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;
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; 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.
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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;
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; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless communication device comprising:
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one of a receiver and a transmitter;
a substrate;
a ground plane formed on the substrate; and
an antenna substantially embedded in the substrate, wherein the antenna includes;
a substantially straight main member, wherein the main member is metal and is embedded in the substrate such that the main member is perpendicular to the ground plane, and the main member has an upper end and a lower end, and the lower end forms an antenna port for coupling the antenna to the one of the receiver and the transmitter;
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; 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.
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18. A method of providing an antenna for a wireless device, the method comprising:
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forming a first metal strip on a first substrate layer;
forming a second metal strip on a second substrate layer;
stacking the first substrate layer on the second substrate layer to form a layered substrate such that the first metal strip is parallel to and spaced apart from the second metal strip, wherein the first metal strip is coupled to the second metal strip with a main antenna member, which is perpendicular to the first metal strip and the second metal strip. - View Dependent Claims (19, 20)
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Specification