Wireless IC device
First Claim
1. A wireless IC device comprising:
- a high-frequency device including a wireless IC chip, the high-frequency device is arranged to receive or transmit high-frequency signals in the UHF frequency band;
a radiation element defining a radiator;
a loop electrode coupled to the high-frequency device and the radiation element, and including a loop plane perpendicular or inclined relative to a plane of the radiation element;
whereinthe wireless IC chip and the loop electrode are electrically connected or electromagnetically coupled to one another;
the loop electrode is arranged to generate a magnetic field in a direction parallel or substantially parallel to the plane of the radiation element and to induce an electric field in a direction perpendicular or substantially perpendicular to the plane of the radiation element such that electric field loops induce magnetic field loops and the loop electrode and the radiation element are electromagnetically coupled to one another.
1 Assignment
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Accused Products
Abstract
A wireless-IC-device main component is disposed on a surface opposite to a surface for receiving signals from a reader/writer. The wireless-IC-device main component includes an insulating substrate, which is provided with a loop electrode and an electromagnetically coupled module coupled to the loop electrode. A signal from the reader/writer causes an eddy current to flow across a conductor principal plane of a metal article. The eddy current causes a magnetic field to be generated in a direction perpendicular or substantially perpendicular to the conductor principal plane of the metal article. Then, the loop electrode is coupled to the magnetic field. Thus, the wireless-IC-device main component functions as an RFID tag even for signals from the principal plane opposite to the wireless-IC-device main component. Thus, it is possible to reduce the cost of manufacturing a metal article, and to provide a wireless IC device using the metal article as a radiator.
87 Citations
14 Claims
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1. A wireless IC device comprising:
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a high-frequency device including a wireless IC chip, the high-frequency device is arranged to receive or transmit high-frequency signals in the UHF frequency band; a radiation element defining a radiator; a loop electrode coupled to the high-frequency device and the radiation element, and including a loop plane perpendicular or inclined relative to a plane of the radiation element;
whereinthe wireless IC chip and the loop electrode are electrically connected or electromagnetically coupled to one another; the loop electrode is arranged to generate a magnetic field in a direction parallel or substantially parallel to the plane of the radiation element and to induce an electric field in a direction perpendicular or substantially perpendicular to the plane of the radiation element such that electric field loops induce magnetic field loops and the loop electrode and the radiation element are electromagnetically coupled to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification