Compact antenna with circular polarization
First Claim
1. A circulation polarization antenna assembly for a wireless communications device having a signal line and a ground plane, said antenna assembly comprising,a plurality of symmetrically configured conductor elements, each including a first conductor surface being substantially parallel to the ground plane and a side element being substantially perpendicular to the ground plane, each of said plurality of conductor elements being oriented generally orthogonally relative to adjacent pairs of said plurality of conductor elements, each of said plurality of conductor elements being electrically coupled to the ground plane;
- and a feed conductor which operatively couples an adjacent pair of the plurality of conductor elements to the signal line.
1 Assignment
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Accused Products
Abstract
An efficient antenna exhibiting primarily circular polarization is described. Electrical performance is similar to that of a patch antenna having the same volume; however, greater bandwidth is achieved. The antenna consists of four radiating elements arranged in a semi-spiral configuration on a dielectric material, with a shunt feed system. The novel feed system incorporates a phase delay line, with two adjacent elements fed. The other two elements are parasitically coupled to the first two, with a 180 degree phase difference, resulting in a progressive phase shift of 90 degrees between the four elements. Circular polarization is a product of the symmetric geometry, as opposed to a circularly polarized patch antenna, which utilizes an offset feed. The antenna may be placed directly on a printed wiring board having a ground plane. The antenna is well suited for GPS applications and has a smaller major surface area than a patch antenna with comparable performance.
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Citations
19 Claims
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1. A circulation polarization antenna assembly for a wireless communications device having a signal line and a ground plane, said antenna assembly comprising,
a plurality of symmetrically configured conductor elements, each including a first conductor surface being substantially parallel to the ground plane and a side element being substantially perpendicular to the ground plane, each of said plurality of conductor elements being oriented generally orthogonally relative to adjacent pairs of said plurality of conductor elements, each of said plurality of conductor elements being electrically coupled to the ground plane; - and
a feed conductor which operatively couples an adjacent pair of the plurality of conductor elements to the signal line. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A compact circular polarization antenna assembly for a wireless communications device having a signal line and a ground plane, said antenna assembly comprising:
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a plurality of conductor elements each having a first conductor surface being generally parallel with the ground plane and a second conductor surface being generally perpendicular to the ground plane, each of the plurality of conductor elements being coupled to the ground plane, said first conductor surfaces being provided in a circularly-nested orientation; and
a feed conductor which operatively couples an adjacent pair of the plurality of conductor elements to the signal line. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A compact circular polarization antenna assembly for a wireless communications device having a signal line and a ground plane, said antenna assembly comprising:
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a dielectric substrate element having a plurality of sides;
a plurality of conductor elements each having a first conductor surface being generally parallel with the ground plane and a second conductor surface being generally perpendicular to the ground plane, each of the plurality of conductor elements being coupled to the ground plane, each of the plurality of conductor elements being associated with a different one of the plurality sides of the dielectric substrate element;
said first conductor surfaces being provided in a circularly-nested orientation; and
a feed conductor which operatively couples an adjacent pair of the plurality of conductor elements to the signal line. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification