US 8,552,870 B2 · Wireless IC device

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.

Claims13

Dependent claims

A wireless IC device comprising:

a high-frequency device defined by an electromagnetically coupled module or a wireless IC chip, the electromagnetically coupled module including the wireless IC chip and a feed circuit board coupled to an external circuit and electrically connected to or electromagnetically coupled to the wireless IC chip;
a loop electrode coupled to the high-frequency device;
an insulation sheet on which the high-frequency device and the loop electrode are arranged;
and
a radiation electrode coupled to the loop electrode, said radiation electrode defining a radiator;
wherein
the insulation sheet has a plane bonded to a plane of the radiation electrode by being separated into different directions at one end such that a loop plane of the loop electrode is perpendicular or inclined relative to the plane of the radiation electrode by being bonded to the plane of the radiation electrode;
and
the loop electrode is provided near inside an area of the radiation electrode.

6 more elements

Dependencies are inferred from the claim text.

Wireless IC device

Life of this patent

Wireless IC device

Life of this patent

Abstract

Claims13