System and method for detecting objects and communicating information
First Claim
1. A system for detecting an object, said system comprising:
- (1) an ultra wideband transmitter for transmitting an ultra wideband probe signal;
(2) a tag device associated with the object and located proximal to the object, the tag device further comprising;
an antenna for receiving the ultra wideband probe signal;
a switch coupled to the antenna, said switch for modulating the probe signal received by the antenna and reflecting a portion of said signal back to the antenna; and
a controller coupled to the switch, said controller causing the switch to modulate the reflected signal in accordance with a time sequence pattern; and
(3) an ultra wideband receiver for receiving the modulated reflected signal and identifying the time sequence pattern.
1 Assignment
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Accused Products
Abstract
A system and method for locating objects and/or receiving data associated with an object. An antenna or similar device that can intercept or modify RF energy is caused to vary its properties in accordance with a predefined time sequence pattern that is associated with the object. The antenna device is located proximate to the object to be located. To locate the object, a wide band radar device is utilized to transmit a probe signal and receive and analyze the return signal to identify the predefined pattern and determine the range to the antenna and thus determine the range to the associated object. The time sequence pattern is optionally modulated by a data stream to convey data associated with the object.
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Citations
20 Claims
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1. A system for detecting an object, said system comprising:
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(1) an ultra wideband transmitter for transmitting an ultra wideband probe signal;
(2) a tag device associated with the object and located proximal to the object, the tag device further comprising;
an antenna for receiving the ultra wideband probe signal;
a switch coupled to the antenna, said switch for modulating the probe signal received by the antenna and reflecting a portion of said signal back to the antenna; and
a controller coupled to the switch, said controller causing the switch to modulate the reflected signal in accordance with a time sequence pattern; and
(3) an ultra wideband receiver for receiving the modulated reflected signal and identifying the time sequence pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting an object comprising:
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transmitting an ultra wideband signal toward an antenna;
modulating the impedance of a load connected to the antenna; and
receiving a reflected ultra wideband signal, said reflected ultra wideband signal being reflected from the load and having modulation resulting from the modulation of the impedance of the load; and
detecting the modulation of the reflected ultra wideband signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification