67results about How to "Improve signal transmission stability" patented technology

Embodiments of the present invention provide a signal transmission method and apparatus used in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, to enhance stability of signal transmission and resist time-frequency dispersion. The signal transmission method used in the OFDMA wireless communication system provided by an embodiment of the invention includes: converting an L×1 symbol vector into an N×1 modulating signal vector according to a loading factor fed back by a receiving party, in which value of N is known, both L and N are natural numbers larger than one, N is larger than or equal to L, the loading factor is a ratio of L and N; mapping the N×1 modulating signal vector into N time-frequency grids; and converting the N time-frequency grids into a signal waveform and sending the signal waveform to the receiving party.

A connecting structure comprises a board-side connector and a wire-side connector. The board-side connector comprises a frame pedestal surrounding an accommodating chamber; a metal outer shell covering the exterior of the frame pedestal; a metal inner shell mounted to a mounting hole at a rear end of the accommodating chamber; and a transmission main body mounted to an interior of the metal inner shell. The wire-side connector comprises a transmission main body having multiple terminals having multiple first ends soldered to discrete core wires of a wire cable and multiple second ends configured to contact terminals of the board-side connector; a clamp cage at a rear side of the transmission main body; and a plastic case surrounding an accommodating chamber, wherein the accommodating chamber receives second ends of the terminals.

An electrical connector includes an electrically insulative housing that has a rear accommodation space, a front receiving unit for receiving a matching electrical connector, terminal slots formed in the front receiving unit and extended to the rear accommodation space and recessed locating portions symmetrically disposed at two opposite lateral sides, a circuit board mounted in the rear accommodation space of the housing and having signal terminals extended from the front side thereof and respectively inserted into the terminal slots of the housing and suspending in the front receiving unit of the housing, an adapter module fastened to the rear bottom side of the circuit board and carrying a plurality of input terminals that have the respective front connection portions respectively electrically connected to the metal contacts of the circuit board and the respective rear bonding portions downwardly extending out of the bottom wall of the adapter module for bonding to an external circuit board, grounding spring plates respectively mounted in the recessed locating portions of the housing and bonded to the circuit board for grounding, and a metal shield surrounding the housing and the adapter board and kept in positive contact with the grounding spring plates for grounding.

A multi-frequency antenna comprises a radiation conductor, a connection interface device, a ground plane, a feeder cable, and an extension conductor. The radiation conductor further comprises a feeder member and a connection member extending serpentinely and far away from the feeder member and having a terminal. One lateral side of the connection interface device is connected to the terminal of the connection member. Another lateral side of the connection interface device is arranged on the ground plane and electrically connected to the ground plane. The present invention adopts a loop-antenna design. In the present invention, a radiation conductor is used to excite a low-frequency resonant mode and a first high-frequency resonant mode, and an extension conductor is used to excite a second high-frequency resonant mode, whereby the antenna system covers several operation frequency bands and features broadband.

A crosstalk-proof plug connector has an insulating housing, a mounting bracket, multiple first terminals, multiple second terminals and a shell. The first terminals are mounted on the insulating housing. The second terminals are mounted on the mounting bracket. Each terminal has a mounting section, a soldering section and a contacting section. The soldering sections are arranged in a transverse row with a specific sequence to prevent crosstalk interfering with signal transmission.

Embodiments of the present invention provide a signal transmission method and apparatus used in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, to enhance stability of signal transmission and resist time-frequency dispersion. The signal transmission method used in the OFDMA wireless communication system provided by an embodiment of the invention includes: converting an L×1 symbol vector into an N×1 modulating signal vector according to a loading factor fed back by a receiving party, in which value of N is known, both L and N are natural numbers larger than one, N is larger than or equal to L, the loading factor is a ratio of L and N; mapping the N×1 modulating signal vector into N time-frequency grids; and converting the N time-frequency grids into a signal waveform and sending the signal waveform to the receiving party.

A male connector has an insulating housing, multiple signal terminals, and multiple grounding modules. The signal terminals are mounted through the insulating housing. The grounding terminal modules are mounted through the insulating housing. Each grounding terminal module is integrally formed into one piece and has multiple grounding terminals. Adjacent grounding terminals are connected integrally to each other so that the grounding terminals of each grounding terminal module are arranged in a line. The integrally formed ground terminal modules reduce a total tolerance of the grounding terminals and increase the production rate of the male connector.

A high frequency connector includes a first module and a second module for signal transmission. The two modules are easily manufactured and assembled. The disclosed high frequency connector can maneuverably connect with the connector thereof according to the required direction of signal transmission so that competent transmissive connection is achieved when the two modules are assembled and thus preventing generation of noise. The volume of each of the two modules is precisely designed so that the high frequency connector facilitates reduction in power loss when being implemented for the purpose of signal transmission.

A connector module includes a board connector and a cable connector. The board connector includes a board connecting body whereon a slot is formed, conductive terminals disposed on the board connecting body and extending into the slot, and two metal pads disposed on two sides of the board connecting body and each having a resilient buckle. The cable connector includes a cable connecting body including an installation portion and two engaging portions, and a flexible transmission unit installed in the installation portion. Contacts are disposed on a front end of the flexible transmission unit. The front end of the flexible transmission unit is inserted into the slot, the conductive terminals contact with the contacts, and the resilient buckles engage with the engaging portions when the cable connector is connected with the board connector.

A cavity filter having two series of resonance chambers bilaterally connected between an antenna port and two opposing signal input / output ports, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected between the respective signal input / output port and the associating last resonance chamber to perform cross-coupling feedback, improving the quality of the signal received by the signal receiver using the cavity filter and enhancing signal transmission performance.

A connecting structure comprises a board-side connector and a wire-side connector. The board-side connector comprises a frame pedestal surrounding an accommodating chamber; a metal outer shell covering the exterior of the frame pedestal; a metal inner shell mounted to a mounting hole at a rear end of the accommodating chamber; and a transmission main body mounted to an interior of the metal inner shell. The wire-side connector comprises a transmission main body having multiple terminals having multiple first ends soldered to discrete core wires of a wire cable and multiple second ends configured to contact terminals of the board-side connector; a clamp cage at a rear side of the transmission main body; and a plastic case surrounding an accommodating chamber, wherein the accommodating chamber receives second ends of the terminals.

The present invention pertains to a coaxial connector including an insulating base disposing a central terminal passing through a hole thereof to facilitate signal transmission, a first and a second terminals including secure plates to be disposed on a deep slot of the insulating base, a waterproof ring, and a metal shell. Wherein, the secure plates have fixing flanks to strengthen the firmness between the terminals and the insulating base. Wave-shaped contacts with high resilience further protrude from the fixing flanks to prop against or separate from the switch button of the mobile communication device for getting through or disconnecting the communication. Through the highly elastic contacts, the terminals still maintain to firmly contacting with the switch button or rapidly bouncing back even when being subjected to a long-term compression and ensure the stability of the mutual signal transmission among the mobile communication devices.

The invention relates to a through hole filling and plating method applied to an optical module high-density interconnection HDI board. The through hole filling and plating method sequentially comprises the steps of copper reduction, positive and negative drilling, trepanning and drilling, adhesive removal and copper deposition, first exposure and development, through hole electroplating, film stripping, plate grinding, second exposure and development and hole filling and electroplating. According to the through hole filling and plating method applied to the optical module high-density interconnection HDI board, drilling is carried out twice, so that the cross section of a through hole is in the shape of a step which is small at the middle portion and is large at two ends; the step-by-stepfilling and plating of the through hole are achieved through two hole filling steps on the middle portion and the two ends of the through hole; and therefore, the core wrapping phenomenon of the through hole in a filling and plating process is prevented, and the signal transmission stability of the circuit board is effectively improved.

The invention discloses a composite cable for a computer. The composite cable comprises a square rubber framework of which the cross section is square, wherein a one-quarter arc rubber baffle board isconnected between middle portions of every two adjacent inner side boards in the square rubber framework, the central portion of the square rubber framework is provided with a data cable core, an outer wall of the data cable core contacts with an outer wall of the one-quarter arc rubber baffle board, an inner chamber formed by each one-quarter arc rubber baffle board and the square rubber framework is internally provided with a control cable core, an outer side of the square rubber framework is sequentially wrapped in a porcelain fireproof compound belt strapping layer, a ratproof metal wirearmored layer, a carbon black paper insulation shielding layer, a nanometer EP rubber inner sheath layer and an oversheath layer. The composite cable is advantaged in that the square rubber frameworkand the one-quarter arc rubber baffle boards are matched for use, the structure is novel and compact, design is reasonable, signal transmission stability is good, the volume is small, weight is light,the anti-pressing pull-resistant effect is good, and the composite cable is safe and convenient to use.

A cavity filter having two series of resonance chambers bilaterally connected between an antenna port and two opposing signal input / output ports in a resonant space therein, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected to the respective signal input / output port and kept in communication with the associating last resonance chamber through one respective channel and the second resonance chamber thereof kept in communication with the last second resonance chamber thereof through one respective channel to provide cross-coupling feedback, getting better stop-band flatness and improving signal quality.

A cavity filter having two series of resonance chambers symmetrically and bilaterally connected between an antenna port and two opposing signal input / output ports in a resonant space therein, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected to the respective signal input / output port and kept in communication with the associating last resonance chamber through one respective channel and the second resonance chamber thereof kept in communication with the last second resonance chamber thereof through one respective channel to provide cross-coupling feedback, getting better stop-band flatness and improving signal quality.

The invention discloses a connection structure of a cable and a printed circuit board (PCB). The connection structure comprises the PCB and more than one cable, wherein each cable is provided with a differential signal line pair, an insulation layer and a metal shielding jacket, the insulation layer wraps the differential signal line pair, the metal shielding jacket wraps the insulation layer, a substrate is arranged on the PCB, a GND layer is arranged in the substrate, a signal end and a GND BAR are arranged on a surface of the substrate, the GND BAR is connected to the GND layer in a conduction layer, and the metal shielding jacket of the cable is pasted onto the GND BAR by conductive glue so as to achieve electrical conduction of the metal shielding jacket and the GND BAR; or a grounding metal wire is arranged in the cable, the grounding metal wire extends out of an end part of the metal shielding jacket and is returned back, and a return-back part of the grounding metal wire is electrically connected with the GND BAR for conduction. Therefore, the GND BAR is arranged on the PCB, the grounding metal wire is connected with the GND BAR or the metal shielding jacket is circuit-shorted with the GND BAR to achieve characteristic impedance matching, and an unstable variable during manual operation is effectively eliminated.

Electrical connector grounding structure includes electrically insulative housing having accommodation hole located on base thereof and tongue plate forwardly extended from base, conducting terminal sets positioned in electrically insulative housing and including one or more than one grounding terminal, one or more than one power terminal and plurality of signal terminals, conducting member mounted in accommodation hole and having first contact portion located at top and second contact portion downwardly extended from first contact portion and kept in contact with grounding terminal, and shielding shell surrounding electrically insulative housing and kept in contact with first contact portion. Grounding terminal, conducting member and shielding shell form common ground loop to guide electromagnetic interferences and noises generated around electrical connector to circuit board for grounding release, making overall signal transmission quality more stable and reliable and achieving the effect of improving overall signal transmission stability.

A male connector has an insulating housing, multiple signal terminals, and multiple grounding modules. The signal terminals are mounted through the insulating housing. The grounding terminal modules are mounted through the insulating housing. Each grounding terminal module is integrally formed into one piece and has multiple grounding terminals. Adjacent grounding terminals are connected integrally to each other so that the grounding terminals of each grounding terminal module are arranged in a line. The integrally formed ground terminal modules reduce a total tolerance of the grounding terminals and increase the production rate of the male connector.

The invention discloses a hub motor with a torque sensing function. The hub motor comprises a hub, a motor core contained in the hub and a driving shaft sleeve fixed coaxially with the hub to be used for mounting a flywheel. The driving shaft sleeve comprises an outer sleeve body, an inner sleeve body and a plurality of connecting bars, wherein the outer sleeve body and the inner sleeve body are arranged coaxially, and the multiple connecting bars are connected between the outer sleeve body and the inner sleeve body and distributed at intervals in the circumferential direction. The outer sleeve body and the hub are fastened. A flywheel connecting structure used for being connected with the flywheel in a fastened mode is arranged on the inner sleeve body. Torque induction magnetic steel is fixedly arranged on the inner sleeve body. A signal output plate is fixedly arranged on the outer sleeve body. A Hall element corresponding to the torque induction magnetic steel is arranged on the signal output plate.

The invention discloses a torque and speed sensor for an electric bicycle which comprises a chain wheel, a crank and a deformation frame. The deformation frame is formed by an outer ring, an inner ring and a plurality of connecting ribs, wherein the outer ring and the inner ring are coaxially arranged, the connecting ribs are distributed in a radial mode, and the connecting ribs are connected between the inner ring and the outer ring. The inner ring is fixed to the crank, the outer ring is fixed to the chain wheel, and torque sensing magnetic steel and a linear hall integrated circuit corresponding to the torque sensing magnetic steel are respectively arranged on the inner ring and the outer ring. The torque and speed sensor further comprises a movable seat and a fixed seat, wherein the movable seat and the fixed seat are coaxially distributed together with the deformation frame, the movable seat is connected to the deformation frame, an auxiliary edge winding is fixed to the movable seat, the fixed seat is connected to the movable seat and can rotate around the axis of the movable seat, an original edge winding and a signal receiving plate are fixed to the fixed seat, the original edge winding and the auxiliary edge winding jointly form an isolation transformer, the original edge winding is electrically connected with an alternating-current generator arranged on the signal receiving plate, an outgoing line is arranged on the signal receiving plate, and the auxiliary edge winding is electrically connected with a signal outputting plate. The torque and speed sensor for the electric bicycle is simple in structure, stable in performance and high in sensitivity.

A backup transmission structure of an electronic device includes a switching unit, and primary and backup transmission circuits connected to host and terminal equipment respectively. The primary and backup transmission circuits include first and second switches respectively. The switching unit normally outputs an ON signal to the first switch to connect the primary transmission circuit for an electric connection of the host and terminal equipment. The primary transmission circuit obtains a circuit disable signal to switch outputting the ON signal to the second switch for electrically connecting the backup transmission circuit, so as to maintain an electric connection between the host equipment and the terminal equipment, and improve the stability of signal transmissions between the host equipment and the terminal equipment to overcome the shortcomings of the prior art adopting a host equipment that uses a single transmission circuit to connect terminal equipment in series and resulting in frequent breakdowns.

An electrical receptacle connector includes an insulated housing, flexible terminals, and flat terminals. The insulated housing includes a base portion and a tongue portion. The flexible terminals and the flat terminals are held in the base portion and disposed at an upper surface of the tongue portion. The flat terminals are arranged in front of the flexible terminals and include two pairs of signal terminals and a ground terminal between the signal terminals. Each flat terminal includes a flat contact portion, a tail portion, and a body portion between the flat contact portion and the tail portion. The body portion of the ground terminal includes two first widening portions extended outward from two sides thereof. A first distance is defined between each first widening portion and the body portion of the corresponding nearest signal terminal. A second distance is defined between the two signal terminals for each pair thereof.

The invention is applicable to the technical filed of a cable, and provides a network cable used for a drag chain system. The cable comprises multiple pairs of mutually-stranded core wires, inner division sheaths, a shielding layer, an inner lining sheath and an outer lining sheath; each pair of the core wires comprises two core wires which are stranded mutually; each core wire comprises a conductor and an insulating layer; the conductor is formed by multiple strands of oxygen-free copper wires in a stranding manner; the periphery of the conductor is coated with the corresponding insulating layer; the periphery of each core wire pair is coated with the corresponding inner division sheath; the peripheries of the multiple inner division sheaths are coated with the inner lining sheath; the periphery of the inner lining sheath is coated with the shielding layer; the periphery of the shielding layer is coated with the outer lining sheath; and the insulating layer comprises the following components based on mass percentages: 34-40% of styrene-butadiene block copolymer hydride, 14-26% of white mineral oil, 0.1-0.2% of antioxidant, 15-30% of polypropylene and 5-20% of calcium carbonate. The service life and signal transmission stability of the cable can be greatly prolonged and reinforced.

A spring probe includes a needle, a spring sleeve sleeved onto the needle, and a protrusion. The spring sleeve has upper and lower non-spring sections, and at least a spring section therebetween. The needle has a bottom end portion protruding out from the lower non-spring section, and a top end portion located in the upper non-spring section. The protrusion is located at one of the top end portion and the upper non-spring section. The needle is movable relative to the upper non-spring section from an initial position to a connected position where the upper non-spring section is electrically connected with the needle through the protrusion when receiving an external force. As a result, the spring probe effectively prevents signals from being transmitted through the spring section, thereby improving stability of signal transmission and preventing the spring section from fracture.

A connector mainly includes a main base body, one end of which has a guide sleeve, the other end of the main base body has a butting holes, and the guide sleeve is connected with a connecting module. The connecting module further includes a connecting base which includes a connecting element. The connecting module further includes a butting seat correspondingly engages the guide sleeve, and a conductive module is housed inside the main base body. The conductive module further includes a central pin, and the central pin is provided with a second waterproof gasket. The second waterproof gasket for the central pin extending therethrough and abuts against a side of a convex seat. The central pin extends through a sleeve which is correspondingly connected with a conductive base, and the central pin is sleeved in the sleeve and the conductive base. Finally, the conductive module is further correspondingly sleeved with a fixing seat and a protective sleeve in sequence. A waterproof layer protrudes outward on the outer peripheral surface.