Multi-band planar inverted-F antennas including floating parasitic elements and wireless terminals incorporating the same
First Claim
1. A multi-band antenna comprising:
- a first planar inverted-F antenna branch configured to resonate in response to first electromagnetic radiation in a first frequency band;
a second planar inverted-F antenna branch configured to resonate in response to second electromagnetic radiation in a second frequency band that is less than the first frequency band; and
a floating parasitic element ohmically isolated from the second planar inverted-F antenna branch and configured to resonate in the first frequency band.
1 Assignment
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Accused Products
Abstract
A multi-band planar inverted-F antenna includes a floating parasitic element. For example, a planar inverted-F antenna includes first and second planar inverted-F antenna branches that extend on a dielectric substrate. The first planar inverted-F antenna branch is configured to resonate in response to first electromagnetic radiation in a first frequency band. The second planar inverted-F antenna branch is configured to resonate in response to second electromagnetic radiation in a second frequency band. The floating parasitic element is configured to electromagnetically couple to the second planar inverted-F antenna branch when, for example, the second planar inverted-F antenna branch is excited by the electromagnetic radiation provided via an RF feed (when the antenna is used to transmit). The floating parasitic element is also configured to electromagnetically couple to the second planar inverted-F antenna branch when the floating parasitic element is excited by electromagnetic radiation provided via free-space.
89 Citations
25 Claims
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1. A multi-band antenna comprising:
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a first planar inverted-F antenna branch configured to resonate in response to first electromagnetic radiation in a first frequency band;
a second planar inverted-F antenna branch configured to resonate in response to second electromagnetic radiation in a second frequency band that is less than the first frequency band; and
a floating parasitic element ohmically isolated from the second planar inverted-F antenna branch and configured to resonate in the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A multi-band wireless terminal comprising:
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a housing that defines a cavity inside the housing;
a transceiver, positioned within the cavity, that receives multi-band and wireless communications signals and that transmits multi-band wireless communications signals; and
a multi-band antenna in the cavity comprising a first planar inverted-F antenna branch configured to resonate in response to first electromagnetic radiation in a first frequency band;
a second planar inverted-F antenna branch configured to resonate in response to second electromagnetic radiation in a second frequency band that is less than the first frequency band; and
a floating parasitic element ohmically isolated from the second planar inverted-F antenna branch and configured to resonate in the first frequency band. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A multi-band antenna comprising:
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a first planar inverted-F antenna branch configured to resonate in response to first electromagnetic radiation in a first frequency band;
a second planar inverted-F antenna branch configured to resonate in response to second electromagnetic radiation in a second frequency band that is less than the first frequency band; and
a floating parasitic element ohmically isolated from and coplanar with the second planar inverted-F antenna branch and configured to electromagnetically couple to the second planar inverted-F antenna branch. - View Dependent Claims (24, 25)
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Specification