Device for reverberation of modes
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
InventorsPeter Kuhn, Philip Schmidt, Frederic Meyer, Gerd Vom Boegel
Life of this patent
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Abstract
A device includes an antenna array with at least four antennas, wherein each antenna has its own feeder line terminal, wherein the feeder line terminals of antennas arranged directly adjacent to one another are geometrically offset from one another by 90° in each case. The device further includes a control device configured to feed the individual antennas via their respective feeder line terminals such that the antenna array exhibits different radiation patterns at different points in time. A first radiation pattern shows a polarized field distribution. According to the invention, a second radiation pattern exhibits an unpolarized field distribution.
Claims17
Device comprising
- an antenna array comprising at least four antennas arranged to be offset from one another, each antenna comprising a feeder line terminal of its own, wherein the feeder line terminals of antennas which are arranged to be directly adjacent to one another exhibit a mutual geometric offset of 90°, respectively,
- a control device configured to feed the individual antennas via their respective feeder line terminals, so that the antenna array exhibits different radiation patterns at different points in time,
- a first radiation pattern comprising a polarized field distribution, and a second radiation pattern comprising an unpolarized field distribution.
RFID-reader with a device comprising
- an antenna array comprising at least four antennas arranged to be offset from one another, each antenna comprising a feeder line terminal of its own, wherein the feeder line terminals of antennas which are arranged to be directly adjacent to one another exhibit a mutual geometric offset of 90°, respectively,
- a control device configured to feed the individual antennas via their respective feeder line terminals, so that the antenna array exhibits different radiation patterns at different points in time,
- a first radiation pattern comprising a polarized field distribution, and a second radiation pattern comprising an unpolarized field distribution.
System with a device comprising
- an antenna array comprising at least four antennas arranged to be offset from one another, each antenna comprising a feeder line terminal of its own, wherein the feeder line terminals of antennas which are arranged to be directly adjacent to one another exhibit a mutual geometric offset of 90°, respectively,
- a control device configured to feed the individual antennas via their respective feeder line terminals, so that the antenna array exhibits different radiation patterns at different points in time,
- a first radiation pattern comprising a polarized field distribution, and a second radiation pattern comprising an unpolarized field distribution,
- and with a three-dimensional body exhibiting at least one recess which defines a space within which the electromagnetic waves emitted by the antenna array propagate.
Dependencies are inferred from the claim text.