ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS
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Abstract
A multiband-capable antenna device includes a loop-shaped radiation element including a power feed end and a ground end, and a matching circuit including a first inductance element loaded at the power feed end and a second inductance element loaded at the ground end and magnetic-field coupled to the first inductance element. The loop-shaped radiation element is configured to resonate in a plurality of resonance modes including an even mode and an odd mode. The first inductance element and the second inductance element are wound and connected such that magnetic fields are mutually strengthened for one of the even mode and the odd mode, and such that the magnetic fields are mutually weakened for the other of the even mode and the odd mode.
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Citations
21 Claims
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1. (canceled)
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2. An antenna device comprising:
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a radiation element including a first conductor including a power feed end and a second conductor including a ground end; and a matching circuit including a first inductance element loaded at the power feed end of the first conductor, and a second inductance element loaded at the ground end of the second conductor and magnetic-field coupled to the first inductance element;
whereinthe radiation element is configured to resonate in a plurality of resonance modes including an even mode and an odd mode; and the first inductance element and the second inductance element are wound and connected such that magnetic fields are mutually strengthened for one of the even mode and the odd mode, and such that the magnetic fields are mutually weakened for the other of the even mode and the odd mode. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication apparatus comprising:
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a power feed element; a radiation element including a first conductor including a power feed end and a second conductor including a ground end; and a matching circuit including a first inductance element loaded at the power feed end of the first conductor, and a second inductance element loaded at the ground end of the second conductor and magnetic-field coupled to the first inductance element;
whereinthe radiation element is configured to resonate in a plurality of resonance modes including an even mode and an odd mode; and the first inductance element and the second inductance element are wound and connected such that magnetic fields are mutually strengthened for one of the even mode and the odd mode, and that the magnetic fields are mutually weakened for the other of the even mode and the odd mode. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification