Multiband antenna for handheld terminal
First Claim
1. A multiband antenna comprising:
- a first conducting layer;
a second conducting layer;
said first conducting layer acting as a radiating element being placed over said second conducting layer;
said second conducting layer acting as a ground plane;
said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna;
wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm, such that a gap between said first shorter arm and said second longer arm is formed;
said gap following substantially the same winding path as said first and second arms on said multilevel structure; and
wherein said at least one multilevel structure comprises a conducting structure including a set of polygons, all of said polygons featuring the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, wherein a contact region between directly connected polygons is narrower than 50% of a perimeter of said polygons in at least 75% of said polygons defining said conducting multilevel structure.
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Accused Products
Abstract
The present invention relates generally to a new family of antennas with a multiband behaviour and a reduced size. The general configuration of the antenna consists of a multilevel structure which provides the multiband behaviour, combined with a multilevel and/or space-filling ground-plane. The multilevel structure consists of two arms of different length that follow a winding parallel path spaced by a winding parallel gap (parallel to the arms) with a substantially similar shape as each of said arms, that is, with a similar winding path as the arms. The resulting antenna covers the major current and future wireless services, opening this way a wide range of possibilities in the design of universal, multi-purpose, wireless terminals and devices.
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Citations
21 Claims
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1. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm, such that a gap between said first shorter arm and said second longer arm is formed; said gap following substantially the same winding path as said first and second arms on said multilevel structure; and wherein said at least one multilevel structure comprises a conducting structure including a set of polygons, all of said polygons featuring the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, wherein a contact region between directly connected polygons is narrower than 50% of a perimeter of said polygons in at least 75% of said polygons defining said conducting multilevel structure. - View Dependent Claims (2, 3, 4, 5, 6, 15, 16, 17)
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7. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both; and wherein said at least one multilevel structure comprises a conducting structure including a set of polygons, all of said polygons featuring the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, wherein a contact region between directly connected polygons is narrower than 50% of a perimeter of said polygons in at least 75% of said polygons defining said conducting multilevel structure. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm, such that a gap between said first shorter arm and said second longer arm is formed; said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein said first shorter arm is composed by at least four rectangles, said four rectangles being sequentially interconnected through their shorter edges; and wherein said second longer arm is composed at least by eleven rectangles, said eleven rectangles being sequentially interconnected through their shorter edges, wherein said both arms define said winding path over said second conducting layer, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between both arms is formed, said gap following substantially similar winding path to those of said first and second arms.
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18. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both; and wherein said multilevel or space-filling structure on said second conducting layer defines a single slot on said ground-plane.
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19. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both; and wherein said multilevel or space-filling structure on said second conducting layer defines at least two slots on said ground-plane.
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20. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both; and wherein said multilevel or space-filling structure on said second conducting layer defines at least a slot on said ground-plane, said slot being substantially aligned underneath one edge of said first conducting layer.
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21. A multiband antenna comprising:
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a first conducting layer; a second conducting layer; said first conducting layer acting as a radiating element being placed over said second conducting layer; said second conducting layer acting as a ground plane; said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna; wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure; wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both; and wherein said at least one space-filling structure comprises a curve comprising at least ten segments which are connected in such a way that each segment forms an angle with their neighbours, wherein no pair of adjacent segments define a larger straight segment, and wherein the curve can be optionally periodic along a fixed straight direction of space if the period is defined by a non-periodic curve composed by at least ten connected segments and no pair of said adjacent and connected segments define a straight longer segment.
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Specification