Miniature vertically polarized multiple frequency band antenna and method of providing an antenna for a wireless device
First Claim
1. An antenna comprising:
- a substantially straight main member, wherein the main member is metal and is embedded in a substrate, the main member generally perpendicular to a plane of the substrate and passing through a portion of the substrate;
a first lateral member, a central part of which is electrically coupled to an upper end of the main member such that the main member and the first lateral member generally form a T shape, the first lateral member having a generally rectangular shape when viewed from above the T shape;
a second lateral member, a central part of which is electrically coupled to the main member, wherein the second lateral member is spaced from and parallel to the first lateral member, and the second lateral member is embedded in the substrate; and
a turning circuit coupled to the antenna for varying resonance of the antenna, wherein the first lateral member and the turning circuit are located on a same layer of the substrate.
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Accused Products
Abstract
A miniature vertically polarized multi-frequency antenna 10 is embedded in a substrate 11 and suitable for use within a wireless device. The antenna 10 includes a first lateral member 14 and a second lateral member 16, which is spaced from and parallel to the first lateral member 14. The antenna 10 has a wide tuning range due to multiple resonances provided by the lateral members 14, 16. The antenna 10 is shortened by reactive loading and by embedding the antenna in material having a high dielectric constant. Tuning circuits 30, 32 are coupled to respective ends of one of the lateral members 14, 16. The tuning circuits are located on a common plane with the lateral member to which they are connected. The tuning circuits 30, 32 electronically add reactance to the antenna to alter the frequency at which it resonates. A method of providing the antenna 10 includes forming flat metal strips 14, 16 on layers of a laminated substrate 11 and forming the second lateral member 16 between adjacent layers 20, 22 of the substrate 11.
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Citations
20 Claims
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1. An antenna comprising:
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a substantially straight main member, wherein the main member is metal and is embedded in a substrate, the main member generally perpendicular to a plane of the substrate and passing through a portion of the substrate; a first lateral member, a central part of which is electrically coupled to an upper end of the main member such that the main member and the first lateral member generally form a T shape, the first lateral member having a generally rectangular shape when viewed from above the T shape; a second lateral member, a central part of which is electrically coupled to the main member, wherein the second lateral member is spaced from and parallel to the first lateral member, and the second lateral member is embedded in the substrate; and a turning circuit coupled to the antenna for varying resonance of the antenna, wherein the first lateral member and the turning circuit are located on a same layer of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An antenna comprising:
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a substantially straight main member, wherein the main member is metal and is embedded in a substrate, the main member generally perpendicular to a plane of the substrate and passing through a portion of the substrate; a first lateral member, a central part of which is electrically coupled to an upper end of the main member such that the main member and the first lateral member generally form a T shape, the first lateral member having a generally rectangular shape when viewed from above the T shape; a second lateral member, a central part of which is electrically coupled to the main member, wherein the second lateral member is spaced from and parallel to the first lateral member, and the second lateral member is embedded in the substrate; and a tuning circuit comprising a first tuning circuit coupled to a first end of the second lateral member and a second tuning circuit coupled to a second end of the second lateral member. - View Dependent Claims (12, 13, 14, 15)
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16. An antenna comprising:
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a substantially straight main member, wherein the main member is metal and is embedded in a substrate, the main member generally perpendicular to a plane of the substrate and passing through a portion of the substrate; a first lateral member, a central part of which is electrically coupled to an upper end of the main member such that the main member and the first lateral member generally form a T shape, the first lateral member having a generally rectangular shape when viewed from above the T shape; and a second lateral member, a central part of which is electrically coupled to the main member, wherein the second lateral member is spaced from and parallel to the first lateral member, and the second lateral member is embedded in the substrate, wherein the substrate includes an upper ground plane and a lower ground plane, and the first lateral member is coplanar with the upper ground plane. - View Dependent Claims (17, 18, 19, 20)
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Specification