Coupled multiband antennas
First Claim
1. An antenna device comprising:
- at least two radiating arms;
a ground plane;
a first arm of the at least two radiating arms includes first and second ends and a feeding point at the first end;
a second arm of the at least two radiating arms includes first and second ends and a grounding point at the second end;
wherein the at least two radiating arms are coupled by at least one close proximity region, said at least one close proximity region being formed by a portion between said two arms in which a distance between at least a first point in said first arm and at least a second point in the second arm is smaller than a distance between said feeding point and the grounding point and the at least one close proximity region does not intersect a projection orthogonal to the ground plane;
wherein the antenna does not include a contact point between said first arm and said second arm; and
wherein said antenna is a monopole antenna.
1 Assignment
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Accused Products
Abstract
The present invention consists of an antenna comprising at least two radiating structures, said radiating structures taking the form of two arms, said arms being made of or limited by a conductor, superconductor or semiconductor material, said two arms being coupled to each other through a region on first and second superconducting arms such that the combined structure of the coupled two-arms forms a small antenna with a broadband behavior, a multiband behavior or a combination of both effects. According to the present invention, the coupling between the two radiating arms is obtained by means of the shape and spatial arrangement of said two arms, in which at least one portion on each arm is placed in close proximity to each other (for instance, at a distance smaller than a tenth of the longest free-space operating wavelength) to allow electromagnetic fields in one arm being transferred to the other through said specific close proximity regions. Said proximity regions are located at a distance from the feeding port of the antenna (for instance a distance larger than 1/40 of the free-space longest operating wavelength) and specifically exclude said feeding port of the antenna.
47 Citations
52 Claims
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1. An antenna device comprising:
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at least two radiating arms; a ground plane; a first arm of the at least two radiating arms includes first and second ends and a feeding point at the first end; a second arm of the at least two radiating arms includes first and second ends and a grounding point at the second end; wherein the at least two radiating arms are coupled by at least one close proximity region, said at least one close proximity region being formed by a portion between said two arms in which a distance between at least a first point in said first arm and at least a second point in the second arm is smaller than a distance between said feeding point and the grounding point and the at least one close proximity region does not intersect a projection orthogonal to the ground plane; wherein the antenna does not include a contact point between said first arm and said second arm; and wherein said antenna is a monopole antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An antenna device comprising:
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a first radiating arm; a second radiating arm; a ground plane; said first radiating arm including first and second ends and a feeding point at the first end; said second radiating arm including first and second ends and a grounding point at the second end; wherein the distance between a first point in said first radiating arm and a second point in said second radiating arm is smaller than a distance between any third point on said first radiating arm and any fourth point on said second radiating arm; wherein said third and fourth points are located at a distance away from the feeding or the grounding point of said first and second arms; wherein a line between the first point and the second point does not intersect an orthogonal projection of the ground plane; wherein said distance between said third and fourth points is longer than 1/40 of a free-space operating wavelength; wherein the antenna does not include a contact point between said first arm and said second arm; and wherein said antenna is a monopole antenna. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. An antenna device comprising:
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at least two radiating arms; a ground-plane; a first arm of the at least two radiating arms includes a feeding point at a first end; a second arm of the at least two radiating arms includes a grounding point at a second end; wherein the first arm and the second arm are electromagnetically coupled by at least a close proximity region formed by a portion between the first arm and the second arm; wherein the at least a close proximity region does not intersect an orthogonal projection of the around plane; wherein the antenna does not include a contact point between the first arm and the second arm; and wherein the antenna is a monopole antenna.
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51. An antenna device comprising:
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at least two radiating arms; a ground-plane; a first arm of the at least two radiating arms includes a feeding port, the feeding port including a feeding point at a first end of the first arm and a contact point on the ground-plane; a second arm of the at least two radiating arms includes a grounding point at a second end; wherein the at least two radiating arms are monopoles; wherein at least one of the at least two radiating arms is provided with an unbalanced feed; wherein the first and second radiating arms are electromagnetically coupled by at least a close proximity region formed by a portion between the first and second radiating arms; wherein the at least a close proximity region does not intersect an orthogonal projection of the ground plane; and wherein the antenna does not include a contact point between the first and the second radiating arms.
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52. An antenna device comprising:
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at least two radiating arms; a ground plane; a first arm of the at least two radiating arms includes a feeding point at a first end; a second arm of the at least two radiating arms includes a grounding point at a second end; wherein the first and second radiating arms form at least one close proximity region and are 3D structures; wherein the at least one close proximity region does not intersect an orthgonal projection of the ground plane; and wherein said antenna is a monopole antenna.
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Specification