Multiple band circularly polarized microstrip antenna
First Claim
1. An antenna assembly for communicating electromagnetic radiation comprising:
- (a) ground plane means;
(b) first antenna element means, for communicating at a first frequency band, comprising a generally elliptical lamina of electrically conducting material, separated from said ground plane means;
(c) second antenna element means, for communicating at a second frequency band, comprising a generally elliptical lamina of electrically conducting material, positioned generally between said first antenna element means and said ground plane means, and separated from both said first antenna element means and said ground plane means;
(d) feed means, comprising electrical conducting means contacting said first antenna element means at a feed point, communicating through, said electrically insulated from, said second antenna element means and said ground plane means; and
(e) conducting means for electrically connecting said second antenna element means with said ground plane means.
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Accused Products
Abstract
Disclosed is a multiple band antenna assembly for communicating electromagnetic radiation. An antenna element stack is constructed of a plurality of elliptical lamina antenna elements mutually separated by layers of dielectric material, and separated from a ground plane by dielectric material. The antenna assembly is coupled through a feed line in contact with the top antenna element. A conductor joins the remaining antenna elements to the ground plane. Each individual antenna element is operable for communication reception and transmission within a frequency band determined by the size of the particular antenna element. The antenna elements are arranged in order of decreasing size with the largest antenna element closest to the ground plane. The sizes of the antenna elements may be selected to provide electromagnetic radiation communication over several distinct frequency bands, or to connect the individual bands into a broad band.
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Citations
20 Claims
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1. An antenna assembly for communicating electromagnetic radiation comprising:
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(a) ground plane means; (b) first antenna element means, for communicating at a first frequency band, comprising a generally elliptical lamina of electrically conducting material, separated from said ground plane means; (c) second antenna element means, for communicating at a second frequency band, comprising a generally elliptical lamina of electrically conducting material, positioned generally between said first antenna element means and said ground plane means, and separated from both said first antenna element means and said ground plane means; (d) feed means, comprising electrical conducting means contacting said first antenna element means at a feed point, communicating through, said electrically insulated from, said second antenna element means and said ground plane means; and (e) conducting means for electrically connecting said second antenna element means with said ground plane means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An antenna assembly for communicating generally elliptically polarized electromagnetic radiation comprising:
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(a) a ground plane; (b) a plurality of antenna elements, each in the form of a generally elliptical lamina of electrically conducting material, and a like plurality of dielectric layers, with the dielectric layers and the antenna elements arranged in a stack with the ground plane, with a dielectric layer adjacent the ground plane and the dielectric layers and the antenna elements arranged in alternating order, and with the antenna elements arranged in order of decreasing size of semimajor axis relative to the ground plane, the geometric center of all the antenna elements lying generally along a straight line perpendicular to the ground plane; (c) a feed line connected, at a feed point, to the antenna element of smallest semimajor axis; and (d) conducting means connecting the ground plane to the centers of all of the antenna elements except the antenna element of smallest semimajor axis. - View Dependent Claims (16)
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17. A method of communicating electromagnetic radiation comprising the steps of:
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(a) providing a plurality of antenna elements, each of electrically conducting material and in the form of a generally elliptical lamina; (b) providing a ground plane of generally conducting material; (c) stacking said antenna elements and said ground plane with said antenna elements arranged in order of decreasing size of semimajor axis relative to the ground plane, and with dielectric layers alternating with said ground plane and said antenna elements in said stack; (d) connecting said ground plane with the geometric centers of the elliptical laminae of said plurality of antenna elements, except for the antenna element farthest from said ground plane; and (e) connecting a feed line to the antenna element farthest from said ground plane. - View Dependent Claims (18, 19, 20)
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Specification