Wireless IC device
First Claim
1. A wireless IC device, comprising:
- a wireless IC arranged to process a radio signal;
a feeder circuit board including a feeder circuit that includes an inductance element; and
a loop electrode including at least two adjacent open ends;
whereinthe feeder circuit board includes a magnetic body that includes a magnetic material;
the inductance element is disposed in the magnetic body;
the loop electrode is disposed directly on an outer exposed surface of the magnetic body of the feeder circuit board;
the loop electrode is electromagnetically coupled to the inductance element via the magnetic body such that the inductance element is connected or coupled between the wireless IC and the loop electrode and the wireless IC is connected to the loop electrode via the feeder circuit; and
the radio signal processed by the wireless IC is transmitted from the wireless IC to the inductance element, from the inductance element to the loop electrode, and then radiated from the loop electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless IC device has a resonant frequency that is hardly altered or affected by external influences and reliably communicates with a reader/writer. The wireless IC device includes a wireless IC chip arranged to process a radio signal, a feeder circuit board coupled to the wireless IC chip and including a feeder circuit, and a radiation electrode arranged at least one principal surface of the feeder circuit board. The feeder circuit board includes a magnetic material and has the feeder circuit disposed therein. The radiation electrode is disposed on at least one principal surface of the feeder circuit board so as to be electromagnetically coupled to the feeder circuit and includes at least two open ends. The wireless IC chip is coupled to the radiation electrode through the feeder circuit and communicates with a reader/writer using HF band frequency.
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Citations
10 Claims
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1. A wireless IC device, comprising:
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a wireless IC arranged to process a radio signal; a feeder circuit board including a feeder circuit that includes an inductance element; and a loop electrode including at least two adjacent open ends;
whereinthe feeder circuit board includes a magnetic body that includes a magnetic material; the inductance element is disposed in the magnetic body; the loop electrode is disposed directly on an outer exposed surface of the magnetic body of the feeder circuit board; the loop electrode is electromagnetically coupled to the inductance element via the magnetic body such that the inductance element is connected or coupled between the wireless IC and the loop electrode and the wireless IC is connected to the loop electrode via the feeder circuit; and the radio signal processed by the wireless IC is transmitted from the wireless IC to the inductance element, from the inductance element to the loop electrode, and then radiated from the loop electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification