Locatable and Autonomously Powered Backscatter Transponder for Registering Measured Variables
AssigneeSiemens Aktiengesellschaft
InventorsDaniel Evers, Peter Gulden, Claus Seisenberger, Leif Wiebking
Life of this patent
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Abstract
There is described a backscatter system comprised of a base station and of a completely passive transponder. The transponder is capable of reading out quantities from sensors and an energy stand-alone manner, of transmitting the readout quantities to the base station, and to carry out a runtime-based and thus highly precise distance measurement between a completely passive tag and base station. The power supply of the transponder ensues from the radio field emitted by the base station.
Claims20
-15. (canceled)
A backscatter transponder, comprising:
- an energy supply to feed the backscatter transponder with energy based upon a HF field of a base station;
- a control device to transmit energy from the energy supply to a sensor to read out measured values of the sensor;
- and
- a distance measuring device to measure contactless a distance between the base station and the backscatter transponder.
A base station for producing and registering radio signals in communication with a backscatter transponder, comprising:
- a receiver to receive a radio signal emitted by a backscatter transponder;
- a transmitter to radiate first radio signals in a first frequency band for supplying the backscatter transponder with energy and to radiate second radio signals in a second frequency band for locating the backscatter transponder;
- and
- a signal processing and driving component.
Dependencies are inferred from the claim text.