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US 11,121,742 B2Granted
Self-detaching anti-theft device with a multi-purpose transceiver for energy harvesting and communication
AssigneeSensormatic Electronics Corporation
InventorsAdam S. Bergman, Ronald B. Easter, Mohammad Mohiuddin
Life of this patent
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Abstract
Systems and methods for operating a security tag. The methods comprise: performing communication operations by the security tag at a communications frequency; using a receive circuit of the security tag to harvest energy emitted from a transmit circuit of an external device at an energy harvesting frequency. The communications frequency is out of band of the energy harvesting frequency.
Claims16
A method for operating a security tag, comprising:
- performing communication operations by the security tag at a communications frequency;
- using a receive circuit of the security tag to harvest energy emitted from a transmit circuit of an external device at an energy harvesting frequency;
- and
- wherein:
- the communications frequency is out of band of the energy harvesting frequency, and
- the transmit circuit comprises a capacitor, an inductor connected to a first terminal of the capacitor;
- and a voltage source coupled a second terminal of the capacitor and tuned to a frequency of the capacitor and inductor.
4 more elements
A security tag, comprising:
- a transceiver circuit that performs communication operations at a communications frequency, the operations including receiving a wireless signal at a communications frequency and receiving energy at an energy harvesting frequency from a transmit circuit of an external device;
- a receive circuit that facilitates a harvest of energy emitted from the transmit circuit of an external device at an energy harvesting frequency;
- a switch;
- a mechanical component;
- and
- a controller that performs operations to selectively close a switch in response to the wireless signal, causing a release of the mechanical component of the security tag by allowing energy to flow from the receive circuit to the mechanical component when the switch is closed,
- wherein the communications frequency is out of band of the energy harvesting frequency.
4 more elements
Dependencies are inferred from the claim text.