Abstract: Systems and methods for combining signals from multiple active wireless transmitters are discussed herein. An exemplary system comprises a radio enclosure, a first transmitting RFU, a second transmitting RFU, and a combiner. The first transmitting RFU may be configured to receive a signal, upconvert the signal, compare a phase of the upconverted signal to a predetermined phase value, and adjust the phase of the signal based on the comparison to provide a first phase-adjusted upconverted signal. The second transmitting RFU may be configured to receive the signal, upconvert the signal, compare a phase of the upconverted signal to the predetermined phase value, and adjust the phase of the signal based on the comparison to provide a second phase-adjusted upconverted signal. The coupler may be configured to combine the first and second phase-adjusted upconverted signals to create an output signal and provide the output signal to an antenna for transmission.

Abstract: A dual-band small cell backhaul radio comprises a first communication channel including multiple non-line of sight (NLOS) Sub-6 GHz antennas, a second communication channel including a line of sight (LOS) 60 GHz or E-band antenna, circuitry for managing the first communication channel and the second communication channel, and an interface for providing data and power from a small cell to the first communication channel and the second communication channel, respectively.

Abstract: A method is provided for synchronizing a first radio unit with a second radio unit associated with an all outdoor radios system, the method including: receiving, at the first radio unit and the second radio unit, respectively, a communication signal from a common communication source; receiving, at the first radio unit and the second radio unit, respectively, a reference signal from a common reference source; synchronizing the communication signal at each of the first radio unit and the second radio unit with the reference signal such that the each of the first radio unit and the second radio unit generates an output signal having substantially the same frequency and substantially the same phase; and transmitting the output signal from each of the first radio unit and the second radio unit to a remote receiver through an antenna.

Abstract: A system includes a control board, a controlled board, and a connector connecting the control board to the controlled board. The control board includes a processing unit that configures the reference voltage signals, a non-volatile memory that stores information about the reference voltage signals, and a DAC that outputs the reference voltage signals in accordance with instructions from the processing unit. The controlled board includes: first and second voltage reference devices that receive first and second reference voltage signals, respectively, and a radio-frequency device that receives a first frequency signal and a second frequency signal and outputs a third frequency signal based on one of the first and second reference voltage signals. The connector includes an analog line for providing reference voltage signals to the first and second voltage reference devices and a digital line for providing control signals to activate one of the first and second voltage reference devices.

Abstract: System and method for implementing a link aggregation system, a protection system, and an XPIC application for an all outdoor radios system using a wireless channel operating at a license-free 60 GHz band are provided. The license-free 60 GHz band offers a wide frequency bandwidth that can support a high speed data rate up to 10 Gbps in full duplex mode, frequency reuse, and high security due to its fast oxygen absorption at 60 GHz. As such, a wireless channel operating at the license-free 60 GHz band may be used for a link aggregation system to support wireless local area network (LAN) connections with the speed up to 7 Gbps. In addition, a wireless connection operating at the license-free 60 GHz band may be used to support both XPIC application and protection system for all outdoor radios to achieve a transmission speed of up to 10 Gbps in a full duplex mode.

Abstract: A pixel unit, comprising: an active area pixel electrode and a passive area pixel electrode disposed in the same layer; a thin film transistor switch electrically connected to the active area pixel electrode; and a coupling electrode disposed in a different layer from the active area pixel electrode and electrically connected to the active area pixel electrode, wherein the coupling electrode and the passive area pixel electrode are arranged to be at least partly overlapped with each other to form a coupling capacitance. The present invention also discloses an array substrate comprising the pixel unit and a liquid crystal display comprising the array substrate.

Abstract: A method for performing digital predistortion to a microwave radio transceiver in response to an increase/decrease of transmit power level is disclosed. If the new transmit power level is higher than the current transmit power level, a set of digital predistortion (DPD) coefficients is applied to the transceiver before the issuance of a transmit power level increase command to the transceiver. Otherwise, a transmit power level decrease command is issued to the transceiver before the application of the set of DPD coefficients to the transceiver. Determining the set of DPD coefficients for the transceiver involves two stages: (i) calibrating the transceiver at a room temperature under predefined conditions and generating a DPD lookup table including DPD coefficients at a plurality of predefined temperatures other than the room temperature and (ii) determining the set of DPD coefficients for a given set of operating conditions using entries in the DPD lookup table.

Abstract: A compact microstrip to waveguide dual coupler transition includes a multilayer printed circuit board configured with a rectangular region on an upper surface of the multilayer printed circuit board, wherein the rectangular region has a pair of long edges and a pair of short edges; a transition probe configured on the upper surface of the multilayer printed circuit board, wherein a terminal of the transition probe extends into the rectangular region through a long edge of the rectangular region, and another terminal of the transition probe is electrically connected to a power amplifier; a first coupler probe configured on the upper surface of the multilayer printed circuit board, wherein a terminal of the first coupler probe extends into the rectangular region; and a second coupler probe configured on the upper surface of the multilayer printed circuit board, wherein a terminal of the second coupler probe extends into the rectangular region.

Abstract: Systems and methods for combining signals from multiple active wireless receivers are discussed herein. An exemplary system comprises a first downconverter, a phase comparator, a phase adjuster, and a second downconverter. The first downconverter may be configured to downconvert a received signal from a first antenna to an intermediate frequency to create an intermediate frequency signal. The phase comparator may be configured to mix the received signal and a downconverted signal to create a mixed signal, compare a phase of the mixed signal to a predetermined phase, and generate a phase control signal based on the comparison, the downconverted signal being associated with the received signal from the first antenna. The phase adjuster may be configured to alter the phase of the intermediate frequency signal based on the phase control signal. The second downconverter may be configured to downconvert the phase-shifted intermediate frequency signal to create an output signal.

Abstract: A compact transition structure includes a printed circuit board, wherein there is a rectangular region on one side of the printed circuit board and the rectangular region has a pair of long edges and a pair of short edges; a transition probe on the one side of the printed circuit board, wherein the transition probe extends into the rectangular region through a long edge of the rectangular region and has a terminal near a center of the rectangular region; and a coupler probe on the one side the printed circuit board, wherein the coupler probe extends into the rectangular region through a short edge of the rectangular region and has a terminal before the center of the rectangular region such that the coupler probe is electrically insulated from the transition probe.

Abstract: Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems.

Abstract: Systems and methods for combining signals from multiple active wireless receivers are discussed herein. An exemplary system comprises a first downconverter, a phase comparator, a phase adjuster, and a second downconverter. The first downconverter may be configured to downconvert a received signal from a first antenna to an intermediate frequency to create an intermediate frequency signal. The phase comparator may be configured to mix the received signal and a downconverted signal to create a mixed signal, compare a phase of the mixed signal to a predetermined phase, and generate a phase control signal based on the comparison, the downconverted signal being associated with the received signal from the first antenna. The phase adjuster may be configured to alter the phase of the intermediate frequency signal based on the phase control signal. The second downconverter may be configured to downconvert the phase-shifted intermediate frequency signal to create an output signal.

Abstract: Systems and methods for a stacked waveguide circulator are described. The stacked waveguide circulator may comprise a first side and a second side. The stacked waveguide circulator may also comprise a top and a bottom opposite the top. The top and the bottom may be adjacent to the first and second sides. The stacked waveguide circulator may also comprise a a first port and a second port on the first side. The first port may be vertically above the second port on the first side. Further, the stacked waveguide circulator may comprise a third port on the second side. The stacked waveguide circulator may comprise a first magnet on the top. The first magnet may be configured to assist in directing signals between the first, second, and third ports.

Abstract: A conveying device includes a housing, a linear driving mechanism, a first sliding assembly, a second sliding assembly, and a carrying mechanism. The linear driving mechanism is assembled within the housing. The first sliding assembly is slidably assembled together with the second sliding assembly within the housing, and both sliding assemblies are driven by the linear driving mechanism to slide horizontally. The carrying mechanism is slidably sandwiched between the first sliding assembly and the second sliding assembly. The first sliding assembly and the second sliding assembly are driven by the linear driving mechanism to slide within the housing along either a same direction or along opposite directions. The carrying mechanism may slide linearly together with the first sliding assembly and the second sliding assembly, or slide upwards and downwards perpendicular to the linear sliding direction of the first sliding assembly and the second sliding assembly.

Abstract: Systems and methods for a stacked waveguide circulator are described. The stacked waveguide circulator may comprise a first side and a second side. The stacked waveguide circulator may also comprise a top and a bottom opposite the top. The top and the bottom may be adjacent to the first and second sides. The stacked waveguide circulator may also comprise a a first port and a second port on the first side. The first port may be vertically above the second port on the first side. Further, the stacked waveguide circulator may comprise a third port on the second side. The stacked waveguide circulator may comprise a first magnet on the top. The first magnet may be configured to assist in directing signals between the first, second, and third ports.

Abstract: Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems.

Abstract: A notebook computer includes a data processing unit, and a display unit pivotally connected with one side of the data processing unit. The display unit has a first casing member, a second casing member, and a third casing member. The first casing member is immovably disposed on the third casing member. The second casing member is separably combined upon the first casing member, which includes a plurality of first through slots, second through slots and a plurality of protrusions. The second casing member includes a plurality of first baffles and second baffles. The first casing member and second casing member can be easily combined with or separated from each other.

Abstract: A conveying device includes a housing, a linear driving mechanism, a first sliding assembly, a second sliding assembly, and a carrying mechanism. The linear driving mechanism is assembled within the housing. The first sliding assembly is slidably assembled together with the second sliding assembly within the housing, and both sliding assemblies are driven by the linear driving mechanism to slide horizontally. The carrying mechanism is slidably sandwiched between the first sliding assembly and the second sliding assembly. The first sliding assembly and the second sliding assembly are driven by the linear driving mechanism to slide within the housing along either a same direction or along opposite directions. The carrying mechanism may slide linearly together with the first sliding assembly and the second sliding assembly, or slide upwards and downwards perpendicular to the linear sliding direction of the first sliding assembly and the second sliding assembly.

Abstract: A radio frequency receiver comprising a receiver module, an intermediate frequency (“IF”) module, a synthesizer module and a controller module. The receiver module receives a radio frequency signal and provides a baseband in-phase signal and a baseband quadrature signal, eliminates a sideband of the in-phase and quadrature signals to create a first and a second signal, downconverts the first and second signal to a first and a second IF signal, and selects one of the first or second IF signals. The IF module receives the first or second IF signal, performs analog-to-digital conversion on the first or second IF signal, and demodulates the digitally converted IF signal. The synthesizer module receives a programmable reference signal, downconverts the reference signal to an IF feedback signal, downconverts the reference signal to a baseband feedback signal, provides the IF feedback signal to the IF module, and provides the baseband feedback signal to the receiver module.

Abstract: A radio frequency transmitter comprising a modem which receives one or more input data signals and an adaptive predistortion signal and provides a baseband in-phase signal and a baseband quadrature signal. The transmitter may comprise a power amplifier module which receives the in-phase and quadrature phase signals and provides a radio frequency output signal. A predistortion module receives the radio frequency signal, downconverts the radio frequency signal to an intermediate frequency signal, and downconverts the intermediate frequency signal to a baseband feedback signal. The transmitter samples the feedback signal and provides an adaptive predistortion signal to the modem.