the printed circuit board; and
a conducting strip, the conducting strip connecting an end of the first conducting surface with an end of the second conducting surface and allowing current to flow between the first conducting surface and the second conducting surface;
wherein the conducting strip is narrower than a width of the first conducting surface and a width of the second conducting surface;
wherein the antenna element is shaped as a structure comprising;
a plurality of conducting polygon, the plurality of conducting polygons each having the same number of sides;
wherein the plurality of conducting polygons of the structure are electromagnetically coupled via either capacitive coupling or ohmic contact;
wherein a contact region between directly connected conducting polygons of the plurality of conducting polygons of the structure is smaller than half of a perimeter of the directly connected conducting polygons in at least seventy-five percent of the plurality conducting polygons of the structure; and
wherein the antenna element is arranged adjacent to said end of the first conducting surface.
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Abstract
An antenna system includes one or more conductive elements acting as radiating elements, and a multilevel or space-filling ground-plane, wherein said ground-plane has a particular geometry which affects the operating characteristics of the antenna. The return loss, bandwidth, gain, radiation efficiency, and frequency performance can be controlled through multilevel and space-filling ground-plane design. Also, said ground-plane can be reduced compared to those of antennas with solid ground-planes.
36 Citations
50 Claims
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1. A handheld wireless device comprising:
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an antenna element, the antenna element including a feeding point; a ground plane, the ground plane operating in cooperation with the antenna element; a printed circuit board, the printed circuit board including a conducting layer; a feeding means, the feeding means being arranged on the printed circuit board; and a dielectric support; wherein the antenna element is arranged on the dielectric support; wherein the feeding means are coupled to the feeding point of the antenna element; wherein the ground plane comprises; a first conducting surface and a second conducting surface, each of the first conducting surface and the second conducting surface having an elongated shape with two opposite ends; wherein the first conducting surface is arranged as the conducting layer of the printed circuit board; and a conducting strip, the conducting strip connecting an end of the first conducting surface with an end of the second conducting surface and allowing current to flow between the first conducting surface and the second conducting surface; wherein the conducting strip is narrower than a width of the first conducting surface and a width of the second conducting surface; wherein the antenna element is shaped as a structure comprising; a plurality of conducting polygon, the plurality of conducting polygons each having the same number of sides; wherein the plurality of conducting polygons of the structure are electromagnetically coupled via either capacitive coupling or ohmic contact; wherein a contact region between directly connected conducting polygons of the plurality of conducting polygons of the structure is smaller than half of a perimeter of the directly connected conducting polygons in at least seventy-five percent of the plurality conducting polygons of the structure; and wherein the antenna element is arranged adjacent to said end of the first conducting surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A handheld wireless device comprising:
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an antenna element, the antenna element including a feeding point; a ground plane, the ground plane operating in cooperation with the antenna element; a first printed circuit board and a second printed circuit board, each of the first printed circuit board and the second printed circuit board including a conducting layer; a feeding means, the feeding means being arranged on the first printed circuit board; a dielectric support; wherein the antenna element is arranged on the dielectric support; and wherein the feeding means are coupled to the feeding point of the antenna element; wherein the ground plane comprises; a first conducting surface and a second conducting surface, each of the first conducting surface and the second conducting surface having a plurality of sides defined by at least one edge; wherein the first conducting surface is arranged as the conducting layer of the first printed circuit board; wherein the second conducting surface is arranged as the conducting layer of the second printed circuit board; and a first conducting strip and a second conducting strip, each of the first conducting strip and the second conducting strip connecting the first conducting surface and the second conducting surface and allowing current to flow between the first conducting surface and the second conducting surface; wherein the first conducting strip has a first width, the first width being narrower than a width of the first conducting surface and a width of the second conducting surface; and wherein the second conducting strip has a second width, the second width being narrower than the width of the first conducting surface and the width of the second conducting surface; wherein at least one of the first conducting surface, the second conducting surface, the first conducting strip and the second conducting strip defines a first structure; wherein the first structure comprises a plurality of conducting polygons, each of the plurality of conducting polygons having the same number of sides; wherein the plurality of conducting polygons are electromagnetically coupled via either capacitive coupling or ohmic contact; wherein a contact region between directly connected conducting polygons of the plurality of conducting polygons is smaller than half of a perimeter of the directly connected conducting polygons in at least seventy-five percent of the conducting polygons of the first structure; wherein the antenna element is shaped as a second structure comprising; a plurality of conducting polygons, the plurality of conducting polygons each having the same number of sides; wherein the plurality of conducting polygons of the second structure are electromagnetically coupled via either capacitive coupling or ohmic contact; and wherein a contact region between directly connected conducting polygons of the plurality of conducting polygons of the second structure is smaller than half of the perimeter of the directly connected conducting polygons in at least seventy-five percent of the plurality conducting polygons of the second structure. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification