788results about How to "Improve transmission distance" patented technology

The present invention provides an optical switching apparatus and method of an eNB. The above apparatus includes: a fiber transceiver module (102), configured to receive an optical signal which carries transmission address information from the source input end (101) and transmit the optical signal; a transmission address module (103), configured to receive the above optical signal, query routing, and manage and maintain transmission address(s); a switching control module (104), configured to obtain the transmission address information of the optical signal, analyze and select an optical switching mode, and transmit a routing control signal which carries the transmission address information and the optical switching mode; and an optical switching and routing module (105), configured to receive the above optical signal and transmit the same to a destination output end (106) by the fiber transceiver module (102), receive the routing control signal of the switching control module (104), select a routing and transmit the optical signal to the destination output end (106). According to the present invention, the RRU and the BBU of the eNB can communicate with devices of the BBU and the RRU of the different manufacturers, can be applied to the multi-mode base station, and can adapt to the different mode; therefore the transmission distance is enlarged.

The phase sensitive amplifier according to the present invention is a phase sensitive amplifier that uses the optical mixing using a nonlinear optical effect to amplify the signal light. The phase sensitive amplifier according to the present invention includes: the first second-order nonlinear optical element; and the second second-order nonlinear optical element. The first second-order nonlinear optical element causes the fundamental wave light to generate second harmonic light used as pump light and separates only the second harmonic light. The second second-order nonlinear optical element includes a multiplexer to multiplex the signal light with the second harmonic light and spectrally separates only the amplified signal light. The multiplexed signal light and second harmonic light are used subjected to parametric amplification.

The present invention relates to a wavelength-division multiplexed passive optical network. In particular, it relates to a technology for minimizing the optical loss at a wavelength-division multiplexed passive optical network based on wavelength-locked light source Thereby it improves the transmission quality and increases the transmission distance.A 4-port optical path setting device of the present invention increases the amount of light injected into an optical transmitter and thereby improves the wavelength-locking characteristic of a light source. In addition, it can decrease the optical transmission loss in an optical transmission path, and by an optical amplifier being inserted therein; it can also compensate the optical loss in an optical transmission path.In the present invention, a 4-port optical path setting device having the characteristics described above and a method for fault recovery without an additional optical loss are presented.

Provided is a dual polarization antenna realized by using four inverted F-type radiators and a Radio Frequency Identification (RFID) reader employing the dual polarization antenna. The dual polarization antenna includes a ground plate and four inverted F-type radiators set up on the ground plate. Currents of the same phase are fed to the first and second inverted F-type radiators each other. Currents of an inverted phase are fed to the third and fourth inverted F-type radiators each other. The four inverted F-type radiators form an angle of 90° with one another. The first and second inverted F-type radiators radiate electric wave of vertical polarization and the third and fourth inverted F-type radiators radiate electric wave of horizontal polarization. Since the dual polarization antenna has excellent orthogonal and isolation characteristics, the antenna can extend a transmission distance between the reader and the tag and improve a communication quality.

In an optical access network using an optical switching device, a 2×1 optical splitter in the uplink and downlink directions is eliminated to extend the transmission distance between the OLT and the ONU. An optical switching device includes a downlink optical switch element for switching a downlink optical signal sent by an OLT, an uplink optical switch element for switching an uplink optical signal sent by a plurality of ONU, an O / E for converting a downlink optical signal to a first electrical signal, an E / O for converting the first electrical signal to a downlink optical signal and inputting the downlink optical signal to the downlink optical element, an O / E for converting an uplink optical signal output from the uplink optical switch element to a second electrical signal, and an E / O for converting the second electrical signal to an uplink optical signal and sending the uplink optical signal to the OLT.

A touch display apparatus including a light guide plate, a light emitting module, a display panel, a plurality of prism structures, an image transmission unit, and an image detector is provided. The light guide plate has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface. The light emitting module includes at least one visible light source and at least one invisible light source. The prism structures are disposed between the first surface and the display panel. The image transmission unit includes a wedge portion and a light guide portion. The wedge portion is disposed between the prism structures and the display panel. The image detector is disposed beside the light guide portion for receiving the invisible light beam from the light guide portion. A backlight module is also provided.

The invention provides a MESH network system applicable to smart home, a networking method and a communication method. The MESH network system comprises a gateway deice, a routing device, and a terminal device. The gateway device is used for communicating with the terminal device directly or via the routing device. The routing device is used for forwarding data. The terminal device is used for collecting data and communicating with the gateway device directly or via the routing device. The gateway device and the routing device respectively search other devices within the communication radius thereof in real time, and are connected with a device of which the power meets a predetermined standard within the communication radius. According to the MESH network system provided by the invention, the transmission distance of the smart home network is increased, and low system energy consumption, reliable transmission and fast networking are realized.

The invention discloses a data communication server which comprises a power circuit module, a network port module, a microprocessor and a serial circuit module. The network port module, the microprocessor and the serial circuit module are sequentially coupled with one another, and the power circuit module is connected with the microprocessor to provide a working power source for the microprocessor; the serial circuit module is configured in such a manner that serial signals can be processed by the serial circuit module; the network port module is configured in such as a manner that the network port module can be communicated with networks via at least one network port so as to transmit and receive network signals; the microprocessor is configured in such a manner that signals can be converted between Ethernet protocols and serial protocols by the microprocessor, so that the serial signals from the serial circuit module can be converted into the network signals, or the network signals from the network port module can be converted into the serial signals. The data communication server has the advantages that a system with excellent performance and comprehensive functions can be implemented by advanced technologies, data can be transparently transmitted among serial ports and the networks via the data communication server, and the networks can be connected with one another, so that the data can be remotely transmitted.

A portable electronic device capable of extending near field communication distance comprises a watchband portion, a power supply module, an NFC module and a relay coil group arranged in the watchband portion. The power supply module comprises a wireless charging receiving coil, a charging circuit and a charging battery. The NFC module comprises an NFC antenna and an NFC circuit. The relay coil group receives external electromagnetic wave energy and transmits the external electromagnetic wave energy to the wireless charging receiving coil, so that the charging battery is charged through the charging circuit. The relay coil group also receives an external NFC read-write signal and forwards the external NFC read-write signal to the NFC antenna, or receives NFC data or an internal NFC read-write signal sent by the NFC antenna and forwards the NFC data and the internal NFC read-write signal to other electronic devices outside the electronic device. According to the electronic device in the invention, the transmission distance of signals is extended through the magnetic resonance between coils, and the positions of the coils do not need to be corresponding completely, so that positioning-free charging and NFC are realized, and the convenience and usage efficacy of wireless charging and NFC are improved.

An apparatus for transmitting signals between UWB networks is disclosed, which comprises: a signal converter for converting received optical signals from another UWB network into UWB signals, transmitting the converted optical signals within a UWB network, and converting UWB signals generated from within the UWB network into optical signals; and an optical signal transmission means for directing the received optical signals the signal converter and a further UWB network.