Multiband antenna
First Claim
1. A multiband antenna comprising:
- a multilevel structure comprising a conducting structure including a set of polygons, all of said polygons having the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, and wherein a contact region between directly connected polygons is narrower than 50% of the perimeter of said polygons in at least 75% of said polygons defining said conducting structure;
wherein said set of polygons comprises at least eight polygons; and
wherein at least two polygons of the multilevel structure are spaced by means of a non-straight gap;
wherein the non-straight gap increases a resonant length of the multiband antenna but does not increase an overall physical size of the multiband antenna; and
wherein the overall physical size of the multiband antenna is defined by the outer dimensions of the multiband antenna.
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Accused Products
Abstract
The present invention relates generally to a new family of antennas with a multiband behaviour, 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
49 Claims
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1. A multiband antenna comprising:
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a multilevel structure comprising a conducting structure including a set of polygons, all of said polygons having the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, and wherein a contact region between directly connected polygons is narrower than 50% of the perimeter of said polygons in at least 75% of said polygons defining said conducting structure; wherein said set of polygons comprises at least eight polygons; and wherein at least two polygons of the multilevel structure are spaced by means of a non-straight gap; wherein the non-straight gap increases a resonant length of the multiband antenna but does not increase an overall physical size of the multiband antenna; and wherein the overall physical size of the multiband antenna is defined by the outer dimensions of the multiband antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multiband antenna configured to operate at five bands, the multiband antenna comprising:
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a multilevel structure comprising a conducting structure including a set of polygons, all of said polygons having the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, and wherein a contact region between directly connected polygons is narrower than 50% of the perimeter of said polygons in at least 75% of said polygons defining said conducting structure; wherein said set of polygons comprises at least eight polygons; and wherein at least two polygons of the multilevel structure are spaced by means of a non-straight gap and at least two polygons of the multilevel structure are quadrangles; wherein the non-straight gap increases a resonant length of the multiband antenna but does not increase an overall physical size of the multiband antenna; and wherein the overall physical size of the multiband antenna is defined by the outer dimensions of the multiband antenna. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An antenna, comprising:
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a first conducting portion; a second conducting portion electromagnetically coupled to the first conducting portion; the first and second conducting portions defining a non-straight gap therebetween; wherein the non-straight gap increases a resonant length of the antenna, but does not increase the outer dimensions of the antenna; and a multilevel structure comprising at least eight polygons, the multilevel structure comprising a conducting structure including a set of polygons, all of said polygons having the same number of sides, wherein said polygons are electromagnetically coupled either by means of a capacitive coupling or ohmic contact, and wherein a contact region between directly connected polygons is narrower than 50% of the perimeter of said polygons in at least 75% of said polygons defining said conducting structure. - View Dependent Claims (26, 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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Specification