SPACE-FILLING MINIATURE ANTENNAS
First Claim
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1. An apparatus comprising:
- a portable communication device, wherein said portable communication device is a handset;
an antenna, the antenna being included entirely within the handset;
wherein said antenna operates at multiple frequency bands, and wherein at least two of said frequency bands are within the 800 MHz-3600 MHz frequency range;
wherein a perimeter of the antenna is shaped as a multi-segment curve;
wherein said multi-segment curve comprises at least ten connected segments, each segment is shorter than one tenth of at least one operating free-space wavelength of the antenna; and
wherein said multi-segment curve is shaped so that an arrangement of the segments of the multi-segment curve are not self-similar with respect to the entire multi-segment curve.
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Abstract
A novel geometry, the geometry of Space-Filling Curves (SFC) is defined in the present invention and it is used to shape a part of an antenna. By means of this novel technique, the size of the antenna can be reduced with respect to prior art, or alternatively, given a fixed size the antenna can operate at a lower frequency with respect to a conventional antenna of the same size.
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Citations
72 Claims
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1. An apparatus comprising:
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a portable communication device, wherein said portable communication device is a handset; an antenna, the antenna being included entirely within the handset; wherein said antenna operates at multiple frequency bands, and wherein at least two of said frequency bands are within the 800 MHz-3600 MHz frequency range; wherein a perimeter of the antenna is shaped as a multi-segment curve; wherein said multi-segment curve comprises at least ten connected segments, each segment is shorter than one tenth of at least one operating free-space wavelength of the antenna; and wherein said multi-segment curve is shaped so that an arrangement of the segments of the multi-segment curve are not self-similar with respect to the entire multi-segment curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 64, 65, 66, 67)
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20. An apparatus comprising:
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a portable communication device, wherein said portable communication device is a handset; an antenna, the antenna being included entirely within the handset; wherein said antenna operates at multiple frequency bands, and wherein at least two of said frequency bands are within the 800 MHz-3600 MHz frequency range; wherein an edge of the antenna is shaped as a substantially non-periodic multi-segment curve; wherein said substantially non-periodic multi-segment curve comprises at least ten connected segments, each segment is shorter than one tenth of at least one operating free-space wavelength of the antenna; and wherein the antenna includes a matching network between an element and an input connector or transmission line. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 68, 69)
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41. An apparatus comprising:
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a portable communication device, the portable communication device being a handset; an antenna, the antenna being included entirely within the handset; wherein said antenna operates at multiple frequency bands; wherein at least two of said multiple frequency bands are within the 800 MHz-3600 MHz frequency range; wherein the antenna comprises a radiating element, a perimeter of which is defined by a multi-segment, irregular curve comprising a plurality of segments, each of said segments being spatially arranged such that no two adjacent and connected segments form another longer straight segment and none of said segments intersects with another segment other than at the beginning and at the end of said multi-segment, irregular curve to form a closed loop; and wherein the multi-segment, irregular curve has a box counting dimension larger than one. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 70, 71, 72)
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Specification