Abstract: In an antenna, the outer conductor is formed of a first linear conductor, the first linear conductor having a length corresponding to one wavelength of a right-handed circularly polarized wave and circularly extended from a first feed point to a second feed point. The inner conductor is disposed inside the outer conductor and formed of a second linear conductor, the second linear conductor being different from the first linear conductor and having a length determined based on one wavelength of a left-handed circularly polarized wave. The inner conductor has a starting point of the second linear conductor connected to the first feed point and has an end point of the second linear conductor kept free from connection at a location inside the outer conductor, and causes current to flow in a direction opposite to the current flow in the outer conductor.

Abstract: In an antenna, the outer conductor is formed of a first linear conductor, the first linear conductor having a length corresponding to one wavelength of a right-handed circularly polarized wave and circularly extended from a first feed point to a second feed point. The inner conductor is disposed inside the outer conductor and formed of a second linear conductor, the second linear conductor being different from the first linear conductor and having a length determined based on one wavelength of a left-handed circularly polarized wave. The inner conductor has a starting point of the second linear conductor connected to the first feed point and has an end point of the second linear conductor kept free from connection at a location inside the outer conductor, and causes current to flow in a direction opposite to the current flow in the outer conductor.

Abstract: An electric transmission communication unit and an electric reception communication unit are arranged on a base material, and include a flat plate-like first electrode that transmits electric power in a non-contact manner, a flat plate-like second electrode that is arranged side by side with the first electrode on the base material and transmits electric power in a non-contact manner, and a slot antenna that transmits or receives radio waves via a slit formed on the first electrode. For a power transmitting communication device, the first electrode and the second electrode of the electric transmission communication unit are arranged being opposed to the first electrode and the second electrode of the electric reception communication unit so that power transmission can be performed, and the slot antenna of the electric transmission communication unit is arranged being opposed to the slot antenna of the electric reception communication unit in a communicable manner.

Abstract: A coupling electrode of a communication coupler intersects with an orthogonal plane that is orthogonal to a coil axial line direction of a power transmission coil. That is, the coupling electrode of the communication coupler is not in parallel with the orthogonal plane orthogonal to the coil axial line direction of the power transmission coil. For example, the coupling electrode of the communication coupler is perpendicular to the orthogonal plane being orthogonal to the coil axial line direction, and includes the coil axial line direction in a plane of the coupling electrode.

Abstract: A coupling electrode of a communication coupler is installed at an opening of a substrate and is, viewed from an orthogonal direction orthogonal to a coil axial direction of a power transmission coil, positioned to the substrate side in the coil axial direction than a coil end portion of the power transmission coil opposite side to the substrate. For example, an end portion of the coupling electrode on a communication side in the coil axial direction positions, viewed from the orthogonal direction, at the same position as a surface of the substrate opposite to the power transmission coil, in the coil axial direction.

Abstract: A coupling electrode of a communication coupler is installed at an opening of a substrate and is, viewed from an orthogonal direction orthogonal to a coil axial direction of a power transmission coil, positioned to the substrate side in the coil axial direction than a coil end portion of the power transmission coil opposite side to the substrate. For example, an end portion of the coupling electrode on a communication side in the coil axial direction positions, viewed from the orthogonal direction, at the same position as a surface of the substrate opposite to the power transmission coil, in the coil axial direction.

Abstract: An electric transmission communication unit and an electric reception communication unit are arranged on a base material, and include a flat plate-like first electrode that transmits electric power in a non-contact manner, a flat plate-like second electrode that is arranged side by side with the first electrode on the base material and transmits electric power in a non-contact manner, and a slot antenna that transmits or receives radio waves via a slit formed on the first electrode. For a power transmitting communication device, the first electrode and the second electrode of the electric transmission communication unit are arranged being opposed to the first electrode and the second electrode of the electric reception communication unit so that power transmission can be performed, and the slot antenna of the electric transmission communication unit is arranged being opposed to the slot antenna of the electric reception communication unit in a communicable manner.

Abstract: A coupling electrode of a communication coupler intersects with an orthogonal plane that is orthogonal to a coil axial line direction of a power transmission coil. That is, the coupling electrode of the communication coupler is not in parallel with the orthogonal plane orthogonal to the coil axial line direction of the power transmission coil. For example, the coupling electrode of the communication coupler is perpendicular to the orthogonal plane being orthogonal to the coil axial line direction, and includes the coil axial line direction in a plane of the coupling electrode.