Compact polarized antenna and methods
First Claim
1. An antenna component for use in a portable communications device, the device comprising a ground, a feed port, and a ground plane, the antenna component comprising:
- a dielectric substrate;
a radiator element disposed proximate to a surface of the substrate; and
a feed conductor configured to couple to the radiator element at a feed point;
wherein the antenna component is configured to operate in a first mode when placed under a first operating condition, and to operate in a second mode when placed under a second operating condition;
wherein the first mode is configured to operate as a linear polarized antenna, and the second mode is configured to operate as a right hand circular polarized (RHCP) antenna; and
wherein the first operating condition comprises the portable communications device operating in free-space, and the second operating condition comprises the portable communications device operating under a loading condition.
1 Assignment
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Accused Products
Abstract
A right-hand circular polarized antenna and associated methods. In one embodiment, a quarter-wave antenna configuration is used within a small form factor portable device (e.g. wristwatch). The antenna comprises a radiator element which operates in as a linear polarized antenna while the device is operating in free space. However, when the device is attached to a user (e.g. at a user'"'"'s wrist), the antenna utilizes the loading of the user'"'"'s body tissue in order to suppress unwanted signals (e.g. left hand polarized signals) to permit operation in circular polarized mode (e.g. right hand polarized mode), thereby allowing for increased sensitivity to received circularly polarized signals such as those emanated from global positioning satellites.
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Citations
18 Claims
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1. An antenna component for use in a portable communications device, the device comprising a ground, a feed port, and a ground plane, the antenna component comprising:
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a dielectric substrate; a radiator element disposed proximate to a surface of the substrate; and a feed conductor configured to couple to the radiator element at a feed point; wherein the antenna component is configured to operate in a first mode when placed under a first operating condition, and to operate in a second mode when placed under a second operating condition; wherein the first mode is configured to operate as a linear polarized antenna, and the second mode is configured to operate as a right hand circular polarized (RHCP) antenna; and wherein the first operating condition comprises the portable communications device operating in free-space, and the second operating condition comprises the portable communications device operating under a loading condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An antenna component for use in a portable communications device, the device comprising a ground, a feed port, and a ground plane, the antenna component comprising:
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a dielectric substrate; a radiator element disposed proximate to a surface of the substrate; and a feed conductor configured to couple to the radiator element at a feed point; wherein the antenna component is configured to operate in a first mode when placed under a first operating condition, and to operate in a second mode when placed under a second operating condition; and wherein the feed port is coupled to a ground point of the portable communications device, the coupling occurring at a point between the feed point and the ground point. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification