Abstract: A detection device, including: one or a plurality of magnetic coupling elements configured to have one or a plurality of coils; and a detection unit that measures or calculates an effective resistance values of the magnetic coupling elements or an effective resistance value of a circuit including at least the magnetic coupling elements and determines a presence or absence of a foreign substance based on a change in the effective resistance value.

Abstract: There are provided a detector and the like that are capable of conveniently detecting conductor or a circuit including a coil. The detector includes a detecting section that determines a Q value or a degree of variation thereof in a circuit including a coil capable of electromagnetic coupling with an external object and that performs detection concerning a state of the electromagnetic coupling with the external object based on a determined result.

Abstract: A cable includes a cable part including at least one set of signal cables for differential transmission, a ground cable, and a power cable, and a first connector and a second connector arranged at both ends of the cable part. At least one of the first connector and the second connector has a common-mode choke coil connected to the ground cable and the power cable.

Abstract: There is provided a detecting apparatus including one or a plurality of magnetic coupling elements that include a plurality of coils, and a detector that measures an electrical parameter related to the one or plurality of magnetic coupling elements or to a circuit that at least includes the one or plurality of magnetic coupling elements, and determines from a change in the electrical parameter whether a foreign matter that generates heat due to magnetic flux is present. In the one or plurality of magnetic coupling elements, the plurality of coils are electrically connected such that magnetic flux produced from at least one or more of the plurality of coils and magnetic flux produced from remaining coils of the plurality of coils have approximately opposing orientations.

Abstract: There is provided a detecting apparatus including one or a plurality of magnetic coupling elements that include a plurality of coils, and a detector that measures an electrical parameter related to the one or plurality of magnetic coupling elements or to a circuit that at least includes the one or plurality of magnetic coupling elements, and determines from a change in the electrical parameter whether a foreign matter that generates heat due to magnetic flux is present. In the one or plurality of magnetic coupling elements, the plurality of coils are electrically connected such that magnetic flux produced from at least one or more of the plurality of coils and magnetic flux produced from remaining coils of the plurality of coils have approximately opposing orientations.

Abstract: Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed.

Abstract: There are provided a detector and the like that are capable of conveniently detecting conductor or a circuit including a coil. The detector includes a detecting section that determines a Q value or a degree of variation thereof in a circuit including a coil capable of electromagnetic coupling with an external object and that performs detection concerning a state of the electromagnetic coupling with the external object based on a determined result.

Abstract: Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed.

Abstract: Provided is a cable including: at least two signal cables formed of first and second signal cables for differential transmission; a third cable for ground; a fourth cable for power supply; a metal sheet adapted to cover the first and second signal cables; a coating material adapted to house the first and second signal cables covered with the metal sheet, and the third and fourth cables; and a magnetic powder-mixed resin filled into an inner space of the coating material and prepared by mixing magnetic powder with a resin.

Abstract: An electromagnetically-coupled state detection circuit including a detection unit that measures a primary side Q value of a circuit containing a primary side coil electromagnetically coupled with a secondary side coil and power transmission efficiency to the secondary side coil, corrects the power transmission efficiency based on the Q value of the primary side coil, and detects a state of electromagnetic coupling with the secondary side coil based on an obtained corrected value of the power transmission efficiency.

Abstract: A power receiving circuit, a power transmitting circuit, an apparatus, and a feed system are disclosed. The power receiving circuit receives power in a noncontact manner, and comprises an LC parallel resonant circuit and a reactance element that is electrically connected in series to the LC parallel resonant circuit. The reactive element may be a capacitive or inductive element. In effect, a coil or capacitor in the LC parallel resonant circuit and the reactance element define another LC resonant circuit, namely, an LC series resonant circuit. The power transmitting circuit transmits power in a noncontact manner, and in one example, may also include a similar configuration.

Abstract: A detection device, including: one or a plurality of magnetic coupling elements configured to have one or a plurality of coils; and a detection unit that measures or calculates an effective resistance values of the magnetic coupling elements or an effective resistance value of a circuit including at least the magnetic coupling elements and determines a presence or absence of a foreign substance based on a change in the effective resistance value.

Abstract: An electromagnetically-coupled state detection circuit including a detection unit that measures a primary side Q value of a circuit containing a primary side coil electromagnetically coupled with a secondary side coil and power transmission efficiency to the secondary side coil, corrects the power transmission efficiency based on the Q value of the primary side coil, and detects a state of electromagnetic coupling with the secondary side coil based on an obtained corrected value of the power transmission efficiency.

Abstract: There is provided a folding antenna device including a first case to which a first antenna is attached, a second case to which a second antenna is attached, and a hinge section configured to openably and closably support the first case and the second case.

Abstract: A power receiving circuit, a power transmitting circuit, an apparatus, and a feed system are disclosed. The power receiving circuit receives power in a noncontact manner, and includes an LC parallel resonant circuit and a reactance element that is electrically connected in series to the LC parallel resonant circuit. The reactive element may be a capacitive or inductive element. In effect, a coil or capacitor in the LC parallel resonant circuit and the reactance element define another LC resonant circuit, namely, an LC series resonant circuit. The power transmitting circuit transmits power in a noncontact manner, and in one example, may also include a similar configuration.

Abstract: Provided is an antenna device including an antenna element configured to receive a broadcast wave and a signal that is superimposed on the broadcast wave and then is transmitted, a ground element having a predetermined length, the ground element being configured to be capable of adjusting a relative position with respect to the antenna element, and a feeding part to which the antenna element and the ground element are connected and from which the signal received by the antenna element is taken out.

Abstract: An antenna includes: a connection device for connection with an electronic device; a cable connected to the connection device; and a high-frequency cutoff unit that is formed of a material having high impedance in a high frequency and disposed at a given position of the cable. The cable with a length defined by the high-frequency cutoff unit functions as an antenna.

Abstract: There is provided an antenna including an antenna element that has a prescribed length and detects a line of electric force, a transmission line that transmits an electrical signal, and a radio wave absorbing and attenuating part that has characteristics to absorb and attenuate a radio wave of a frequency band received by the antenna element and is arranged at least between the antenna element and the transmission line.

Abstract: Provided is a cable including: at least two signal cables formed of first and second signal cables for differential transmission; a third cable for ground; a fourth cable for power supply; a metal sheet adapted to cover the first and second signal cables; a coating material adapted to house the first and second signal cables covered with the metal sheet, and the third and fourth cables; and a magnetic powder-mixed resin filled into an inner space of the coating material and prepared by mixing magnetic powder with a resin.

Abstract: A connection device includes a rod-shaped electrode, a plurality of cylindrical electrodes through which the rod-shaped electrode passes, the plurality of cylindrical electrodes being sequentially exposed on a surface in order from a front end side of the rod-shaped electrode, an insulation section configured to insulate the rod-shaped electrode and the plurality of cylindrical electrodes from each other, and a plurality of connection terminals electrically connected to the rod-shaped electrode and the plurality of cylindrical electrodes in a vicinity of a rear end of the rod-shaped electrode, the plurality of connection terminals being protruded from a rear side.