341results about How to "Signal transmission is convenient" patented technology

An embodiment of the invention uses a predistortion correction signal to combination the modulated RF signal by an analog multiplier for linearization of power amplifiers having nonlinear characteristics such as those used in wireless RF transmitters. A predistortion controller comprises a plurality of down converters for retrieving both the ideal non-distorted information and the feedback distorted information, together with pre-stored digitally-indexed predistortion information stored, for example, in a look-up table. The digitally-indexed information models nonlinear characteristics of the high power amplifier, and is stored prior to processing of pre-compensation in the power amplifier. When the predistortion information is combined with the modulated RF signal in the analog multiplier, the result is a substantially linear information transmission from the power amplifier. In an embodiment of the system, the modulated RF input signal and the feedback signal from PA output are down-converted, respectively, by analog devices, such as mixers, after which the analog intermediate frequency (IF) signals are digitized by analog-to-digital converters for digital predistortion correction processing, followed by predistortion processing performed by, for example, a DSP or FPGA chip to generate a digital correction control signal, which is then converted to an analog signal by a digital-to-analog converter, followed by combining the analog correction signal with the RF modulated input signal to yield the input to the power amplifier.

A flexible printed circuit board (FPCB) and FPCB manufacturing method that improves a signal transfer characteristic at a high speed. The FPCB includes an insulating layer having a signal pattern that transfers signals, a cover layer formed on the signal pattern, and a shielding layer formed at a position opposite to the signal pattern. The shielding layer faces at least one of the insulating layer and the cover layer across anspace formed there between.

An antenna implantable through minimally invasive techniques, preferably comprising a coil with conductive probes is provided. The antenna is preferably superelastic nickel-titanium having an insulative coating. The antenna may conduct a signal originating from a device external to the body of the implantee, or from another implanted device connected to the antenna depending on whether the antenna is employed for sending, receiving, or transceiving signals. Signals may contain data, operational commands, and may be used to transfer power. The implantable antenna may be connected to another implanted device, such as a blood pressure monitor, or may be implanted as a stand-alone device for purposes such as stimulating tissue.

An image capture and display system comprises an image capture array positioned on a vehicle, the image capture array comprising a plurality of image sensing members. At least one transmitter is provided for transmitting images from the image sensing members. The system also includes a monitor display array positioned remotely from the image capture array. The monitor display array comprises a display monitor for and corresponding to each image sensing member, and a receiver for receiving the images corresponding to each transmitter.

Disclosed herein is a contact array of a universal serial bus (USB) connector including a first signal differential pair, a second signal differential pair and a third signal differential pair, wherein the second signal differential pair is disposed between the first and third signal differential pairs, and at least one power contact or ground contact is disposed between the first and second signal differential pairs, or between the second and third signal differential pairs.

A receiver (30) with an antenna circuit is disclosed, which antenna circuit comprises a coil (31) and either a monopole (35) or a dipole connected to the coil (31). The antenna circuit captures a signal with a wavelength transmitted by a transmitter (1). The coil (31) captures the signal and generates therefrom a current having a frequency corresponding to the wavelength. The coil (31) is dimensioned such that the current is distributed uniformly within the coil (31) at each point in time. Preferably, the monopole (35) or a leg of the dipole has a length corresponding to less than 5% of the wavelength. The invention further relates to a radio transmitter of the same kind. Finally, the invention relates to an RFID tag, a smart card, a mobile device, and a hearing aid, each comprising an inventive receiver (30) and / or an inventive transmitter.

Disclosed herein is a contact array of a universal serial bus (USB) connector including a first signal differential pair, a second signal differential pair and a third signal differential pair, wherein the second signal differential pair is disposed between the first and third signal differential pairs, and at least one power contact or ground contact is disposed between the first and second signal differential pairs, or between the second and third signal differential pairs.

A balanced transmission cable connector with improved high speed signal transmission characteristics is realized by directly connecting a balanced transmission cable to a plug structure. The plug structure includes a block unit, a ground contact, and adjacent pairs of a first signal contact and a second signal contact. The ground contact and the adjacent pairs of the first signal contact and the second signal contact are aligned in an alignment direction with respect to one another and are held by the block unit. The ground contact is disposed in between the adjacent pairs of the first signal contact and the second signal contact. The first signal contact includes a first signal wire connecting portion to which a first signal wire of the balanced transmission cable is connected, and the second signal contact includes a second signal wire connecting portion to which a second signal wire of the balanced transmission cable is connected. The ground contact includes a drain wire connecting portion to which a ground wire of the balanced transmission cable is connected.

An electric element for electric connection of two corresponding electric elements comprises: two conductors; and liquid metals with low impedance connecting to the two conductors. The two conductors keep in contact with the liquid metals at a situation of relative movement so as to reduce significantly the impedance of the conductors and facilitate the signal transmissions.

The invention discloses a radio frequency performance test device comprising a shielding box, an antenna and a clamp. The shielding box comprises a shielding cavity which is internally provided with a fixing plate. The antenna is fixedly connected on the fixing plate. The length direction of the antenna is perpendicular to the fixing plate. The clamp comprises a support and a tray. The support is slidably connected on the fixing plate along a direction close to or away from the antenna. The tray is slidably connected on the support. The sliding direction of the tray is perpendicular to the fixing plate. The tray is used for installing terminal equipment. The antenna transmits a radio frequency signal to the terminal equipment. According to the radio frequency performance test device, the position of the terminal equipment relative to the antenna is rapidly and accurately adjusted by arrangement of the clamp capable of adjusting the position of the terminal equipment so that signal transmission is facilitated, and radio frequency performance test efficiency and test result accuracy can be enhanced.

The invention provides a Pt nano particle-carbon nano tube composite material, a method and an application thereof. The invention is characterized in that ammonia is used for pretreating the carbon nano tube; the carbon nano tube pretreated by the ammonia, sodium citrate, chloroplatinic acid and methanol are used as raw materials; and Pt nano particles are reduced on the outer wall of the carbon nano tube in situ. The weight ratio of the carbon nano tube and chloroplatinic acid, the proportion of the methanol and the sodium citrate and the types of carbon nano tube are improved to obtain the Pt nano particles with smaller particle size and even distribution to wrap the carbon nano tube. The composite material is dispersed in Nafion solution, the mixed solution is dripped on a glassy carbon electrode for natural drying and a thin film modified electrode can be prepared. The electrode has excellent electrocatalytic performance to oxidation reaction of H2O2 and methanol. The method has simple technique, convenient operation, low cost and easy obtaining for the used raw materials, has good application prospect in the electrocatalytic biological sensor and a methanol fuel battery and is applicable to industrial production.

The present invention discloses a method for determining the working status of a wireless network communication device. The method includes determining the probe request or broadcast packet or any wireless packet with its destination address equal to this AP address, and then determining whether extending the time interval of signal transmission based on the detection result. Next, when the device does not receive the probe requests or broadcast packet or any wireless packet with its destination address equal to this AP address within the first predetermined interval, the wireless network communication device will switch to the idle mode. Further, the step of the present invention includes determining whether awakening or shutdown the wireless network communication device based on the result of the detection of the probe request or broadcast packet or any wireless packet with its destination address equal to this AP address within the second predetermined interval.

A shipping container that facilitates communications between wireless communication devices within the shipping container and an external network container includes a keyhole communication device that is adapted for wireless communications with the external network and that includes first and second housing components. The first and second housing components together form an integrated housing structure that extends through a small opening in a wall of the shipping container, with the first housing component being disposed exterior to the shipping container and the second housing component being disposed interior to the shipping container. A first antenna is disposed within the first housing component for communications via a first communications protocol, such as a Bluetooth protocol. A second antenna also may be disposed within the first housing component for communications via a second communications protocol, such as a cellular communications protocol. The communications are controlled by electronic circuitry within the second housing component.

An article for temporarily retaining an optical fiber cable including a stripped terminal portion of at least one optical fiber requiring cleaving followed by polishing of an end face thereof. The article comprises a housing having a recess for a demountable optical fiber holder. A demountable optical fiber holder includes a base-plate having at least a first fiber channel to receive at least one optical fiber. The base plate has a number of pockets. A cover plate for the demountable optical fiber holder includes a spring clamp, at least a first upper channel and a number of posts to mate with the pockets of the base-plate to assemble the holder. The article further includes a guide plate attached to the housing to pivot between a first pivot position and a second pivot position. A rotatable lid attached to the housing rotates between an open position and a closed position. The article temporarily retains the optical fiber cable for cleaving and polishing the end face thereof when the lid is closed.

An assembly structure for a tire pressure transmitter and an inflating valve includes an inflating valve joint, a small shaft, a fastening screw and a tire pressure transmitter connecting member. The inflating valve joint has a lateral through hole diverging from the axis of the inflating valve joint in the downward direction. The tire pressure transmitter connecting member has an axial screw hole, one side of the screw hole is provided with a pivoting base, and the pivoting seat is provided with a pair of pivoting holes. The inflating valve joint is used for connecting an inflating valve; the tire pressure transmitter connecting member is used for combining with a housing of the tire pressure transmitter; the inflating valve joint is arranged on a pivoting part of the tire pressure transmitter connecting member; the small shaft passes through the pair of pivoting holes and the through hole of the inflating valve joint; the fastening screw is screwed into the screw hole of the tire pressure transmitter connecting member, when bearing against the end face of the inflating valve joint, the fastening screw goes on being screwed, so that the housing of the tire pressure transmitter rotates around the small shaft with the top end of the fastening screw as a fulcrum, until supporting points of the housing support to a tire rim.

A card holder is provided, which includes a holding section holding, in an attachable / detachable manner, a plurality of non-contact type IC cards capable of non-contact communication with an external unit, an antenna for external communication communicating contactlessly with the external unit, an antenna for card communication communicating contactlessly with each of the plurality of the non-contact type IC cards held in the holding section, and an amplification section amplifying each of a carrier signal received by the antenna for external communication and transmitted from the external unit and a response signal, to the carrier signal, transmitted from each of the plurality of the non-contact type IC cards and received by the antenna for card communication.

A docking station for use in combined imaging of a tissue wound and a test substrate comprising a sample from a tissue wound, the docking station comprises means for connecting the station to a processor which processes and stores the images. The docking station also incorporates means for receiving a test substrate comprising a sample from a tissue wound. The docking station also includes means for docking a sensor in the station, which sensor detects the light reflected from an illuminated tissue wound, such that an image of the tissue wound can be communicated from the station to the processor. The means for docking is arranged such that when the sensor is docked in the station and the test substrate is received by the docking station, the sensor is positioned to detect the intensity of reflected light from the test substrate and communicates the detected intensity of reflected light to the processor to thus permit combined imaging of the tissue wound and test substrate. An apparatus for use in combined imaging of a tissue wound and a test substrate comprising a sample from a tissue wound, comprises such a docking station together with a sensor which detects the light reflected from a tissue wound and test substrate when illuminated and a test substrate for receiving a sample from a tissue wound. A method of imaging a wound comprises directing light over a wavelength range of less than 50 nm onto the wound (9). The light reflected from the wound (9) is detected with a sensor (5) that is sensitive to the intensity of the reflected light. The intensity of the reflected light is measured.

A communication device comprises a front housing, a back cover, a main body, a display panel, a signal feed point, a ground point, an antenna and a conductor. The main body is located between the front housing and the back cover. The antenna is installed on the main body and corresponding to an adjacent edge of the display panel. The antenna comprises a first metal part and a second metal part. The first metal part is coupled to the signal feed point, and the second metal part is coupled to the ground point. A coupling gap is defined between the conductor and the antenna, and at least one part of the conductor corresponds to the display panel.

The invention relates to a single-station position and attitude measurement method for a heading machine based on iGPS. A single-station multi-point time-sharing measurement platform is installed at an appropriate position of a tunnel roof behind a heading face; machine-mounted receivers and a task processor are fixedly mounted on the body of the fixed mounting; a solving computer is placed at a safe position like a position behind a tunnel; a transmitting station rotates around an O1 axis under the action of an automatic rotary apparatus so as to realize movement to different positions and transmitting of sector laser signals and synchronization pulse optical signals; each machine-mounted receiver separately receives the optical signals transmitted by the transmitting station from different positions, converts the optical signals into electric signals and transmits the electric signals to the task processor; and then the solving computer solves position coordinates of each machine-mounted receiver in an overall coordination system and calculates the attitude parameters of the body of the heading machine according to the known position coordinates of each machine-mounted receiver. The method realizes measurement of the position and attitude of the body of the heading machine through one single transmitting station and has the advantages of low cost, high precision and convenience in operation.

The invention relates to the technical field of power line detection, in particular to a wireless digital power supply line fault alarm device and a wireless digital power supply line fault alarm method. The device comprises a signal pick-up unit, a processing unit, and an indicating unit, and is characterized in that: the signal pick-up unit comprises a conductive rubber block, a magnetic permeability material and a coil; the conductive rubber block and the magnetic permeability material form a button clamping structure; the coil is wound on the magnetic permeability material to form a current transformer for picking up current and voltage signals; the processing unit comprises a power-off detection unit, a power supply detection unit, a short-circuit detection unit and a grounding detection unit; and the indicating unit comprises a flop unit, an indicator light unit and a radio-frequency unit. The system and the method have the advantages that: 1) wireless signals are uploaded to a control center, so fault points can be accurately positioned in real time; 2) the labor intensity is lightened, and the fault points are quickly transmitted to the control center; and 3) the indication of faults is obvious, and the system and the method are suitable for wide promotion and have important effect of ensuring safe operation of a power grid.

A shipping container that facilitates communications between wireless communication devices within the shipping container and an external network container includes a keyhole communication device that is adapted for wireless communications with the external network and that includes first and second housing components. The first and second housing components together form an integrated housing structure that extends through a small opening in a wall of the shipping container, with the first housing component being disposed exterior to the shipping container and the second housing component being disposed interior to the shipping container. A first antenna is disposed within the first housing component for communications via a first communications protocol, such as a Bluetooth protocol. A second antenna also may be disposed within the first housing component for communications via a second communications protocol, such as a cellular communications protocol. The communications are controlled by electronic circuitry within the second housing component.

The present invention discloses a flat cable connection wire assembly including a flexible flat cable and a connector, and the flexible flat cable includes a plurality of core wires, and the connector includes a plastic body and a plurality of terminals for an electric connection. The plastic body includes a plurality of slots arranged with a specific interval apart from one another and disposed at an end of the flexible flat cable for positioning each terminal, such that a specific interval is formed between terminals and provided for soldering each core wire with each terminal in the slot, while coupling with the connector. The invention provides a more secured and reliable structure of the flat cable connection wire assembly.

A data processing system enabling an outstanding-based variable flow control is provided. The data processing system includes a first semiconductor integrated circuit possessing an initiator and a second semiconductor integrated circuit possessing a target. The initiator transmits a request packet to the target, the target transmits a response packet to the initiator, and split transaction interface is practiced. The initiator includes an outstanding number counting circuit for counting an outstanding number defined by the difference in number between the request packets transmitted and the response packets received. The request packet transmission number is controlled so that the count value of the outstanding number counting circuit may not exceed the outstanding number to which the target can respond. The outstanding number is dynamically changeable to a suitable number so that the maximum latency from the issue of the request packet to the reception of the response packet is suppressed.

The invention provides an epoxy modified polyphenylene ether resin, the epoxy modified polyphenylene ether resin possesses a structural unit shown in a formula (I), and a preparation method comprises the following steps 100 parts of solid polyphenylene ether resin adds a polymerization reaction solvent for dissolving into a liquid polyphenylene ether resin solution, and then 5-60 parts of epoxy resin and 0.001-5 parts of a catalyst are added in the solution, stirred and mixed at the temperature of 80-140 DEG C for 1- 3 hours to obtain a pre-polymerization solution. The invention also discloses a resin composition containing the epoxy modified polyphenylene ethesr resin, and an application in preparation of printed circuit board. The epoxy modified polyphenylene ether resin composition has the advantages of excellent glass fiber cloth impregnation, simple preparation process, high efficiency, environmental protection and high product purity controllability; can be used for making a laminated material and a copper clad pressure plate, possess excellent heat resistance and dielectric properties, and is in favor of signal transmission of high frequency circuit board.