BI-DIRECTIONAL AND MULTI-FREQUENCY RF SIGNALING SYSTEM
First Claim
Patent Images
1. An active bidirectional tag for use with a base station in a Radio Frequency signaling system, the tag comprising:
- at least a first antenna for receiving a detection signal emitted from the base station at a first frequency;
a control circuit for storing identification data and providing the identification data on an information signal when activated by the detection signal; and
at least a second antenna adapted for transmitting the information signal at a second frequency to the base station.
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Abstract
There is described herein an active bidirectional tag for use in an RF signaling system for real-time and non-real time localization. The tag has a first antenna that operates at a first frequency and a second antenna that operates at a second frequency. The two antennas allow the tag to perform more than one function concurrently, and to provide different ranges of communication between the two antennas. The tag is low cost, low power, and multi-use.
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Citations
20 Claims
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1. An active bidirectional tag for use with a base station in a Radio Frequency signaling system, the tag comprising:
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at least a first antenna for receiving a detection signal emitted from the base station at a first frequency; a control circuit for storing identification data and providing the identification data on an information signal when activated by the detection signal; and at least a second antenna adapted for transmitting the information signal at a second frequency to the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A Radio Frequency signaling system comprising:
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a base station having at least a first antenna and a second antenna, the first antenna adapted for transmission of a detection signal at a first frequency and reception of a reflection of the detection signal at the first frequency, the second antenna adapted for reception of an information signal at a second frequency; and an active, bidirectional tag having at least a third antenna and a fourth antenna, the third antenna adapted for receiving the detection signal at the first frequency, the fourth antenna adapted for transmitting the information signal at the second frequency.
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Specification