10531results about "Coupling devices" patented technology

A low attenuation surface wave transmission line system for launching surface waves on a bare and unconditioned conductor, such as are found in abundance in the power transmission lines of the existing power grids. The conductors within the power grid typically lack dielectric and special conditioning. Accordingly, the present invention includes a first launcher, preferably including a mode converter and an adapter, for receiving an incident wave of electromagnetic energy and propagating a surface wave longitudinally on the power lines. The system includes at least one other launcher, and more likely a number of other launchers, spaced apart from one another along the constellation of transmission lines. The system and associated electric fields along any given conductor are radially and longitudinally symmetrical.

The RF signal generated by a ZigBee radio on the outside of a building structure is conveyed to the interior of the building by guiding it along an electric cable bundle that passes through the building's wall to supply domestic electric power to the interior of the structure. The RF signal is launched by a unique coupler comprising a pair of insulated foil conductors.

An interconnect apparatus for providing a communication path for data signals in a predetermined frequency band, that includes a first and a second sections of a transmission line, connected at one end to first and second data transceiving devices, respectively. A switch, such as a mechanical, electro-mechanical, electronic, electro-magnetic and electro-optical switch, having conductive / non-conductive states, is provided for connecting / disconnecting between the other ends of the first and the second sections, for providing a data communication path between the data transceiving devices while being in its conductive state a third and a fourth sections of a transmission line, each of which connected at one end to a contact of the switch and at the other end to a first and a second connector, respectively. A compensation circuitry is provided for compensating, within the frequency band, parasitic effects caused by the switch and / or cord, while the switch is in its conductive state or, while the switch is in its non-conductive state and while a connection between the first and the second connectors is provided by a cord having predetermined characteristics, such that the compensation circuitry compensates the influence of parasitic effects introduced along the communication path by the switch while being in its non-conductive state and while the cord is a part of the communication path or, by the combination of the third and a fourth sections and the connectors while the switch is in its conductive state.

The present invention provides a power line communications system that may employ power lines and non-power communications mediums. In one embodiment, the system is comprised of a plurality of interface devices with each being in communication with one or more user devices via one or more low voltage power lines. Each interface device also may be in communication with an upstream communications device via a non-power line communications medium. The upstream communications device may communicate with a backhaul point via a backhaul link to provide access to a network such as the Internet. In one embodiment, each interface device provides an interface between one or more low voltage power lines and the non-power line communications medium, which may be a coaxial cable. The upstream communications device may provide routing for data communicated with the interface devices.

The invention provides a method and a device for communicating a signal over a power line. One embodiment may comprise a length of power cable that comprises a center conductor substantially surrounded by an insulator. A concentric conductor is disposed external to the insulator over a first portion of the cable. A coupling conductor may be disposed concentrically around a second portion of the cable external to said insulator and having a first end and a second end. The concentric conductor is absent in a manner to form a gap between the concentric conductor and the first end of said coupling conductor. A transceiver cable is coupled to the first end of said coupling conductor and a common mode choke may be disposed substantially around the entire circumference of a portion of said coupling conductor. Finally, the second end of the coupling conductor may be coupled to ground through a convenient neutral conductor.

A mechanism for coupling a coaxial waveguide to another waveguide. The mechanism includes a lower or matching waveguide and an impedance transformer. A coaxial port couples the coaxial waveguide to the matching waveguide. The matching waveguide has a waveguide impedance which is close to the impedance of the coaxial waveguide. This arrangement allows matching between the coaxial waveguide and the matching waveguide over a wider frequency band. The impedance transformer couples the matching waveguide to the other waveguide. The impedance transformer comprises a single-stage, double-stage, or multi-stage transformer. The mechanism is suitable for coupling an antenna to a coaxial cable interface in a radar or microwave based level measurement or time of flight ranging systems.

The invention relates to a method and a device for transmission without crosstalk in interconnections used for sending a plurality of signals, such as the interconnections made with flat multiconductor cables, or with the tracks of a printed circuit board, or inside an integrated circuit. An interconnection with four parallel transmission conductors plus a reference conductor has each of its ends connected to a termination circuit. The transmitting circuit receives at its input the signals of the four channels of the source and its output terminals are connected to the conductors of the interconnection. The receiving circuit(s) input terminals are connected to the conductors of the interconnection, and its four output channels are connected to the destination. The signals of the four channels of an active source are sent to the four channels of the destination, without noticeable crosstalk.