Crossed-slot antenna for mobile satellite and terrestrial radio reception
AssigneeGeneral Motors Corporation
InventorsDaniel F. Sievenpiper, Hui-Pin Hsu
Life of this patent
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Abstract
A crossed-slot antenna is fabricated using rectangular sheet of metal. A crossed-slot is etched or stamped in the sheet of metal. A feed structure is similarly formed in the sheet of metal. Sidewalls are integrally formed with the sheet of metal and are bent to form a rectangular box. A circuit board is attached to the rectangular box. An air-filled cavity is defined by the sheet of metal, the sidewalls, and the circuit board. Alternatively, a crossed-slot antenna with a solid cavity is fabricated using a sheet of plastic. Ridges are formed in a cross pattern on the sheet of plastic. The sheet of plastic is plated with metal. The metal is removed from a surface of the sheet of plastic, exposing the ridges.
Claims41
A method for fabricating a crossed-slot antenna comprising:
- forming a crossed-slot and a feed structure in a sheet of metal;
- forming sidewalls on the sheet of metal;
- and
- attaching the sidewalls to a circuit board, wherein the sheet of metal, the sidewalls, and the circuit board define an air-filled cavity.
A method for fabricating a crossed-slot antenna with a solid cavity comprising:
- creating first and second intersecting ridges on one side of a sheet of plastic;
- forming a feed aperture in the sheet of plastic:
- plating the sheet of plastic with metal;
- and
- removing the metal plating from the one side to expose the first ridge and the second ridge.
A crossed-slot antenna having an air-filled cavity comprising:
- an electrically conductive structure having a crossed-slot and a feed structure;
- sidewalls integrally formed on the electrically conductive structure;
- a circuit board attached to the sidewalls;
- and
- an air-filled cavity defined by the electrically conductive structure, the sidewalls, and the circuit board.
A crossed-slot antenna with a solid cavity comprising:
- a sheet of plastic plated with a conductive material;
- first and second intersecting ridges formed on the sheet of plastic;
- a feed aperture formed in the sheet of plastic;
- and
- a circuit board attached to the sheet of plastic, wherein the sheet of plastic is a cavity defined by the conductive material and the circuit board.
Dependencies are inferred from the claim text.