WIRELESS IC DEVICE
First Claim
1. A wireless IC device comprising:
- a radiating plate including a linear electrode bent at a predetermined position so as to be apparently sectioned into two linear electrode portions having different lengths, both ends of the linear electrode being open;
a wireless IC arranged to process transmitted/received signals; and
a feeding circuit board including a feeding circuit arranged to match impedance of the wireless IC with impedance of the radiating plate and/or set resonant frequencies of the transmitted/received signals;
whereinthe wireless IC is coupled with the feeding circuit so as to define an electromagnetically coupled module;
the electromagnetically coupled module is arranged such that the feeding circuit board and the two linear electrode portions of the radiating plate are electromagnetically coupled; and
the wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate.
1 Assignment
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Accused Products
Abstract
A wireless IC device that is operable in a wide band and is suitable for RFID systems includes a radiating plate and an electromagnetically coupled module constituted by a wireless IC that processes transmitted/received signals and a feeding circuit board having a feeding circuit and coupled with the wireless IC. The radiating plate includes a linear electrode bent at a bent portion and apparently sectioned into two linear electrode portions having different lengths. The electromagnetically coupled module is arranged such that the feeding circuit board and the linear electrode portions are electromagnetically coupled. The wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate.
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Citations
16 Claims
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1. A wireless IC device comprising:
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a radiating plate including a linear electrode bent at a predetermined position so as to be apparently sectioned into two linear electrode portions having different lengths, both ends of the linear electrode being open; a wireless IC arranged to process transmitted/received signals; and a feeding circuit board including a feeding circuit arranged to match impedance of the wireless IC with impedance of the radiating plate and/or set resonant frequencies of the transmitted/received signals;
whereinthe wireless IC is coupled with the feeding circuit so as to define an electromagnetically coupled module; the electromagnetically coupled module is arranged such that the feeding circuit board and the two linear electrode portions of the radiating plate are electromagnetically coupled; and the wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate. - View Dependent Claims (2, 3)
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4. A wireless IC device comprising:
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a radiating plate including two linear electrode portions disposed side by side so as to form a helix, both ends of the linear electrode portions being open; and a wireless IC chip arranged to process transmitted/received signals;
whereina terminal electrode of the wireless IC chip is electrically connected to each of the open ends of the linear electrode portions in a central portion of the helix. - View Dependent Claims (5, 6, 7, 8)
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9. A wireless IC device comprising:
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a radiating plate including a linear electrode apparently sectioned into two linear electrode portions disposed side by side so as to form a double helix, both ends of the linear electrode being open; a wireless IC arranged to process transmitted/received signals; and a feeding circuit board including a feeding circuit arranged to match impedance of the wireless IC with impedance of the radiating plate and/or set resonant frequencies of the transmitted/received signals;
whereinthe wireless IC is coupled with the feeding circuit so as to form an electromagnetically coupled module; the electromagnetically coupled module is arranged such that the feeding circuit board and the two linear electrode portions of the radiating plate are electromagnetically coupled; and the wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate. - View Dependent Claims (10, 11, 12, 13)
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14. A wireless IC device comprising:
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a radiating plate including a linear electrode apparently sectioned into two linear electrode portions disposed side by side so as to form a meandering shape, both ends of the linear electrode being open; a wireless IC arranged to process transmitted/received signals; and a feeding circuit board including a feeding circuit arranged to match impedance of the wireless IC with impedance of the radiating plate and/or set resonant frequencies of the transmitted/received signals;
whereinthe wireless IC is coupled with the feeding circuit so as to define an electromagnetically coupled module; the electromagnetically coupled module is arranged such that the feeding circuit board and the two linear electrode portions of the radiating plate are electromagnetically coupled; and the wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate. - View Dependent Claims (15, 16)
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Specification