Wireless IC device, electronic apparatus, and method for adjusting resonant frequency of wireless IC device
First Claim
1. A wireless IC device comprising:
- a wireless IC chip that includes input/output terminal electrodes and processes a transmission/reception signal;
a printed wiring circuit board on which the wireless IC chip is mounted;
a ground electrode provided on the printed wiring circuit board; and
a loop electrode including first and second ends and provided on the printed wiring circuit board so as to be coupled to the wireless IC chip and the ground electrode, whereinthe loop electrode is coupled to the input/output terminal electrodes of the wireless IC chip at the first and second ends and is coupled to the ground electrode; and
the ground electrode includes a slit and/or a cutout arranged to adjust a resonant frequency thereof.
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Accused Products
Abstract
A wireless IC device and an electronic apparatus are obtained, which can achieve miniaturization and improve the gain of a radiator plate (electrode) without providing a dedicated antenna. A wireless IC device is provided, in which a loop electrode is provided in a ground electrode provided on a printed wiring circuit board, and in which a wireless IC chip that processes a transmission/reception signal or an electromagnetic coupling module is coupled to the loop electrode. The ground electrode is coupled to the wireless IC chip or the electromagnetic coupling module via the loop electrode, and transmits or receives a high-frequency signal. The ground electrode is formed with a slit for adjusting a resonant frequency thereof.
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Citations
22 Claims
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1. A wireless IC device comprising:
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a wireless IC chip that includes input/output terminal electrodes and processes a transmission/reception signal; a printed wiring circuit board on which the wireless IC chip is mounted; a ground electrode provided on the printed wiring circuit board; and a loop electrode including first and second ends and provided on the printed wiring circuit board so as to be coupled to the wireless IC chip and the ground electrode, wherein the loop electrode is coupled to the input/output terminal electrodes of the wireless IC chip at the first and second ends and is coupled to the ground electrode; and the ground electrode includes a slit and/or a cutout arranged to adjust a resonant frequency thereof. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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2. A wireless IC device comprising:
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an electromagnetic coupling module including input/output terminal electrodes, a wireless IC that processes a transmission/reception signal and a power supply circuit board that includes an inductance element coupled to the wireless IC; a printed wiring circuit board on which the electromagnetic coupling module is mounted; a ground electrode provided on the printed wiring circuit board; and a loop electrode including first and second ends and provided on the printed wiring circuit board so as to be coupled to the power supply circuit board and the ground electrode, wherein the loop electrode is coupled to the input/output terminal electrodes of the electromagnetic coupling module at the first and second ends and is coupled to the ground electrode; and the ground electrode includes a slit and/or a cutout arranged to adjust a resonant frequency thereof.
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20. A method for adjusting a resonant frequency of a wireless IC device that includes:
- a wireless IC chip that includes input/output terminal electrodes and processes a transmission/reception signal;
a printed wiring circuit board on which the wireless IC chip is mounted;
a ground electrode provided on the printed wiring circuit board; and
a loop electrode including first and second ends and provided on the printed wiring circuit board so as to be coupled to the wireless IC chip and the ground electrode, wherein the loop electrode is coupled to the input/output terminal electrodes of the wireless IC chip at the first and second ends and is coupled to the ground electrode, the method comprising the step of;adjusting the resonant frequency by forming a slit and/or a cutout in the ground electrode. - View Dependent Claims (22)
- a wireless IC chip that includes input/output terminal electrodes and processes a transmission/reception signal;
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21. A method for adjusting a resonant frequency of a wireless IC device that includes:
- an electromagnetic coupling module including input/output terminal electrodes, a wireless IC that processes a transmission/reception signal and a power supply circuit board that includes an inductance element coupled to the wireless IC;
a printed wiring circuit board on which the electromagnetic coupling module is mounted;
a ground electrode provided on the printed wiring circuit board; and
a loop electrode including first and second ends and provided on the printed wiring circuit board so as to be coupled to the power supply circuit board and the ground electrode, wherein the loop electrode is coupled to the input/output terminal electrodes of the electromagnetic coupling module at the first and second ends and is coupled to the ground electrode, the method comprising the step of;adjusting the resonant frequency by forming a slit and/or a cutout in the ground electrode.
- an electromagnetic coupling module including input/output terminal electrodes, a wireless IC that processes a transmission/reception signal and a power supply circuit board that includes an inductance element coupled to the wireless IC;
Specification