Dual frequency antenna
First Claim
1. An apparatus for receiving microwave signals having first and second distinct frequencies, the apparatus comprising:
- a substrate of dielectric material having a selected substrate thickness and having opposed first and second surfaces;
a first grounded layer of electrically conducting material, positioned on the first surface of the substrate;
a first conducting layer of electrically conducting material, positioned on the first surface of the substrate and formed as an annular strip that surrounds and is spaced apart from the first grounded layer;
a second conducting layer of electrically conducting material, positioned in the interior of the substrate, facing and spaced apart from the first grounded layer, and electrically connected to the first conducting layer, said second conducting layer forming a closed, substantially planar geometrical figure having solid, contiguous material between sides of said figure; and
a second grounded layer of electrically conducting material, positioned on the second surface of the substrate so that the second conducting layer is positioned between and spaced apart from the first grounded layer and the second grounded layer.
1 Assignment
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Accused Products
Abstract
An antenna apparatus for receiving two distinct frequencies in the MHz or GHz range. A patch layer of electrically conducting material is positioned in the interior of a dielectric layer that has top and bottom surfaces. First and second ground planes are positioned on the top and bottom surfaces of the substrate, respectively. The patch is electrically connected by plated via holes to an annular strip of conducting material, positioned on the top substrate surface and surrounding the first ground plane. A patch antenna for receiving a first frequency is thus formed by the patch layer and the second ground plane. A cavity antenna for receiving a second frequency is formed from the patch layer, the first ground plane, and the annular strip. Two receiver feed connections, positioned at selected first and second positions on the patch resonator, receive distinct first and second frequencies.
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Citations
32 Claims
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1. An apparatus for receiving microwave signals having first and second distinct frequencies, the apparatus comprising:
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a substrate of dielectric material having a selected substrate thickness and having opposed first and second surfaces; a first grounded layer of electrically conducting material, positioned on the first surface of the substrate; a first conducting layer of electrically conducting material, positioned on the first surface of the substrate and formed as an annular strip that surrounds and is spaced apart from the first grounded layer; a second conducting layer of electrically conducting material, positioned in the interior of the substrate, facing and spaced apart from the first grounded layer, and electrically connected to the first conducting layer, said second conducting layer forming a closed, substantially planar geometrical figure having solid, contiguous material between sides of said figure; and a second grounded layer of electrically conducting material, positioned on the second surface of the substrate so that the second conducting layer is positioned between and spaced apart from the first grounded layer and the second grounded layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for receiving and/or transmitting microwave signals having first and second distinct frequencies, the apparatus comprising:
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a substrate of dielectric material having opposed first and second surfaces; a first ground layer of electrically conducting material positioned on said first surface of the substrate; a second ground layer of electrically conducting material positioned on said second surface of the substrate; a patch of electrically conducting material, said patch being a solid plate which is positioned within said substrate and which is spaced from said second ground layer in substantially parallel relation thereto, said patch cooperative with said second ground layer to define a patch antenna for receiving and transmitting a microwave signal having said first frequency; and an annular strip of electrically conducting material, positioned on said first surface of the substrate and surrounding said first ground layer in spaced relation thereto, said annular strip being electrically coupled to said patch by way of an extension extending from said patch to said annular strip in spaced relation from an outer perimeter of said first ground layer; said first ground layer being cooperative with said patch, said extension, and said annular strip to define a cavity antenna for receiving and transmitting a microwave signal having said second frequency. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification