Abstract: In order to further improve the communication quality, the electronic device (10) according to this disclosure includes a transmitting antenna (11), a receiving antenna (12) and a controller (14) configured to shift a receiving frequency band of the receiving antenna (12) to separate from a transmitting frequency band of the transmitting antenna (11).

Abstract: An electronic device is to be worn by a user and includes an antenna and a storage compartment that stores the antenna. In a state of the electronic device being worn by the user, the storage compartment is positioned at a side of the user's head. The antenna is capable of selectively adopting a stored state and a deployed state, the antenna being stored in the storage compartment in the stored state, and a greater portion of the antenna being separated from the storage compartment in the deployed state than in the stored state.

Abstract: An electronic device is to be worn by a user and includes an antenna and a storage compartment that stores the antenna. In a state of the electronic device being worn by the user, the storage compartment is positioned at a side of the user's head. The antenna is capable of selectively adopting a stored state and a deployed state, the antenna being stored in the storage compartment in the stored state, and a greater portion of the antenna being separated from the storage compartment in the deployed state than in the stored state.

Abstract: Provided is an electronic device in which, if an antenna element is formed on the surface of a housing, restrictions on the formation of the antenna element are less likely to arise. The following are provided: a rear case, an antenna element, and a power supply unit that supplies power to the antenna element. The antenna unit comprises a first section that is formed by applying a conductive material onto a first main surface of the rear case, and a second section. A dielectric or an insulator is interposed between the first section and the second section.

Abstract: Provided is an electronic device in which, if an antenna element is formed on the surface of a housing, restrictions on the formation of the antenna element are less likely to arise. The following are provided: a rear case, an antenna element, and a power supply unit that supplies power to the antenna element. The antenna unit comprises a first section that is formed by applying a conductive material onto a first main surface of the rear case, and a second section. A dielectric or an insulator is interposed between the first section and the second section.

Abstract: An electronic device is capable of intra-body communication even when the remaining charge of the battery is less than a predetermined charge. The electronic device is capable of intra-body communication. The electronic device includes a battery and an intra-body communication functional unit that performs intra-body communication. When the electronic device does not activate despite performance of an operation to activate the electronic device, the intra-body communication functional unit performs intra-body communication at a voltage supplied by the battery.

Abstract: Provided is an electronic device in which, if an antenna element is formed on the surface of a housing, restrictions on the formation of the antenna element are less likely to arise. The following are provided: a rear case, an antenna element, and a power supply unit that supplies power to the antenna element. The antenna unit comprises a first section that is formed by applying a conductive material onto a first main surface of the rear case, and a second section. A dielectric or an insulator is interposed between the first section and the second section.

Abstract: A communication repeater comprises a transmitting and receiving that performs wireless communication with a communication device, a power-line carrier communication unit that performs power-line carrier communication with the communication device, and a control unit. The control unit selects either one of the wireless communication and the power-line carrier communication according to conditions.

Abstract: According to an aspect, a power line communication device includes a power line communication unit, a process unit, a waveform acquiring unit, a storage unit, a comparing unit, and a security level setting unit. The power line communication unit performs power line communication based on a communication signal superimposed on a carrier wave transmitted via a power line. The waveform acquiring unit acquires a waveform of the communication signal included in the carrier wave transmitted via the power line of the commercial power source. The comparing unit compares waveform information stored in the storage unit with waveform information acquired by the waveform acquiring unit at the time of requiring the process of the process. The security level setting unit changes the security level based on the comparison result by the comparing unit.

Abstract: A communication repeater comprises a transmitting and receiving that performs wireless communication with a communication device, a power-line carrier communication unit that performs power-line carrier communication with the communication device, and a control unit. The control unit selects either one of the wireless communication and the power-line carrier communication according to conditions.