61results about How to "Good decoupling effect" patented technology

A printed wiring board includes a mounting portion on which a dual core processor including two processor cores in a single chip can be mounted, power supply lines, ground lines, and a first layered capacitor and a second layered capacitor that are independently provided for each of the processor cores, respectively. Accordingly, even when the electric potentials of the processor cores instantaneously drop, an instantaneous drop of the electric potential can be suppressed by action of the layered capacitors corresponding to the processor cores, respectively. In addition, even when the voltage of one of the processor cores varies, the variation in the voltage does not affect the other processor core, and thus malfunctioning does not occur.

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

The invention discloses a crane automatic locking hook. The hook comprises a suspension ring, an automatic locking device, a micro motor, an arc lock pin, and a hook body; the top of the automatic locking device is connected to the suspension ring; the bottom of the automatic locking device is connected to the hook body; the tail part of the hook body is provided with a hook tip; a pressure sensor is arranged in the bottom of the side face of the hook body, and is connected to a micro controller in a wireless mode; the micro controller is arranged in the automatic locking device and is provided with an arc sliding chute; the end part of the arc sliding chute is communicated with a locking chute hole, the arc lock pin is arranged in the arc sliding chute, the end part of the arc lock pin is provided with a limit stop, the tail end of the limit stop is connected to a reset spring, the upper end face of the arc lock pin is provided with a rack, and the micro motor is arranged on the arc sliding chute that is closed to the locking chute hole end. The crane automatic locking hook has the advantages that the arc lock pin can be automatically locked, the automation degree is high, the locking is firm, the effect of unhooking is good, and the safety and stability of hook application are enhanced.

A method and an apparatus for decoupling output power of an inverter are provided. The method comprises: obtaining voltage amplitude instruction E* and voltage phase instruction θ* according to an output voltage and an output current of the inverter; obtaining an amplitude feedforward amount E_ff and a phase feedforward amount δ_ff according to an amplitude U of a grid voltage of the power grid, an amplitude E of the output voltage of the inverter, and a phase difference δ between the output voltage of the inverter_[0] and the grid voltage; obtaining a reference voltage amplitude E_ref according to the voltage amplitude instruction E* and the amplitude feedforward amount E_ff, and obtaining a reference voltage phase θ_ref according to the voltage phase instruction θ* and the phase feedforward amount δ_ff; and regulating the output power of the inverter using the reference voltage amplitude E_ref and the reference voltage phase θ_ref.

The invention discloses a six-degree of freedom micropositioner capable of isolating external vibration. The micropositioner comprises a motor sheet support, a level drive module, a wafer supporting stage, an air foot, a leveling focusing module and a plurality of gravity compensators; wherein the level drive module is arranged on the motor sheet support; moreover, the level drive module is connected with the wafer supporting stage to drive the wafer supporting stage to move in horizontal direction; the air foot is arranged at the bottom of the entire micropositioner to support the motor sheet support and the gravity compensators; the gravity compensators is used to support the leveling focusing module; the wafer supporting stage floats on the leveling focusing module by means of an airfloated structure; the horizontal and vertical uncoupling of the micropositioner is realized by the leveling focusing module and the airfloated structure of the wafer supporting stage. With high controllability, the micropositioner can realize high-speed and high-precision locating and can isolate vibration.

The invention discloses an antenna system and belongs to the field of antennas. The antenna system comprises a grounding plate, at least one group of antenna pairs arranged on the grounding plate, anda decoupling assembly arranged on the radiating surfaces of the antenna pairs, wherein each antenna pair comprises a first antenna and a second antenna; the decoupling assembly has electric anisotropy and the electric anisotropy means that components of equivalent dielectric constants of the decoupling assembly in various directions are different; and the decoupling assembly is used for adjustingthe antenna radiation directions of the first antennas and the second antennas, wherein the isolation of the first antennas and the second antennas after adjustment is greater than that of the firstantennas and the second antennas before adjustment. According to the antenna system, the problem that the effect of reducing coupling between the antennas by using slots is poor due to the fact that amobile terminal comprises a plurality of electronic components and the slots are easily affected by peripheral electronic components is solved; and the effect of improving the isolation between the antennas and the antenna radiation efficiency is achieved through changing the antenna radiation directions of the antennas by using the decoupling assembly arranged on the radiating surfaces of the antenna pairs is achieved.

The invention discloses a MIMO antenna array using an electromagnetic meta-surface covering layer. The MIMO antenna array comprises a meta-surface covering layer and an antenna array layer. The meta-surface covering layer comprises an upper covering layer and a meta-surface dielectric layer. The antenna array layer comprises a metal patch layer, an antenna dielectric layer and a metal floor layer.The antenna dielectric layer is arranged between the metal patch layer and the metal floor layer. An air layer is arranged between the meta-surface covering layer and the antenna array layer, and themeta-material covering layer and the antenna array layer are separated by a support structure. The upper covering layer comprises 20 basic units periodically arranged in 4 rows and 5 columns. The metal patch layer comprises two patch cells of the same size arranged on the E-plane or the H-plane. The array having quite close spacing between elements can be decoupled and the E-plane and H-plane coupled antenna array can be greatly decoupled and processing is easy.

The invention provides a high-temperature-resistant and multi-principal-phase high-abundance rare-earth permanent magnet material and a preparation method thereof; the method comprises the steps of expanding and doping a sintered state high-abundance rare-earth permanent magnet material with a low-melting-point eutectic alloy without heavy rare earths Dy and Tb through a grain boundary diffusion technology. By expanding and doping the low-melting-point eutectic alloy without heavy rare earths Dy and Tb through the grain boundary diffusion technology, the comprehensive magnetic property and thehigh-temperature resistance of the multi-principal-phase high-abundance rare-earth permanent magnet material are improved.

An integrated multilayer chip capacitor module including: plurality of multilayer chip capacitors arranged close to one another and co-planar with one another; and a capacitor support accommodating the multilayer chip capacitors, wherein each of the multilayer chip capacitors includes a rectangular parallelepiped capacitor body and a plurality of first and second external electrodes formed on at least two sides of the capacitor body, and the external electrodes on adjacent sides of adjacent ones of the multilayer chip capacitor in the capacitor support are electrically connected to each other by a conductive adhesive material.

The invention discloses a knee joint radio-frequency (RF) coil in a horizontal-field magnetic resonance system. The knee joint RF coil comprises a plurality of antenna units, wherein the number of the antenna units is greater than two, the antenna units are divided into an upper half part and a lower half part which can be separated from each other, and adjacent antenna units are partially overlapped. The knee joint RF coil in the horizontal-field magnetic resonance system, disclosed by the invention, has the advantages that the manner of connection between the upper half part and the lower half part is excellent, the quality of connection is more reliable, the decoupling effect, the sensitivity (signal-to-noise ratio) and the uniformity among the antenna units of the coil are improved, the PAT (Parallel Acquisition Technique) selectivity is flexible, and the PAT effect is excellent.

The invention discloses a novel power factor correction device, comprising an AC (alternating current) source, a rectifier bridge circuit, a Boost circuit, a decoupling circuit, a load and a control circuit, wherein the output end of the AC (alternating current) source is connected to the input end of a rectifier bridge, a signal is converted into steamed bun waves after being processed by the rectifier bridge circuit and serves as the input end of the Boost circuit, the output end of the Boost circuit is connected with the load, the decoupling circuit is connected in parallel with the front end of an output capacitor Co of the Boost circuit, and the control circuit outputs the signal to the decoupling circuit. According to the scheme of the invention, the ripple power in an AC/DC power conversion device or a DC/AC power conversion device is transferred to a decoupling capacitor, and thus the limitation of DC bus voltage ripples can be broken; and a feedforward control strategy is adopted, and the compensation effect of a bidirectional Buck/Boost power decoupling circuit can be greatly improved. Based on the above advantages, a compensation circuit is added to a conventional powerfactor correction circuit, and thus the capacitance value of the output capacitor can be reduced, and the power factor correction of non-polarized electrolytic capacitors can be realized.

The invention discloses a carotid artery coil. The carotid artery coil comprises coil units, and is characterized in that at least three coil units in the coil units are arranged in parallel. Three parallel coil units in the coil have a good balance between the SNR (signal to noise ratio) and the penetrating power. A saddle-shaped (or 8-shaped) coil unit can be added in the coil so as to effectively increase the image SNR and uniformity of the coil without influencing other units. The SNR, uniformity and IPAT (information processing aptitude test) effect of the carotid artery coil are obviously superior to those of the existing two-channel coil in commerce.

The invention provides a high isolation dual polarization decoupling anti-interference antenna array. The two sides of a lower layer dielectric substrate are coated with copper; a lower layer feed network consists of a 180-degree power division phase-shift network and a zero-phase feeder, and the input end is connected to radio frequency cables; a single side of an upper layer dielectric substrateis coated with the copper, and the upper surface is an upper layer radiation patch; one ends of feed probes are welded with three output ports of the lower layer feed network of the lower layer dielectric substrate, and the other ends of the feed probes are welded with the upper layer radiation patch of the upper layer dielectric substrate; two dual polarized antenna array elements and multiple dielectric wave absorbers are fixed on an antenna base plate; and the multiple dielectric wave absorbers are equidistantly distributed on the two sides which take the center connecting line of the twodual polarized antenna array elements as an axis. Thus, good polarization isolation can be obtained; and abilities to resist interference in three different directions can be realized by adopting a space-time adaptive anti-interference algorithm, so that the size of an anti-interference antenna array surface can be greatly reduced, and the food electrical performance of the antenna array elementscan be guaranteed.

The invention discloses an efficient filtering trap oscillator, which comprises a guide sheet, an oscillator radiation sheet with a filtering characteristic, a feed balun and an oscillator support piece, wherein the guide sheet is connected with the oscillator radiation sheet, and the guide sheet is used for converging antenna radiation energy and reducing beam width. According to the efficient filtering trap oscillator disclosed by the invention, through utilizing the dual-polarized oscillator radiation sheet, the feed balun and the like, the oscillator radiation sheet is provided with two mutually orthogonal plane printed cross-shaped full-wave slotted oscillators, the slotted oscillators can be multiplexed at two adjacent frequency bands by means of a duplexer, in addition, frequency decoupling can be realized, the decoupling performance of the antenna is integrally improved, and the efficient filtering trap oscillator has the advantages of being broadband, simple in structure, low in cost, convenient to process and the like.

The invention relates to a NdFeB permanent magnet material suitable for a magnetic suspension system and a preparation method thereof. This material is prepared by adoping of 0.5%-5.0%high entropy alloy in the main alloy of RExFe100-x-yBy, so that the alloy of the invention can realize demagnetization coupling through the high entropy alloy. Moreover, since the high entropy alloy doped in the material has a single solid solution nanostructure, the invention can also restrain the alloy grain growth in the sintering process through the high entropy alloy, refine the grain, make the alloy component structure more uniform and uniform, and effectively improve the comprehensive magnetic properties of the NdFeB permanent magnet material. The magnetic performance of the NdFeB permanent magnet material is improved, and further the strength and toughness, the vibration resistance and the corrosion resistance of the material are improved, so that the material is suitable for application environments such as magnetic levitation and the like, which have more restrictions on the working conditions.

A decoupling device for decoupling a high-frequency noise wave in a digital circuit is formed as a line device including a portion of a semiconductor substrate, an insulator film formed thereon as a gate oxide film, and an interconnect line formed thereon as a gate electrode. The line capacitance between the interconnect line and the semiconductor substrate is 100 pF or above, whereby the decoupling device effectively decouples the electromagnetic noise wave generated by a switching device in a frequency range between 10 and 1000 GHz.

Measures are described which contribute simply and reliably to the mechanical decoupling of a MEMS functional element from the structure of a MEMS element. The MEMS element includes at least one deflectable functional element, which is implemented in a layered structure on a MEMS substrate, so that a space exists between the layered structure and the MEMS substrate, at least in the area of the functional element. According to the invention, a stress decoupling structure is formed in the MEMS substrate in the form of a blind hole-like trench structure, which is open to the space between the layered structure and the MEMS substrate and extends into the MEMS substrate to only a predefined depth, so that the rear side of the MEMS substrate is closed, at least in the area of the trench structure.

A coplane air floatation orthogonal decoupling and air floatation ball bearing angle decoupling magnetic levitation vibration isolator belongs to the technical field of precision vibration isolation. Lubrication and supporting between a sleeve of a vibration isolator main body and a lower installation plate and between a piston cylinder and the sleeve are carried out through a magnetic levitation thrust bearing and a static pressure air floatation face respectively, freedom of horizontal rectilinear motion between an upper installation plate and the lower installation plate is decoupled through a coplane orthogonal air floatation guide rail, freedom of angular motion between the upper installation plate and the lower installation plate is decoupled through an air floatation ball bearing, a position closed loop feedback control system is formed by a voice coil motor, a displacement sensor, a limit switch, a controller and a driver, and relative locations of the upper installation plate and the lower installation plate are accurately controlled. The vibration isolator has characteristics of zero three-dimensional stiffness, high positional accuracy and rectilinear motion freedom and angular motion freedom decoupling, and can effectively solve high-performance vibration isolation problems of ultra-precise measurement device and processing equipment, in particular to a step scanning photoetching machine.

The invention discloses a magnet fabrication method for reducing dysprosium content. The magnet fabrication method comprises the following steps of firstly, fabricating an Nd-Fe-B casting piece, and then fabricating micro-scale Nd-Fe-B powder; secondly, performing compression moulding on the obtained powder; thirdly, spraying a layer of metal dysprosium on the surface of a press blank by a thermal spraying device after compression, wherein the dysprosium dosage accounts for 2-3%; fourthly, adjusting nozzle pressure of thermal spraying, spraying distance and spraying travelling speed so that the coating thickness reaches 50-150 micrometers; and finally, placing the press blank subjected to thermal spraying coating in a tubular sintering furnace for sintering, cooling the press blank, and taking out the press blank when a temperature reaches a room temperature. By the magnet fabrication method, the coercivity is ensured, and meanwhile, the addition amount of Dy element is reduced; compared with the current process, the magnet fabrication method has the advantages that the dysprosium content is reduced by 2%; and a magnet can be applied to fields such as small and special electrical machines and sensors.

The invention discloses a dual-polarization high-isolation antenna array and communication equipment. The dual-polarization high-isolation antenna array comprises an upper layer dielectric substrate, a lower layer dielectric substrate and a metal floor, wherein the metal floor is arranged between the two layers of dielectric substrates, the upper surface of the upper layer dielectric substrate is provided with N*M antenna sub-arrays, each antenna sub-array comprises two antenna units, grounding metal branches are arranged between adjacent antenna sub-arrays and around the adjacent antenna sub-arrays, the lower dielectric substrate is provided with a metal power divider feed arm, and energy is coupled upwards through a U-shaped gap arranged on the metal floor. Reduction of coupling among all ports can be realized.

The invention provides a via hole design method for improving the capacitor decoupling effect, and relates to the technical field of circuit board design. The method comprises the steps of determining the position of the power input end, the position of the load end and the transmission path of a power source; determining the pin of a load needing to be decoupled and finding out the suitable placement position of a capacitor according to the position of the pin and the wiring space, wherein it is guaranteed that the current-returning path of the capacitor and the pin in the process is the shortest; punching via holes of the capacitor in the middle or the two sides of the capacitor. Thus, the installation inductance parasitic effect of the capacitor is reduced, and the capacitor decoupling effect is greatly improved.

The invention relates to a hydraulically-driven shackle hook. The hydraulically-driven shackle hook comprises a hook body, a second bearing is mounted on the lower portion of a first bearing which is mounted at the top of the hook body, a bearing fixing device is connected with a hook fixing device which is connected with a hydraulic device fixing frame, a hydraulic device with a hydraulic cylinder is mounted on the hydraulic device fixing frame, and an electromagnetic valve is mounted on the hydraulic cylinder and connected with a storage battery and a wireless signal receiver. The hydraulic cylinder is connected with a connecting rod which is connected with a connection base, the hook fixing device is connected with a pulley block fixing frame, an anti-collision protective device is mounted at the top of the pulley block fixing frame, a pulley shaft is mounted on a pulley block which is mounted in the pulley block fixing frame, and the hook body is provided with an unhooking preventing protection device. The hydraulically-driven shackle hook has advantages of reasonable design, convenience in mounting and utilization, time saving, labor saving, high operation efficiency, realization of precision 90-degree rotation, effectiveness in rotation control, safety, reliability, wide application range and long service life.

The invention provides a magnetic resonance radio-frequency subsystem and a coil decoupling device and method thereof. The magnetic resonance radio-frequency subsystem comprises a body coil, a surfacecoil and a preamplifier, wherein the body coil and the surface coil are used for receiving magnetic resonance signals, and the preamplifier is used for amplifying the magnetic resonance signals received by the body coil. The coil decoupling device comprises a phase shifter which is connected between the preamplifier and the body coil and used for receiving an external voltage regulation signal toregulate the working voltage, and the voltage regulation signal is determined according to the weight of a current patient.

The invention relates to a self-balancing hook, which comprises a hook, an outer hook head is arranged on the top of the hook, an inner hook head is installed inside the outer hook head, a connection device is arranged on the top of the hook, and the connection device There is a connecting hole inside the connecting hole, a bearing sleeve is installed inside the connecting hole, a second bearing is sleeved inside the bearing sleeve, the second bearing is connected with a connecting rod, the top of the connecting rod is installed with a first bearing, and the upper part of the first bearing is installed A fixing nut is installed, the connecting rod is connected with a pulley block fixing frame, a pulley block is installed inside the pulley block fixing frame, a pulley shaft is installed on the pulley block, an anti-dropping device is installed on the neck of the hook, and the anti-dropping device is provided with a fixed hoop, a fixed hold The hoop is connected with a return spring, and the return spring is connected with an anti-separation plate. The invention has the advantages of reasonable design, convenient installation and use, good anti-decoupling effect, self-balancing, high work efficiency, good balance effect, stable lifting, safety and reliability, and a wide range of applications. , the advantage of long service life.