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US 8,525,733 B2Granted
Low-profile wide-bandwidth radio frequency antenna
AssigneeApple Inc.
InventorsDean Kitchener, Andrew Urquhart
Life of this patent
Estimating the term…
Abstract
The present invention relates to an RE antenna structure that includes a planar structure and a loading plate, such that the planar structure is mounted between a ground plane and the loading plate to form an RF antenna. The loading plate may be about parallel to the ground plane and the planar structure may be about perpendicular to the loading plate and the ground plane. The loading plate may allow the height of the RF antenna structure above the ground plane to be relatively small. For example, the height may be significantly less than one-quarter of a wavelength of RF signals of interest. The planar structure may include two conductive matching elements to help increase the bandwidth of the RF antenna structure.
Claims20
An antenna structure, comprising:
- a ground plane;
- a loading plate spaced from the ground plane in a direction substantially perpendicular to the ground plane and extending substantially parallel to the ground plane;
- a first conductive matching element extending from the loading plate toward the ground plane, wherein the first conductive matching element is electrically connected to the loading plate and is electrically isolated from the ground plane;
- a first conductive element extending from the loading plate toward the ground plane;
- and
- a second conductive matching element extending from the first conductive element spaced from and between the ground plane and the loading plate;
- wherein the first conductive matching element, the first conductive element and the second conductive matching element are in a common plane, the common plane extending substantially perpendicular to the loading plate and the ground plane, wherein the first conductive matching element, the first conductive element and the second conductive matching element comprise an integral conductive structure, and wherein the integral conductive structure further comprises a second conductive element extending along the common plane from the first conductive element to the first conductive matching element.
4 more elements
An antenna structure, comprising:
- a ground plane;
- a loading plate spaced from the ground plane in a direction substantially perpendicular to the ground plane and extending substantially parallel to the ground plane;
- a first conductive matching element extending from the loading plate toward the ground plane, wherein the first conductive matching element is electrically connected to the loading plate and is electrically isolated from the ground plane;
- a first conductive element extending from the loading plate toward the ground plane;
- and
- a second conductive matching element extending from the first conductive element spaced from and between the ground plane and the loading plate;
- wherein the first conductive matching element, the first conductive element and the second conductive matching element are in a common plane, the common plane extending substantially perpendicular to the loading plate and the ground plane, wherein the first conductive matching element, the first conductive element and the second conductive matching element comprise an integral conductive structure, and wherein the integral conductive structure further comprises a first dual band conductive element extending along the common plane from the second conductive matching element toward the ground plane.
4 more elements
An antenna structure, comprising:
- a ground plane;
- a loading plate spaced from the ground plane in a direction substantially perpendicular to the ground plane and extending substantially parallel to the ground plane;
- a first conductive matching element extending from the loading plate toward the ground plane, wherein the first conductive matching element is electrically connected to the loading plate and is electrically isolated from the ground plane;
- a first conductive element extending from the loading plate toward the ground plane;
- and
- a second conductive matching element extending from the first conductive element spaced from and between the ground plane and the loading plate;
- wherein the first conductive matching element, the first conductive element and the second conductive matching element are in a common plane, the common plane extending substantially perpendicular to the loading plate and the ground plane, wherein the first conductive matching element, the first conductive element and the second conductive matching element comprise an integral conductive structure, and wherein the integral conductive structure further comprises a third conductive element electrically connected to the first conductive matching element and extending from the first conductive matching element along the common plane towards the ground plane.
4 more elements
Dependencies are inferred from the claim text.