Nuisance cell phone locator
AssigneeKroll Family Trust
InventorMark W. Kroll
Life of this patent
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Abstract
This invention covers the use of multiple internal antennas to locate a nuisance cell phone which is being inappropriately operated. For a largely 1-dimensional layout like an airplane, an embodiment teaches the location being done by using differential timing teaches the use of either differential timing or a bearing angle technique. For a largely 2-dimensional layout, such as a theater, the invention uses either differential timing or a bearing angle approach.
Claims11
A method of locating nuisance cellular telephones consisting of the steps of:
- a) installing at least two radio frequency direction finding systems inside of a public building;
- b) monitoring for signals with cellular telephone frequencies;
- c) calculating an angle-of-origin to a source of such frequencies;
- and
- d) calculating the location of the source from the angles-of-origin, wherein the angle-of-origin is determined by phase differential-to-amplitude response.
A system for locating a nuisance cellular telephone in a public place comprising:
- at least two direction finding units;
- a controller operably connected to the at least two direction finding units;
- and
- a display operably connected to the controller, wherein the controller calculates the location of the nuisance cellular telephone using phase differential-to-amplitude response.
A method of locating nuisance cellular telephones comprising:
- installing at least two radio frequency direction finding systems inside of a public building;
- monitoring for signals with cellular telephone frequencies;
- calculating an angle-of-origin to a source of such frequencies;
- and
- calculating the location of the source from the angles-of-origin, wherein the angle-of-origin is determined by phase differential-to-amplitude response.
Dependencies are inferred from the claim text.