High-frequency electric field coupler, communication system, and communication apparatus

A communication apparatus comprising:

• a communication circuit unit processing a high-frequency signal for data transmission;
• and
• a high-frequency electric field coupler performing electric field coupling with a party to communicate provided opposite to the same at an ultra short distance,
• wherein:
• the high-frequency electric field coupler includes
• a coupling electrode formed by a coiled linear conductor and a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency;
• and
• the length of the coupling electrode formed by a coiled linear conductor is determined such that there is a phase difference of about 180 degrees between input and output signals which are a high-frequency signal input from one end of the linear conductor and a resultant signal output from another end of the same, respectively.

A high-frequency electric field coupler used in a contactless communication system propagating high frequency signals in a wide band utilizing electric field coupling, comprising:

• a coupling electrode;
• and
• a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency,
• wherein:
• the coupling electrode is formed by a coiled linear conductor;
• and
• the length of the coupling electrode formed by a coiled linear conductor is determined such that there is a phase difference of about 180 degrees between input and output signals which are a high-frequency signal input from one end of the linear conductor and a resultant signal output from another end of the same, respectively.

A high-frequency electric field coupler used in a contactless communication system propagating high frequency signals in a wide band utilizing electric field coupling, comprising:

• a coupling electrode;
• and
• a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency,
• wherein:
• the coupling electrode is formed by a coiled linear conductor;
• and
• the surface of the linear conductor is coated with an insulation layer.

A high-frequency electric field coupler used in a contactless communication system propagating high frequency signals in a wide band utilizing electric field coupling, comprising:

• a coupling electrode;
• and
• a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency,
• wherein:
• the coupling electrode is formed by a coiled linear conductor;
• and
• the linear conductor is wound around a core bar.

A high-frequency electric field coupler used in a contactless communication system propagating high frequency signals in a wide band utilizing electric field coupling, comprising:

• a coupling electrode;
• and
• a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency,
• wherein:
• the coupling electrode is formed by a coiled linear conductor;
• and
• the linear conductor is fixed with a resin after being wound in the form of a coil.

A communication apparatus comprising:

• a communication circuit unit processing a high-frequency signal for data transmission;
• and
• a high-frequency electric field coupler performing electric field coupling with a party to communicate provided opposite to the same at an ultra short distance,
• wherein:
• the high-frequency electric field coupler includes
• a coupling electrode formed by a coiled linear conductor and a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency;
• and
• the surface of the linear conductor is coated with an insulation layer.

A communication apparatus comprising:

• a communication circuit unit processing a high-frequency signal for data transmission;
• and
• a high-frequency electric field coupler performing electric field coupling with a party to communicate provided opposite to the same at an ultra short distance,
• wherein:
• the high-frequency electric field coupler includes
• a coupling electrode formed by a coiled linear conductor and a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency;
• and
• the linear conductor is wound around a core bar.

A communication apparatus comprising:

• a communication circuit unit processing a high-frequency signal for data transmission;
• and
• a high-frequency electric field coupler performing electric field coupling with a party to communicate provided opposite to the same at an ultra short distance,
• wherein:
• the high-frequency electric field coupler includes
• a coupling electrode formed by a coiled linear conductor and a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency;
• and
• the linear conductor is fixed with a resin after being wound in the form of a coil.

A communication apparatus comprising:

• a communication circuit unit processing a high-frequency signal for data transmission;
• and
• a high-frequency electric field coupler performing electric field coupling with a party to communicate provided opposite to the same at an ultra short distance,
• wherein:
• the high-frequency electric field coupler includes
• a coupling electrode formed by a coiled linear conductor and a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency;
• the resonance unit is a short stub having a length equivalent to one half of the used wavelength and having a terminating end shorted to ground;
• and
• the coupling electrode formed by a coiled linear conductor is connected to a position of the short stub substantially at the center thereof and shorted to ground at an end thereof.