Multiband antenna
First Claim
1. A multiband antenna comprising:
- a multilevel conducting structure, substantial portions of which are formed of a plurality of first generally identifiable polygons;
said plurality of polygons including geometric elements identifiably defined by a free perimeter thereof and a projection of the longest exposed perimeter thereof to define the least number of generally identifiable polygons within a region;
at least two polygons of said plurality of polygons being interconnected by a conducting strip which is narrower in width than either one of the at least two polygons; and
wherein the at least two polygons of said plurality of polygons are separated by a non-straight gap contributing to tuning a frequency behavior of the multiband antenna.
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Abstract
The present invention relates generally to a new family of antennas with a multiband behavior, so that the frequency bands of the antenna can be tuned simultaneously to the main existing wireless services. In particular, the invention consists of shaping at least one of the gaps between some of the polygons of the multilevel structure in the form of a non-straight curve, shaped in such a way that the whole gap length is increased yet keeping its size and the same overall antenna size. Such a configuration allows an effective tuning of the frequency bands of the antenna, such that with the same overall antenna size, said antenna can be effectively tuned simultaneously to some specific services, such as for instance the five frequency bands that cover the services AMPS, GSM900, GSM1800, PCS1900, UMTS, Bluetooth™, IEEE802.11b, or HyperLAN.
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Citations
50 Claims
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1. A multiband antenna comprising:
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a multilevel conducting structure, substantial portions of which are formed of a plurality of first generally identifiable polygons; said plurality of polygons including geometric elements identifiably defined by a free perimeter thereof and a projection of the longest exposed perimeter thereof to define the least number of generally identifiable polygons within a region; at least two polygons of said plurality of polygons being interconnected by a conducting strip which is narrower in width than either one of the at least two polygons; and wherein the at least two polygons of said plurality of polygons are separated by a non-straight gap contributing to tuning a frequency behavior of the multiband antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A multiband antenna comprising:
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at least one multilevel conducting structure, substantial portions of which are formed of a set of first generally identifiable polygons having an equal number of sides or faces; said set of polygons including geometric elements identifiably defined by a free perimeter thereof and a projection of the longest exposed perimeter thereof to define the least number of generally identifiable polygons within a region; at least two polygons of said set of polygons being coupled by a conducting strip which is narrower in width than either one of the at least two polygons; and wherein the at least two polygons of said set of polygons are separated by a non-straight gap contributing to tuning a frequency behavior of the multiband antenna. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A multiband antenna having a multilevel conducting structure constructed with a plurality of polygons having multiple exposed and connected sides, with the connected sides forming contact regions between at least two generally identifiable polygons, the multilevel conducting structure comprising:
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at least two polygons electromagnetically coupled one to the other through one or both of exposed and connected sides, with each of the at least two polygons having the same number of sides; sides of the polygons along a contact region being defined by the projection of the longest exposed side extending into the contact region of connected polygons; and the at least two polygons being separated by a non-straight gap contributing to tuning a frequency behavior of the multiband antenna. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An antenna-tuning method comprising:
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designing a multiband antenna having a multilevel conducting structure constructed with a plurality of generally identifiable polygons having multiple exposed and connected sides; forming, via the connected sides, a contact region between at least two polygons; electromagnetically coupling, via one or both of exposed and connected sides, the at least two polygons, each of the at least two polygons having the same number of sides; tuning a frequency behavior of the multiband antenna, the tuning step comprising shaping a gap between the at least two polygons in the form of a non-straight curve without altering the overall size of the multiband antenna; and wherein the shaping step comprises modifying a resonating frequency of a plurality of resonating frequencies of the multiband antenna relative to a multiband antenna comprising an otherwise identical gap without the non-straight curve. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A multiband antenna comprising:
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at least one multilevel conducting structure, substantial portions of which include at least one antenna region comprising a plurality of first generally identifiable polygons; said plurality of polygons including geometric elements identifiably defined by a free perimeter thereof and a projection of the longest exposed perimeter thereof to define the least number of generally identifiable polygons within a region; at least two polygons of said plurality of polygons being interconnected by a conducting strip which is narrower in width than either one of the at least two polygons; and wherein the at least two polygons of said plurality of polygons are separated by a non-straight gap contributing to tuning a frequency behavior of the multiband antenna.
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50. An antenna-tuning method comprising:
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designing a multiband antenna having a multilevel conducting structure; forming substantial portions of the multilevel conducting structure with a plurality of first generally identifiable polygons, said plurality of polygons including geometric elements identifiably defined by a free perimeter thereof and a projection of the longest exposed perimeter thereof to define the least number of generally identifiable polygons within a region; interconnecting at least two polygons of said plurality of polygons with a conducting strip which is narrower in width than either one of the at least two polygons; and tuning a frequency behavior of the multiband antenna through shaping of a gap between the at least two polygons of said plurality of polygons in the form of a non-straight curve without altering the overall size of the multiband antenna.
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Specification