Remote-readable identification tag and method for operating the same
AssigneeSiemens Aktiengesellschaft
InventorsMax Guntersdorfer, Helmut Zarschizky, Gerhard Zorn
Life of this patent
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Abstract
A remote-readable identification tag (T) that is provided with at least two resonance circuits (81 . . . 8n) and at least one transmitter/receiver antenna system (1) coupled with the circuits. The at least two circuits have a respectively different resonant frequency. A delay device (6) of the remote-readable identification tag delays a signal response between a signal received by the antenna system and a signal emitted in response by the antenna system, e.g., by delaying feeding the received signal into the resonance circuits.
Claims24
A remote-readable identification tag, comprising:
- at least two resonance circuits which have mutually differing resonance frequencies;
- at least one transmitter-receiver antenna system coupled to the resonance circuits, wherein:
- a signal received by the antenna system is fed into the resonance circuits;
- a resonance signal of at least one of the resonance circuits is emitted via the antenna system;
- and
- identification coding is provided by a multi-bit sequence having a pattern corresponding to the mutually differing resonance frequencies;
- and further comprising:
- a delay device delaying a signal response between receiving the signal by the antenna system and feeding the signal into the resonance circuits.
A method of operating multiple identification tags, comprising:
- receiving a signal with respective transmitter-receiver antenna systems of the multiple identification tags;
- coupling the received signal into respective resonance circuits of the multiple identification tags after passage of respective delay times, wherein the delay times are of respectively different duration for the multiple identification tags;
- generating response signals in the respective resonance circuits;
- and
- outputting the generated signals from the respective transmitter-receiver antenna systems.
A remote-readable identification tag, comprising:
- at least two resonance circuits which have mutually different resonance frequencies;
- at least one transmitter-receiver antenna system coupled to the resonance circuits;
- and
- a delay device delaying a signal response between a signal received by the antenna system and a signal emitted by the antenna system.
A method of operating multiple identification tags, comprising:
- receiving a signal with respective transmitter-receiver antenna systems of the multiple identification tags;
- coupling the received signal into respective resonance circuits of the multiple identification tags;
- generating response signals in the respective resonance circuits;
- and
- outputting the generated signals from the respective transmitter-receiver antenna systems after passage of respective delay times relative to a time the signal was received, wherein the delay times are of respectively different duration for the multiple identification tags.
Dependencies are inferred from the claim text.