Radio tag antenna structure for an optical recording medium and a case for an optical recording medium with a radio tag antenna
First Claim
1. A radio tag antenna structure for an optical recording medium having an antenna structure comprising an antenna pattern on one surface of a dielectric member and a ground pattern on the other surface of said dielectric member, and attached to said optical recording medium having a dielectric layer and a metal layer on the side from which a laser beam does not come in, said radio tag antenna structure further comprising:
- a communication circuit chip which is to be connected to said antenna pattern being formed on a surface of said dielectric layer of said optical recording medium so that a ground terminal of said communication circuit chip is connected to said metal layer of said optical recording medium through a through hole formed in said dielectric layer of said optical recording medium,wherein said antenna pattern is formed on a surface of or inside said dielectric layer of said optical recording medium so that said metal layer (12) of said optical recording medium is used as said ground pattern in said antenna structure.
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Accused Products
Abstract
An antenna comprises a dielectric member, an antenna pattern formed on one surface of the dielectric member, and a ground pattern formed on the other surface of the dielectric member. A part or the whole of the antenna is implanted in a dielectric layer on the side from which a laser beam does not come in of an optical recording medium symmetrically having a metal layer reflecting the laser beam and the dielectric layer, thereby to provide a radio tag antenna structure for an optical recording medium which is simple, is small-sized, and can secure necessary reading performance.
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Citations
18 Claims
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1. A radio tag antenna structure for an optical recording medium having an antenna structure comprising an antenna pattern on one surface of a dielectric member and a ground pattern on the other surface of said dielectric member, and attached to said optical recording medium having a dielectric layer and a metal layer on the side from which a laser beam does not come in, said radio tag antenna structure further comprising:
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a communication circuit chip which is to be connected to said antenna pattern being formed on a surface of said dielectric layer of said optical recording medium so that a ground terminal of said communication circuit chip is connected to said metal layer of said optical recording medium through a through hole formed in said dielectric layer of said optical recording medium, wherein said antenna pattern is formed on a surface of or inside said dielectric layer of said optical recording medium so that said metal layer (12) of said optical recording medium is used as said ground pattern in said antenna structure.
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2. A radio tag antenna structure for an optical recording medium having an antenna structure comprising an antenna pattern on one surface of a dielectric member and a ground pattern on the other surface of said dielectric member, and attached to said optical recording medium having a dielectric layer and a metal layer on the side from which a laser beam does not come in, said radio tag antenna structure further comprising:
a communication circuit chip which is to be connected to said antenna pattern being implanted in said dielectric layer of said optical recording medium so that a ground terminal of said communication circuit chip is connected to said metal layer of said optical recording medium.
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3. A radio tag antenna structure for an optical recording medium which is an antenna structure for a radio tag attached to an optical recording disk medium having a dielectric layer and a metal layer,
wherein a pan or the whole of an antenna is implanted in a portion of said dielectric layer on which said metal layer is not fanned in said optical recording disk medium, wherein said optical recording disk medium symmetrically has said dielectric layer and said metal layer about an adhesive layer, and said antenna is implanted in said adhesive layer on which said metal layer is not formed in said optical recording disk medium, wherein said antenna is implanted in said adhesive layer at an inner peripheral portion of said optical recording disk medium, and wherein said antenna is configured as a curved antenna having a curved shape along an inner periphery of said optical recording disk medium, said radio tag antenna structure further comprising: a communication circuit chip which is to be connected to said curved antenna being disposed at an inner peripheral portion of said optical recording disk medium so that a ground of said communication circuit chip is connected to said metal layer of said optical recording disk medium. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A radio tag antenna structure for an optical recording medium, which is an antenna structure for a radio tag attached to an optical recording disk medium having a dielectric layer and a metal layer,
wherein a part or the whole of an antenna is implanted in a portion of said dielectric layer on which said metal layer is not formed in said optical recording disk medium, wherein said antenna is disposed on said dielectric layer at an inner peripheral portion of said optical recording disk medium, and wherein said antenna is configured as a curved antenna having a curved shape along an inner periphery of said optical recording disk medium, said radio tag antenna structure further comprising: a communication circuit chip which is to be connected to said curved antenna being disposed at an inner peripheral portion of said optical recording disk medium so that a ground of said communication circuit chip is connected to said metal layer of said optical recording disk medium. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A radio tag antenna structure far an optical recording medium, which is an antenna structure for a radio tag attached to an optical recording disk medium having a dielectric layer and a metal layer,
wherein a part or the whole of an antenna is implanted in a portion of said dielectric layer on which said metal layer is not formed in said optical recording disk medium, and wherein said antenna comprises: -
an antenna metallic portion; and an antenna dielectric portion formed on one or both surfaces of said antenna metallic portion, and having a relative dielectric constant greater than a relative dielectric constant of said dielectric layer of said optical recording disk medium.
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Specification