PORTABLE ELECTRONIC DEVICE
First Claim
Patent Images
1. A portable electronic device comprising:
- a circuit board; and
an antenna coil provided on the circuit board, the antenna coil including;
a first magnetic core and a second magnetic core;
a first coil portion wound around the first magnetic core; and
a second coil portion wound around the second magnetic core,wherein a winding direction of the first coil portion differs from a winding direction of the second coil portion,wherein the first magnetic core and the second magnetic core are juxtaposed relative to each other such that an axis of the first coil portion and an axis of the second coil portion correspond to each other and so that a gap is provided between the first magnetic core and the second magnetic core, andwherein a length X of the antenna coil in an axial direction and a distance Y between two intersecting points at which a virtual line formed by projecting a central line of the antenna coil in the axial direction onto the circuit board intersects an outer periphery of the circuit board, satisfies Y≧
X≧
0.8Y.
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Accused Products
Abstract
A portable electronic device includes a circuit board and an antenna coil installed on the circuit board. The antenna coil includes a magnetic core and a coil wound at either side of an unwound portion. The winding direction of the coil is changed at either side of the unwound portion. When the length of the magnetic core is defined as X and the distance between two intersecting points at which a virtual line formed by projecting the central line of the magnetic core onto the circuit board intersects the outer periphery of the circuit board is defined as Y, the antenna coil satisfies Y≧X≧0.8Y.
27 Citations
8 Claims
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1. A portable electronic device comprising:
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a circuit board; and an antenna coil provided on the circuit board, the antenna coil including; a first magnetic core and a second magnetic core; a first coil portion wound around the first magnetic core; and a second coil portion wound around the second magnetic core, wherein a winding direction of the first coil portion differs from a winding direction of the second coil portion, wherein the first magnetic core and the second magnetic core are juxtaposed relative to each other such that an axis of the first coil portion and an axis of the second coil portion correspond to each other and so that a gap is provided between the first magnetic core and the second magnetic core, and wherein a length X of the antenna coil in an axial direction and a distance Y between two intersecting points at which a virtual line formed by projecting a central line of the antenna coil in the axial direction onto the circuit board intersects an outer periphery of the circuit board, satisfies Y≧
X≧
0.8Y. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A portable electronic device comprising:
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a circuit board; and an antenna coil provided over the circuit board, the antenna coil including; a first magnetic core and a second magnetic core; a first coil portion wound around the first magnetic core; and a second coil portion wound around the second magnetic core, wherein a winding direction of the first coil portion differs from a winding direction of the second coil portion, wherein the first magnetic core and the second magnetic core are juxtaposed relative to each other such that an axis of the first coil portion and an axis of the second coil portion correspond to each other and so that a gap is provided between the first magnetic core and the second magnetic core, wherein a length X of the antenna coil in an axial direction and a distance Y between two intersecting points at which a virtual line formed by projecting a central line of the antenna coil in the axial direction onto the circuit board intersects an outer periphery of the circuit board, satisfies Y≧
X≧
0.8Y, andwherein the antenna coil is separated from the circuit board by a distance.
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Specification