Antenna device, radio identification system and method for emitting a radio signal
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsLars WEISGERBER, Wolfram STRAUSS, Mario SCHUEHLER, Alexander POPUGAEV, Rainer WANSCH, Josef BERNHARD
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Abstract
An antenna device has a radiating unit having a plurality of antennas, configured to emit a radio signal with a radiation pattern. In addition, the antenna device has a calculator configured to generate and to apply to the plurality of antennas a plurality of feed signals based on an identification signal provided in order to generate the radio signal. The calculator is additionally configured to control the feed signals in a time-varying manner so that the radio signal is emitted with a time-varying radiation pattern.
Claims20
An antenna device comprising:
- a radiating unit comprising a plurality of antennas, configured to emit a radio signal with a radiation pattern;
- and
- a calculator configured to generate and apply to the plurality of antennas a plurality of feed signals based on an identification signal provided in order to generate the radio signal;
- wherein the calculator is further configured to control the feed signals in a time-varying manner in order to emit the radio signal with a time-varying radiation pattern;
- and
- wherein the calculator comprises a terminal and is configured to acquire the identification signal from an external radio identification reader at the terminal.
A method comprising:
- acquiring an identification signal from an external radio identification reader at a terminal;
- emitting a radio signal which comprises a radiation pattern using a radiating unit comprising a plurality of antennas;
- generating a plurality of feed signals based on the identification signal and applying the feed signals to the plurality of antennas in order to generate the radio signal;
- and
- time-varyingly controlling the feed signals so that the radio signal is emitted with a time-varying radiation pattern.
Dependencies are inferred from the claim text.