Compact, broadband inverted-F antennas with conductive elements and wireless communicators incorporating same
First Claim
1. An inverted-F antenna, comprising:
- a first ground plane;
an elongated conductive element capacitively coupled to the first ground plane, wherein the elongated conductive element is in adjacent, spaced-apart relationship with the first ground plane, wherein a first plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a first distance, and wherein a second plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a second distance greater than the first distance;
an RF signal feed extending from the elongated conductive element; and
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element.
8 Assignments
0 Petitions
Accused Products
Abstract
Inverted-F antennas having elongated, conductive elements for use within communications devices, such as radiotelephones, are provided. An elongated, meandering conductive element having a plurality of spaced-apart U-shaped undulations is maintained in adjacent, spaced-apart relationship with a first ground plane. One or more of the U-shaped undulations capacitively couple to the ground plane and allow the antenna to resonate at lower frequencies and with a greater bandwidth. A second ground plane may be oriented in a direction transverse to the first ground plane so as to be positioned in adjacent, spaced-apart relationship with one or more of the U-shaped undulations. One or more of the U-shaped undulations can capacitively couple to the second ground plane, as well as to the first ground plane. In addition, one or more inductive elements may be electrically connected to an elongated conductive element.
141 Citations
41 Claims
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1. An inverted-F antenna, comprising:
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a first ground plane;
an elongated conductive element capacitively coupled to the first ground plane, wherein the elongated conductive element is in adjacent, spaced-apart relationship with the first ground plane, wherein a first plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a first distance, and wherein a second plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a second distance greater than the first distance;
an RF signal feed extending from the elongated conductive element; and
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An inverted-F antenna, comprising:
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a first ground plane;
an elongated, meandering conductive element capacitively coupled to the first ground plane, wherein the elongated, meandering conductive element is in adjacent, spaced-apart relationship with the first ground plane, wherein the elongated, meandering conductive element comprises a plurality of U-shaped portions that extend towards the first ground plane;
an RF signal feed extending from the elongated, meandering conductive element; and
a ground feed extending from the elongated, meandering conductive element adjacent the RF signal feed and electrically grounding the meandering conductive element. - View Dependent Claims (12, 13, 14, 15)
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16. An inverted-F antenna, comprising:
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a ground plane;
at least one grounded portion extending outwardly from the ground plane;
an elongated conductive element in adjacent, spaced-apart relationship with the ground plane and with the at least one outwardly extending grounded portion, wherein the elongated conductive element is spaced apart from the ground plane by a first distance, and wherein the elongated conductive element is spaced apart from the at least one outwardly extending grounded portion by a second distance less than the first distance;
an RF signal feed extending from the elongated conductive element; and
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element. - View Dependent Claims (17, 18, 19, 20)
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21. An inverted-F antenna, comprising:
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a ground plane;
an elongated conductive element in adjacent, spaced-apart relationship with the ground plane;
an RF signal feed extending from the elongated conductive element;
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element; and
an inductive element electrically connected to the elongated conductive element adjacent the RF signal feed, wherein the inductive element comprises a plurality of helical turns. - View Dependent Claims (22)
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23. A wireless communicator, comprising:
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a housing configured to enclose a transceiver that transmits and receives wireless communications signals; and
an inverted-F antenna disposed within the housing, comprising;
a first ground plane;
an elongated conductive element capacitively coupled to the first ground plane, wherein the elongated conductive element is in adjacent, spaced-apart relationship with the first ground plane, wherein a first plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a first distance, and wherein a second plurality of segments of the elongated conductive element are spaced apart from the first ground plane by a second distance greater than the first distance;
an RF signal feed extending from the elongated conductive element; and
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A wireless communicator, comprising:
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a housing configured to enclose a transceiver that transmits and receives wireless communications signals; and
an inverted-F antenna disposed within the housing, comprising;
a first ground plane;
an elongated, meandering conductive element capacitively coupled to the first ground plane, wherein the elongated, meandering conductive element is in adjacent, spaced-apart relationship with the first ground plane, wherein the elongated, meandering conductive element comprises a plurality of U-shaped portions that extend towards the first ground plane;
an RF signal feed extending from the elongated, meandering conductive element; and
a ground feed extending from the elongated, meandering conductive element adjacent the RF signal feed and electrically grounding the meandering conductive element. - View Dependent Claims (32, 33, 34)
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35. A wireless communicator, comprising:
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a housing configured to enclose a transceiver that transmits and receives wireless communications signals; and
an inverted-F antenna disposed within the housing, comprising;
a ground plane;
at least one grounded portion extending outwardly from the ground plane;
an elongated conductive element in adjacent, spaced-apart relationship with the ground plane and with the at least one outwardly extending grounded portion, wherein the elongated conductive element is spaced apart from the ground plane by a first distance, and wherein the elongated conductive element is spaced apart from the at least one outwardly extending grounded portion by a second distance less than the first distance;
an RF signal feed extending from the elongated conductive element; and
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element. - View Dependent Claims (36, 37, 38)
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39. A wireless communicator, comprising:
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a housing configured to enclose a transceiver that transmits and receives wireless communications signals; and
an inverted-F antenna disposed within the housing, comprising;
a ground plane;
an elongated conductive element in adjacent, spaced-apart relationship with the ground plane;
an RF signal feed extending from the elongated conductive element;
a ground feed extending from the elongated conductive element adjacent the RF signal feed and electrically grounding the elongated conductive element; and
an inductive element electrically connected to the elongated conductive element adjacent the RF signal feed, wherein the inductive element comprises a plurality of helical turns. - View Dependent Claims (40, 41)
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Specification