Provided is a leaky wave antenna comprising a power supply line receiving power from the outside and a metal plate receiving a signal for forming a beam from the power supply line, in which etching patterns for forming a dual-beam are symmetrically formed on one side of the metal plate and the other side of the metal plate facing the one side and a plurality of vias are disposed between the one side and the other side.

Provided is a leaky wave antenna comprising a power supply line receiving power from the outside and a metal plate receiving a signal for forming a beam from the power supply line, in which etching patterns for forming a dual-beam are symmetrically formed on one side of the metal plate and the other side of the metal plate facing the one side and a plurality of vias are disposed between the one side and the other side.

System and method for improving the shaving experience by providing improved visibility of the skin shaving area. A digital camera is integrated with the electric shaver for close image capturing of shaving area, and displaying it on a display unit. The display unit can be integral part of the electric shaver casing, or housed in a separated device which receives the image via a communication channel. The communication channel can be wireless (using radio, audio or light) or wired, such as dedicated cabling or using powerline communication. A light source is used to better illuminate the shaving area. Video compression and digital image processing techniques are used for providing for improved shaving results. The wired communication medium can simultaneously be used also for carrying power from the electric shaver assembly to the display unit, or from the display unit to the electric shaver.

A mobile device includes; a power line communication ( ) module that communicates data with an external device via a power line, receives a first preamble signal from the external device during a first preamble interval, receives a voltage signal as the data during a data reception interval following the first preamble interval, and demodulates the voltage signal to provide a demodulated voltage signal, a frequency/duty detector that detects a frequency and a duty of the first preamble signal, and a control circuit that performs signal a data determination operation on a demodulated voltage signal during a data period and using the first detected frequency and the first detected duty.

A mobile device includes; a power line communication ( ) module that communicates data with an external device via a power line, receives a first preamble signal from the external device during a first preamble interval, receives a voltage signal as the data during a data reception interval following the first preamble interval, and demodulates the voltage signal to provide a demodulated voltage signal, a frequency/duty detector that detects a frequency and a duty of the first preamble signal, and a control circuit that performs signal a data determination operation on a demodulated voltage signal during a data period and using the first detected frequency and the first detected duty.

A time synchronization method, applied to a power-line communication (PLC) network that includes a head end node and at least one tail end node coupled to the head end node. The method includes the head end node generates data about voltage zero-crossing points based on reference time, where the data about the voltage zero-crossing points includes zero-crossing time points of the voltage zero-crossing points. When a first timing point arrives, the head end node sends first information to the tail end node, where the first information includes a timestamp of a first zero-crossing point, the first zero-crossing point is a voltage zero-crossing point closest to the first timing point, and the timestamp of the first zero-crossing point is used by the tail end node to determine a zero-crossing time point of a second zero-crossing point.

A system of a machine includes a network of a plurality of nodes distributed throughout the machine, a controller, and a power extraction system within at least one of the nodes. Each of the nodes is operable to communicate through one or more radio frequencies. The controller is configured to communicate with the network of nodes by transmitting the one or more radio frequencies through one or more waveguides. The power extraction system is configured to extract power from the one or more radio frequencies as a first power source, extract power from a second power source, and provide power to one or more components of the system based on power extracted from either or both of the first power source and the second power source.

A method for monitoring a line for a change in ambient conditions. The line includes a measurement line of a predetermined length which has a measuring conductor enclosed in an insulation with a known dielectric coefficient. An analog signal of defined frequency is generated and injected at a feed site. The signal is reflected at a predetermined reflection site and a resulting signal amplitude is measured at a defined measuring point. A measure for the ambient condition, particularly a temperature, is determined from the signal amplitude.

A configuration apparatus includes a processor and a memory. The processor is configured to obtain first data of a first device, the first data indicating that the first device is ready for network configuration. The memory is configured to store network configuration data of a second device. The processor is further configured to: obtain the network configuration data of the second device, and send the network configuration data to the first device, the network configuration data being used to configure the first device to be in a same network connection state as the second device. A power path exists between the first device and the second device, and at least one of the first data or the network configuration data is transmitted through the power path.

A transmitter includes a modulator configured to digitally generate a communication signal whose modulation represents coded information to be transmitted to a local management unit. The transmitter can include a control unit configured to generate harmonic frequencies that are in-phase, inverted, or out-of-phase from a raw signal using fundamental frequencies for modulation.