Low profile slot antenna using backside fed frequency selective surface
First Claim
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1. An antenna structure comprising:
- (a) a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the conductive plane having an opening therein; and
(b) an antenna driving element disposed adjacent the opening in the conductive plane on a side of the conductive plane which is remote from said array of conductive elements, which driving element, in operation, excites the antenna structure by pumping RF energy through the opening in the conductive plane.
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Abstract
A low profile, wide band gap antenna having a high impedance surface, the high impedance surface including a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 10% of a wavelength of an operating frequency of the antenna structure. The conductive plane has an opening therein which is driven by an antenna driving element adjacent the opening in the conductive plane.
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Citations
46 Claims
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1. An antenna structure comprising:
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(a) a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the conductive plane having an opening therein; and
(b) an antenna driving element disposed adjacent the opening in the conductive plane on a side of the conductive plane which is remote from said array of conductive elements, which driving element, in operation, excites the antenna structure by pumping RF energy through the opening in the conductive plane. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna structure comprising:
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(a) a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the array of conductive elements being arranged with a common pitch in said array, the conductive plane having an opening therein; and
(b) an antenna driving element disposed adjacent the opening in the conductive plane, which driving element, in operation, excites the antenna structure by pumping RF energy through the opening in the conductive plane;
wherein the opening in the conductive plane is rectangular, having a breadth which is about 0.5 of a wavelength to one wavelength of the operating frequency of the antenna structure and a width which is no greater than the common pitch of the conductive elements in the array. - View Dependent Claims (9, 10, 11, 12)
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13. A method of making an antenna comprising:
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(a) providing a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the conductive plane having an opening therein; and
(b) disposing an antenna driving element adjacent the opening in the conductive plane on a side of said conductive plane which is remote from said array of conductive elements. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of making an antenna comprising:
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(a) providing a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure the array of conductive elements being arranged with a common pitch in said array the conductive plane having an opening therein; and
(b) disposing an antenna driving element adjacent the opening in the conductive plane;
wherein the opening formed in the conductive plane is rectangular, having a breadth which is about 0.5 of a wavelength of the operating frequency of the antenna structure and a width which is no greater than the common pitch of the conductive elements in the array. - View Dependent Claims (22, 23, 24, 25)
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26. An antenna structure comprising:
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(a) a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the conductive plane having a waveguide opening therein; and
(b) a waveguide disposed adjacent the opening in the conductive plane, which waveguide, in operation, excites the antenna structure by pumping RF energy through the waveguide opening in the conductive plane. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of making an antenna comprising:
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(a) providing a high impedance surface, the high impedance surface having a conductive plane and an array of conductive elements spaced from the conductive plane by a distance which is no greater than 25% of a wavelength of an operating frequency of the antenna structure, the conductive plane having a waveguide opening therein; and
(b) disposing a waveguide adjacent the waveguide opening in the conductive plane. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification