Wireless IC device and electromagnetic coupling module
First Claim
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1. A wireless IC device comprising:
- a wireless IC;
a feeder circuit substrate including a plurality of sheets and a feeder circuit connected to the wireless IC, the feeder circuit including an inductance element;
a radiation plate arranged to radiate a transmission signal supplied from the feeder circuit or supply a reception signal to the feeder circuit; and
a plate-shaped coupling portion connected to the radiation plate;
whereinthe inductance element includes first, second, and third coil conductors connected in series in this order to one another;
each of the first, second, and third coil conductors is disposed on a different one of the plurality of sheets from one another, the plurality of sheets are disposed in planes that are parallel to each other;
the plate-shaped coupling portion faces the second coil conductor;
the feeder circuit is connected to the radiation plate via an electromagnetic coupling between the plate-shaped coupling portion and the second coil conductor; and
the second coil conductor is arranged closer to the plate-shaped coupling portion than the first and third coil conductors with respect to the parallel planes of the plurality of sheets.
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Abstract
A wireless IC device includes a wireless IC chip, a feeder circuit substrate which is coupled to the wireless IC chip and includes a feeder circuit including an inductance element, and a radiation plate. The inductance element includes a plurality of stacked layers having coil conductors electrically connected, and a coil conductor electrically connected in a middle portion of the inductance element is arranged at an end position in the coil axis direction and faces a coupling portion of the radiation plate.
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Citations
17 Claims
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1. A wireless IC device comprising:
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a wireless IC; a feeder circuit substrate including a plurality of sheets and a feeder circuit connected to the wireless IC, the feeder circuit including an inductance element; a radiation plate arranged to radiate a transmission signal supplied from the feeder circuit or supply a reception signal to the feeder circuit; and a plate-shaped coupling portion connected to the radiation plate;
whereinthe inductance element includes first, second, and third coil conductors connected in series in this order to one another; each of the first, second, and third coil conductors is disposed on a different one of the plurality of sheets from one another, the plurality of sheets are disposed in planes that are parallel to each other; the plate-shaped coupling portion faces the second coil conductor; the feeder circuit is connected to the radiation plate via an electromagnetic coupling between the plate-shaped coupling portion and the second coil conductor; and the second coil conductor is arranged closer to the plate-shaped coupling portion than the first and third coil conductors with respect to the parallel planes of the plurality of sheets. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electromagnetic coupling module comprising:
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a wireless IC; and a feeder circuit substrate including a plurality of sheets and a feeder circuit including an inductance element connected to the wireless IC;
whereinthe inductance element includes first, second and third conductors connected in series in this order to one another; each of the first, second, and third coil conductors is disposed on a different one of the plurality of sheets from one another, the plurality of sheets are disposed in planes that are parallel to each other; the second coil conductor is arranged to face a plate-shaped coupling portion connected to a radiation plate such that the feeder circuit is connected to the radiation plate via an electromagnetic coupling between the coupling portion and the second coil conductor; and the second coil conductor is arranged closer to the plate-shaped coupling portion than the first and third coil conductors with respect to the parallel planes of the plurality of sheets. - View Dependent Claims (8, 9, 10, 11)
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12. A wireless IC device comprising:
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a wireless IC; a feeder circuit substrate including a plurality of sheets and a feeder circuit connected to the wireless IC, the feeder circuit including an inductance element; a radiation plate arranged to radiate a transmission signal supplied from the feeder circuit or supply a reception signal to the feeder circuit; and a plate-shaped coupling portion connected to the radiation plate;
whereinthe inductance element includes first, second and third conductors connected in series in this order to one another; the first and third coil conductors are disposed on a common one of the plurality of sheets and the second coil conductor is disposed on a different one of the plurality of sheets from the common one of the plurality of sheets, the common one and the different one are disposed in planes that are parallel to each other; the plate-shaped coupling portion faces the second coil conductor; the feeder circuit is connected to the radiation plate via an electromagnetic coupling between the plate-shaped coupling portion and the second coil conductor; the second coil conductor is arranged closer to the plate-shaped coupling portion than the first and third coil conductors with respect to the parallel planes of the common one and the different one of the plurality of sheets; and a coil axis of the inductance element extends in a direction parallel or substantially parallel to a stacking direction of the plurality of sheets. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification