140results about "Near-field systems with leaky/radiating cables" patented technology

Herein disclosed an information processing terminal that is allowed to carry out contactless data transmission / reception with a read / write device by use of a magnetic field, the information processing terminal including: a data transmitter / receiver configured to generate an induced voltage from a magnetic field generated from the read / write device at the time of data reception, and sends a transmission signal to the read / write device at the time of data transmission; a signal processor configured to generate a response signal based on the induced voltage; and a load modulator configured to include a load of which value is changed based on the induced voltage and carry out load modulation relating to the transmission signal based on the response signal

Stable receiving action is achieved with a receiver of simpler configuration.When a human hand is held over the panel unit 201, the electric field in the vicinity of the human body is coupled to the sensor electrode 2122 of the coil sensor 212 from the receiving electrode 211 of the panel unit 201, and alternate current is generated at the sensor electrode 2122. This alternate current then induces a magnetic flux inside the central opening of the coil 2121 in proportion to the strength of the electric field in the vicinity of the human body. Depending on the changes in this magnetic flux, electric current passes through the coil 2121. The electric current passing through the coil 2121 is converted by the electric current detecting circuit 2124 of the coil sensor 212 to voltage signals and transmitted as received signals to the demodulator 22. As a result, the received signals corresponding to the electric field in the vicinity of the human body, namely the transmission signals applied by the transmitter 1 to the human body, are obtained.

The invention relates to a directional coupling communication apparatus where the coupling impedance can be easily matched to reduce reflections, and thus, the speed of communication channels is increased as compared to that with inductive coupling, and at the same time, the reliability of communication is improved by increasing the signal intensity. Modules having a coupler where an input / output connection line is connected to a first end, and either a ground line or an input / output connection line to which an inverse signal of a signal to be inputted into the input / output connection line connected to the above-described first end is inputted is connected are layered on top of each other so that the couplers are couplers to each other using capacitive coupling and inductive coupling.

A transmission system in a downhole component comprises a plurality of data transmission elements. A coaxial cable having an inner conductor and an outer conductor is disposed within a passage in the downhole component such that at least one capacitor is disposed in the passage and having a first terminal coupled to the inner conductor and a second terminal coupled to the outer conductor. Preferably the transmission element comprises an electrically conducting coil. Preferably, within the passage a connector is adapted to electrically connect the inner conductor of the coaxial cable and the lead wire. The coaxial capacitor may be disposed between and in electrically communication with the connector and the passage. In another embodiment a connector is adapted to electrical connect a first and a second portion of the inner conductor of the coaxial cable and a coaxial capacitor is in electrical communication with the connector and the passage.

A user terminal device, an audio system, and a method of controlling a speaker are provided. The method includes performing a pairing operation with a plurality of speakers, displaying a multi-channel setting user interface (UI) including identifiers of the plurality of speakers, and in response to a multi-channel setting command for at least two speakers from among the plurality of speakers being input through the multi-channel setting UI, transmitting a multi-channel setting command to the at least two speakers.

A device for transmitting in multiple coupling modes has a transmission module (11), at least one periphery module (18), and an antenna (16, 17) for each of the multiple coupling modes. Further, in a method of switching between multiple coupling modes, switching is conducted between at least polling and listening phases of first and second coupling modes. The device and the method enable a seamless switching between e.g. a near field communication and a body coupled communication. Such a coupling or switching is particularly useful for performing secure transactions whereby through body coupled communication a body-worn tag is interrogated which provides a secure code for a transaction initiated through near field communication with a transaction terminal.

Systems and methods for providing network access to mobile devices that travel with a vehicle, such as a train, a bus, a boat, etc. along or adjacent to a relatively fixed path that may extend over a large geographic area. Mobile devices access the network through stationary access points arranged along or adjacent to the path and communicate with a communication network. The communication network may be arranged as an asynchronous transfer mode (ATM) local area network emulation (LANE) network. One of the mobile devices may be a mobile access point which can couple other mobile devices to the network and record authentication information of other mobile devices so that fast transitions can be made from one stationary access point to another as the vehicle moves along the path.

A device for directing energy to a target volume of tissue includes an inner conductor having a length and an outer conductor coaxially surrounding the inner conductor along the length. The outer conductor has a proximal portion and a distal portion. The distal portion of the outer conductor is provided with a number of apertures N defined therein for radiating energy, where N is an integer greater than 1, each aperture having a size and extending at an angle relative to a longitudinal axis of the outer conductor. At least one of the size and the angle of each aperture is varied in relation to the other apertures N−1 such that the energy radiated along the distal portion is substantially uniform.

The invention relates to a radio-frequency communication device comprising an inductive antenna in order to communicate with a transponder. According to the invention, the antenna is capable of establishing weak coupling with a transmitter which produces a magnetic field which is substantially homogeneous on the scale of the antenna and is also capable of establishing strong inductive coupling with a transponder located in the vicinity of the device, with the device comprising a transponder interrogation circuit comprising means of sampling and processing the signal on the antenna terminals which are capable of producing a reference signal as a function of said signal; modulation means capable of modulating the reference signal; and application means capable of applying the modulated signal to the antenna terminals.

There is provided a radio communication apparatus including a first radio communication unit that performs proximity communication by first radio communication, a second radio communication unit that performs the proximity communication by second radio communication via a magnetic field, a detection unit that detects the magnetic field generated in the second radio communication, and a control unit that controls radio communication by the first radio communication unit based on a detection result detected by the detection unit.

A device for providing a supply voltage and a load modulation in a transponder with a unit having a resistance controllable by a control signal at a control input thereof, a unit for applying a load modulation signal to the control input, and a unit for applying a voltage limitation control signal to the control input.

There is provided a radio communication device that includes a plurality of leaky coaxial cables that transmit and receive radio signals, a detection unit that detects a difference in reception timing of a radio signal transmitted from another radio communication device among the plurality of leaky coaxial cables, and a transmission timing adjustment unit that adjusts transmission timing of radio signals to be respectively transmitted from the plurality of leaky coaxial cables based on the difference in the reception timing detected by the detection unit.

There is provided a radio communication device that includes a plurality of leaky coaxial cables that transmit and receive radio signals, a detection unit that detects a difference in reception timing of a radio signal transmitted from another radio communication device among the plurality of leaky coaxial cables, and a transmission timing adjustment unit that adjusts transmission timing of radio signals to be respectively transmitted from the plurality of leaky coaxial cables based on the difference in the reception timing detected by the detection unit.

The invention relates to a wireless communications system for communicating with user equipment located inside a physical structure. The system comprise a node having at least two antenna ports and being adapted for wireless communication with the user equipment, and at least one leaky cable having two ends wherein each end of the at least one leaky cable is connected to one of the antenna ports of the node. The at least one leaky cable is provided at least partially inside the physical structure and being adapted for wireless communication over a radio channel with the user equipment.

A leaky cable with a central conductor, and an outer conductor having a rectangular cross section surrounding the central conductor. The outer conductor has a first and a second surface parallel to each other, and at least one slot row formed in at least one of the first and second surface. The slot row is formed in a first direction of the outer conductor and includes a plurality of slots each configured to form a leaky electromagnetic field. An insulator is disposed between the central conductor and the outer conductor. The width of the rectangular cross section in a direction parallel to the first and second surfaces is less than half of a wavelength of an electric signal transmitted through the leaky cable.

The present invention provides a high / low frequency dual wireless location detection and information transmission system which is high in reliability and maintainability, and can be easily installed.A leakage coaxial inner conductor and a conductor line provided in parallel are short-circuited at an end, a single leakage coaxial operation and a loop operation of the inner conductor and the conductor line are performed at the same time, the ID of a tag is communicated using magnetic fields which locally exist near the conductor line by the loop, and wireless position detection and information communications which are less affected by the influence of ambient environments due to electromagnetic waves in a closed area are realized by open-type lines.

In order to identify a fault location, a fault detection method in which a base station installed in each of a plurality of sections of a route, an antenna which is connected to the base station and installed along the route, and a control device which controls all the base stations installed along the route are used comprises: measuring a strength of a signal emitted from the antenna in at least one mobile body in operation; acquiring a temporary failure determination result based on the signal strength, transmitting announcement information by the control device via the base station and the antenna to which it is determined that a failure occurs when the temporary failure determination result is acquired, transmitting an answer to the control device by the arbitrary mobile body in operation and receives the announcement information, and making a final failure determination based on the answer transmitted from each mobile body in the control device.

The invention relates to a wireless outdoor-indoor multiple-input multiple-output (MIMO) communications system for communicating with user equipment located inside a physical structure such as a building. The MIMO communication system is comprised of a node having at least two node antennas, wherein the node is configured for line of sight (LOS) wireless MIMO communication with at least two outdoor-indoor repeaters, and of at least two outdoor-indoor repeaters adapted for LOS wireless MIMO communication with the node. The repeaters have at least one repeater antenna each, provided outside the physical structure, for LOS MIMO communication with the node and at least one leaky cable each, provided inside the physical structure, for indoor MIMO communication with the user equipment located inside the physical structure. The repeaters are provided outside on the same physical structure and spaced well-apart, and each leaky cable of each repeater is provided such that they provide the same indoor coverage of the same interior space in the physical structure.

The object of the present invention is to provide a communication system and a communication device that allow large-capacity data communication between information devices applied in the field of communication, wherein the communication system includes: a transmitter with a transmitter for generating a data transmission adaptive RF signal A circuit unit and an electric field coupling antenna for transmitting RF signals with an induction field and / or an electrostatic field; a receiver having an electric field coupling antenna and a receiving circuit unit for receiving and processing an RF signal received through the electric field coupling antenna; and having a receiving circuit unit for receiving and transmitting A plurality of transmitter side electric field coupling antennas for capacitively coupling and outputting RF signals from the electric field coupling antennas, a signal line for transmitting received RF signals, and a capacitor for outputting and receiving side electric field coupling antennas A coupling device that couples and transmits RF signals through a signal line to a plurality of receiving side electric field coupling antennas.

Methods and apparatus are disclosed for wirelessly communicating among integrated circuits and / or functional modules within the integrated circuits. A semiconductor device fabrication operation uses a predetermined sequence of photographic and / or chemical processing steps to form one or more functional modules onto a semiconductor substrate. The functional modules are coupled to an integrated waveguide that is formed onto the semiconductor substrate and / or attached thereto to form an integrated circuit. The functional modules communicate with each other as well as to other integrated circuits using a multiple access transmission scheme via the integrated waveguide. One or more integrated circuits may be coupled to an integrated circuit carrier to form Multichip Module. The Multichip Module may be coupled to a semiconductor package to form a packaged integrated circuit.

A radio frequency communication system utilizing a radiating transmission line for communicating data signals is disclosed. The data signals convey digital data to remotely located data devices, including computers, equipment control systems and digital video cameras. The data signals have a wide bandwidth of about 0.5 MHz to 32 MHz. In this way, the communication system creates a local area network by means of the radiating communication line. The communication system is intended to be used in environments where radio waves do not propagate well, such as in underground environments, and in particular mines. The communication system comprises at least one amplifier connected to the radiating transmission line for periodically amplifying the data signals by demodulating the data signals to recover the data contained therein and then modulating the recovered data into a regenerated radio frequency at a power level permitting transmission and radiation of the regenerated radio frequency data signal. The regeneration amplifiers comprise a processor for temporarily storing and performing error detection and correction functions on the recovered data. The regeneration amplifiers also comprise a device for tracking the data devices within the coverage area of the regeneration amplifier. Information regarding the data devices within the coverage area of each regeneration amplifier is sent to a system server of the communication system and the system server utilizes this information to account for delays caused by the regeneration amplifier. The communication system may support cable modem protocols such as DOCSIS.

A data coupler includes an antenna substrate that is not electrically connected in a DC arrangement to an electric power line, is arranged adjacent to the electric power line, and is connected to a modem. A resonant circuit including an inductance element and a capacitance element is provided in the antenna substrate. In the resonant circuit, the inductance element is magnetically coupled to the electric power line. The resonant circuit transmits a radio-frequency signal superimposed on the electric power line to the modem. The resonant circuit also transmits a transmission signal from the modem to the electric power line.