Electric Field Coupler, Communication Apparatus, Communication System, and Fabrication Method for Electric Field Coupler
First Claim
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1. An electric field coupler comprising:
- a strip-like coil formed by bending a strip-like conductor which snakes along a plane perpendicular to a coupling direction in which electric field coupling occurs, such that coil axes are perpendicular to the coupling direction, the strip-like coil having an electrical length of one-half wavelength of a predetermined frequency of a radio-frequency signal and having a form in which the coil axes surround a central portion along the plane,wherein the strip-like coil produces coupling by a longitudinal wave electric field which vibrates in the coupling direction at the central portion.
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Abstract
An electric field coupler includes a strip-like coil formed by bending a strip-like conductor which snakes along a plane perpendicular to a coupling direction in which electric field coupling occurs, such that coil axes are perpendicular to the coupling direction, the strip-like coil having an electrical length of one-half wavelength of a predetermined frequency of a radio-frequency signal and having a form in which the coil axes surround a central portion along the plane. The strip-like coil produces coupling by a longitudinal wave electric field which vibrates in the coupling direction at the central portion.
11 Citations
10 Claims
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1. An electric field coupler comprising:
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a strip-like coil formed by bending a strip-like conductor which snakes along a plane perpendicular to a coupling direction in which electric field coupling occurs, such that coil axes are perpendicular to the coupling direction, the strip-like coil having an electrical length of one-half wavelength of a predetermined frequency of a radio-frequency signal and having a form in which the coil axes surround a central portion along the plane, wherein the strip-like coil produces coupling by a longitudinal wave electric field which vibrates in the coupling direction at the central portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communication apparatus comprising:
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a strip-like coil formed by bending a strip-like conductor which snakes along a plane perpendicular to a coupling direction in which electric field coupling occurs, such that coil axes are perpendicular to the coupling direction, the strip-like coil having an effective length of one-half wavelength of a predetermined frequency of a radio-frequency signal and having a form in which the coil axes surround a central portion along the plane, wherein the strip-like coil performs contactless communication by producing coupling by a longitudinal wave electric field which vibrates in the coupling direction at the central portion.
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9. A communication system comprising:
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two communication apparatuses that perform contactless communication by producing electric field coupling, wherein at least one of the two communication apparatuses has a strip-like coil formed by bending a strip-like conductor which snakes along a plane perpendicular to a coupling direction in which the electric field coupling occurs, such that coil axes are perpendicular to the coupling direction, the strip-like coil having an electrical length of one-half wavelength of a predetermined frequency of a radio-frequency signal and having a form in which the coil axes surround a central portion along the plane, and the strip-like coil performs contactless communication by producing coupling by a longitudinal wave electric field which vibrates in the coupling direction at the central portion.
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10. A fabrication method for an electric field coupler, the method comprising the steps of:
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stamping a piece of sheet metal into a snaking strip-like form to form a snaking strip-like conductor, the sheet metal being perpendicular to a coupling direction in which electric field coupling occurs at a predetermined frequency; and bending the snaking strip-like conductor such that coil axes are perpendicular to the coupling direction, to form a strip-like coil having an electrical length of one-half wavelength of the predetermined frequency and having a form in which the coil axes surround a central portion.
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Specification