Patent ID: 9460376
Filing Date: 2016-10-04
CPC Classification: G06K,H01L,H01Q,H05K

Claim Text:
1. A radio IC device comprising: a high frequency device defined by a radio IC arranged to process transmitted and received signals and a feed circuit including an inductance element electrically connected to or electromagnetically coupled to the radio IC; and a radiation plate arranged so as to be coupled to the high frequency device, the radiation plate being defined by a planar ground electrode disposed on or in a printed wiring board; wherein the feed circuit includes at least one of a resonance circuit and a matching circuit including the inductance element through which the radio IC is operated by a signal received by the radiation plate, and through which an answer signal from the radio IC is radiated from the radiation plate to the outside; the inductance element of the feed circuit is electromagnetically coupled to at least one of an edge of the radiation plate or a corner of the radiation plate, so as to intersect with a magnetic field generated by current flowing through the edge or the corner of the radiation plate; and a wiring electrode is provided on the printed wiring board, the wiring electrode and the ground electrode are isolated from each other, and the feed circuit is arranged across a region between the wiring electrode and the ground electrode.