Cavity antenna with reactive surface loading
First Claim
Patent Images
1. An antenna assembly for a communication device, the assembly comprising:
- a feed structure, which has front and rear sides, and which is coupled to be driven by the device so as to radiate an electromagnetic field in a given frequency band; and
an electrically reactive surface which is positioned adjacent to the rear side of the feed structure so as to define a cavity between the feed structure and the reactive surface, thereby substantially nulling the electromagnetic field on the rear side of the feed structure.
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Abstract
An antenna assembly (30) for a communication device (20) includes a feed structure (25), which has front and rear sides (26, 27), and which is coupled to be driven by the device so as to radiate an electromagnetic field in a given frequency band. An electrically reactive surface (28) is positioned adjacent to the rear side of the feed structure so as to define a cavity (35) between the feed structure and the reactive surface, thereby substantially nulling the electromagnetic field on the rear side of the feed structure.
70 Citations
58 Claims
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1. An antenna assembly for a communication device, the assembly comprising:
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a feed structure, which has front and rear sides, and which is coupled to be driven by the device so as to radiate an electromagnetic field in a given frequency band; and
an electrically reactive surface which is positioned adjacent to the rear side of the feed structure so as to define a cavity between the feed structure and the reactive surface, thereby substantially nulling the electromagnetic field on the rear side of the feed structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for wireless communication using a communication device operating in a given frequency band, the method comprising:
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coupling a feed structure, having a front side and a rear side, to the communication device, so that the feed structure can be driven by the device to radiate an electromagnetic field in the given frequency band; and
positioning an electrically-reactive surface adjacent to the rear side of the feed structure, so as to define a cavity between the feed structure and the reactive surface, thereby substantially nulling the electromagnetic field on the rear side of the feed structure. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification