Wireless transponder for a security system
First Claim
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1. An apparatus, comprising:
- a first receiver configured to receive a reply signal at a first frequency from a marker positioned remotely from said receiver, and within an interrogation zone for an electronic article surveillance system, and said first receiver to convert said reply signal to a second frequency;
a first transmitter to connect to said receiver, said first transmitter to transmit said reply signal at said second frequency; and
a second receiver configured to receive said reply signal at said second frequency, said second receiver to convert said reply signal from said second frequency to said first frequency, and send said reply signal to a controller.
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Abstract
Method and apparatus for a wireless transponder for a security system are described.
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Citations
26 Claims
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1. An apparatus, comprising:
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a first receiver configured to receive a reply signal at a first frequency from a marker positioned remotely from said receiver, and within an interrogation zone for an electronic article surveillance system, and said first receiver to convert said reply signal to a second frequency; a first transmitter to connect to said receiver, said first transmitter to transmit said reply signal at said second frequency; and a second receiver configured to receive said reply signal at said second frequency, said second receiver to convert said reply signal from said second frequency to said first frequency, and send said reply signal to a controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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a first transmitter to transmit an interrogation signal within an interrogation zone; a marker to generate a reply signal in response to said interrogation signal; a first transponder positioned remotely from said marker which is configured to receive said reply signal at a first frequency, convert said reply signal at said first frequency to said replay signal as a second frequency, and transmit said reply signal at a said second frequency; a first receiver positioned remotely from said marker which is configured to receive said reply signal at said second frequency, and convert said reply signal to said first frequency; and a controller to detect said marker within said interrogation zone using said reply signal at said first frequency, and output a marker detect signal in accordance with said detection. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method, comprising:
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transmitting an interrogation signal in an interrogation zone; generating a reply signal from a marker in response to said interrogation signal; repeating said reply signal by a transponder positioned remotely from said marker by a receiver configured to receive said reply signal at a first frequency; convening said reply signal to a second frequency; and transmitting said reply signal at said second frequency; receiving said reply signal from said transponder by a receiver configured to receive said reply signal at said second frequency; convening said reply signal to said first frequency; sending said reply signal to a controller; and determining whether said marker is within said interrogation zone in accordance with said reply signal. - View Dependent Claims (25, 26)
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Specification