43results about How to "Increase electrical size" patented technology

The invention discloses an electromagnetic scattering simulation method based on parallel moment method and physical optics mixing to mainly solve the problem that when electrically large models are processed in the prior art, the simulation efficiency of electromagnetic scattering and the precision are low. The electromagnetic scattering simulation method comprises the steps that a rough surface power spectrum and rough surface parameters are input, and a rough surface is simulated based on the Monte Carlo method; geometric modeling is carried out on a radar target through 3dsMax software, and the subdivided radar target is output; a combined model is formed by combining the rough surface and the radar target, the rough surface is divided into a physical optics area, and the radar target is divided into a parallel moment method area; induced currents on the rough surface and induced currents on the surface of the radar target are obtained; a far scattered field of the combined model is calculated based on the induced currents on the surface of the combined model, a radar cross section of the combined model is obtained, and simulation between the rough surface and the combined electromagnetic scattering of the radar target is achieved. According to the electromagnetic scattering simulation method, the memory consumption is little, the simulation efficiency is high, and the electromagnetic scattering simulation method can be used in the study on the rough surface and the radar target combined electromagnetic scattering character in the field of national defense and the civil using.

An electric motor includes a rotor shaft arranged in a casing and having an axial hollow bore formed therethrough for passage of lubricating oil, a rotor, a stator, a pair of bearings each having an inner race and an outer race, a pair of bearing fixing parts supporting the rotation of the rotor shaft, and bearing cooling devices each having a cylindrical heat dissipation portion fixedly secured to the rotor shaft so as to be in contact with either one of end faces of the individual inner races, the heat dissipation portion extending from the one end face of each inner race to a side opposite to the bearings. A pair of spaces between rotor-side end faces of the bearings and the bearing fixing parts, respectively, are in communication with ring gaps between the heat dissipation portions and the rotor shaft, respectively, through radial communication holes in the rotor shaft.

A card edge connector assembly includes a circuit board, a connector, an electrical card and a fixing structure. The connector is formed on the circuit board, the front rim of the electrical card is inserted into the insertion slot of the connector. The fixing structure has an elastic element having a fixing portion positioned on the circuit board. Two relating opposing sides of the fixing portion extends two elastic arms whose free ends form a beveled edge and a clasp portion, and define positioning slots on the rear rim of the electrical card. The length of the elastic arm increases in such a way that the elasticity of the elastic arm becomes greater so as to prevent the elastic arm abrading and breaking to ensure the positioning function and enhance the shock-resistance.

A power transmission configured with a mechanical pump that generates and deliver a fluid pressure to a clutch. An electromagnetic pump generates and delivers a fluid pressure to the clutch, and an accumulator connects the clutch and the electromagnetic pump, and accumulates fluid pressure acting there between. A switching valve selectively switches between connecting the mechanical pump side and the clutch in a fluid communicating manner and connecting the electromagnetic pump and the clutch in a fluid communicating manner. A valve drive portion that drives the switching valve so as to connect the mechanical pump side and the clutch when the mechanical pump is driving, and drives the switching valve so as to connect the electromagnetic pump and the clutch when the electromagnetic pump is driving in place of the mechanical pump.

An electric motor includes a rotor shaft arranged in a casing and having an axial hollow bore formed therethrough for passage of lubricating oil, a rotor, a stator, a pair of bearings each having an inner race and an outer race, a pair of bearing fixing parts supporting the rotation of the rotor shaft, and bearing cooling devices each having a cylindrical heat dissipation portion fixedly secured to the rotor shaft so as to be in contact with either one of end faces of the individual inner races, the heat dissipation portion extending from the one end face of each inner race to a side opposite to the bearings. A pair of spaces between rotor-side end faces of the bearings and the bearing fixing parts, respectively, are in communication with ring gaps between the heat dissipation portions and the rotor shaft, respectively, through radial communication holes in the rotor shaft.

A card edge connector assembly includes a circuit board, a connector, an electrical card and a fixing structure. The connector is formed on the circuit board, the front rim of the electrical card is inserted into the insertion slot of the connector. The fixing structure has an elastic element having a fixing portion positioned on the circuit board. Two relating opposing sides of the fixing portion extends two elastic arms whose free ends form a beveled edge and a clasp portion, and define positioning slots on the rear rim of the electrical card. The length of the elastic arm increases in such a way that the elasticity of the elastic arm becomes greater so as to prevent the elastic arm abrading and breaking to ensure the positioning function and enhance the shock-resistance.

The invention provides a low-profile broadband circularly polarized antenna for 5G communication and a design method thereof and belong to the technical field of microwave passive devices and the antenna comprise an antenna radiation assembly, a reflector assembly and an antenna feed assembly. The antenna radiation assembly is used for signal radiation, and the reflector assembly is used for reflecting radiation signals of the antenna radiation assembly. The antenna radiation assembly comprises an upper layer microwave dielectric substrate and first and second irregular slotted rectangular patch antennas etched on the upper and lower surfaces of the upper layer microwave dielectric substrate. The reflector assembly comprises a lower layer microwave dielectric substrate and a plurality of AMC reflectors distributed on the upper surface of the lower layer microwave dielectric substrate at equal intervals. The AMC reflectors are loaded below the first irregular slotted rectangular patch antenna and the second irregular slotted rectangular patch antenna; and the antenna feed assembly provides feed for the first irregular slotted rectangular patch antenna and the second irregular slotted rectangular patch antenna. L-shaped grooves are respectively etched in the first irregular slotted rectangular patch antenna and the second irregular slotted rectangular patch antenna; and the antenna is low in profile and small in size, contains 5G, is compatible with a 4G frequency band, and is wide in bandwidth after being loaded with an artificial magnetic conductor.

A BBW type brake system which operates fluid pressure generators having electric motors as drive sources based on an electrical signal to brake a wheel, field weakening control of the electric motors is performed in the initial stage of operation of the fluid pressure generators to increase the rotational speed of the electric motors. Therefore, it is possible to reduce a time lag before the braking force actually generates after the electrical signal for operating the fluid pressure generators is outputted, thereby improving operational responsiveness. After the braking force actually generates, the field weakening control is cancelled to secure a required braking force with a sufficient torque.

A drive control device is provided with a determining section and a voltage increasing section. The determining section determines if the actual acceleration is deficient in comparison with the acceleration requested by the driver or if the generator output is deficient in comparison with the acceleration requested by the driver. The voltage increasing section increases the voltage supplied to the electric generator from a vehicle mounted electric power source when the determining section determines that the actual acceleration or the generator output is deficient. As a result, the generator output deficiency is eliminated and the required motor torque is produced, thereby enabling the vehicle to start into motion appropriately in accordance with the acceleration requested by the driver.

An antenna structure intended for small-sized mobile terminals. It comprises a main radiator (210) for implementing the lowest operating band and other radiators for implementing at least one operating band in the high band. The structure comprises also a matching circuit, by which a double resonance is implemented for the main radiator in the range of the lowest operating band and the isolation is improved between the main radiator and another radiator. A reactive element (L23) is joined to the main radiator so that its electric size decreases in the high band and increases in the low band. The former matter strengthens the resonances in the high band and thus results in rise in the efficiency in the high band.

An electrical connector includes a housing having a first sidewall surface and a second sidewall surface extending in a first direction in parallel to each other with a first distance therebetween; a first terminal having a first contact portion protruding from the first sidewall surface in a second direction substantially perpendicular to the first direction; a second terminal having a second contact portion protruding from the second sidewall surface; and an extension portion having a first external wall surface and a second external wall surface. The extension portion is arranged so that a center point between the first external wall surface and the second external wall surface is shifted with respect to a center point between the first contact portion and the second contact portion. The first external wall surface extends in parallel to the second external wall surface with a second distance larger than the first distance.

This invention relates to a device comprised of at least two interchangeable modules, wherein at least one module has a power source and / or data storage unit and can transmit power and / or data to all of the electrically and mechanically mated modules. The device is designed for use in extreme weather environments, such as but not limited to, snow, rain, at elevation, and / or under pressure. In addition, each mating point between the at least two modules is waterproof. In a preferred embodiment, the device is comprised of a first module that is an optical head, with at least two optical lenses and can sense and capture image data. A second module is a handle comprised of a battery. When the first and second modules are electrically and mechanically mated, the two modules are secure and waterproof and the device operates as a 360° optical camera with an interchangeable power handle module.

The invention discloses a two-dimensional millimeter wave circularly-polarized wide-angle scanning phased-array antenna, and relates to the technical field of millimeter wave antennas. According to the technical scheme, an antenna radiation patch is connected with a rectangular parasitic patch through a high impedance matching microstrip line which is provided with a cross-carved equal length in the center and is used for carrying out impedance matching on the antenna, and a windmill-shaped microstrip radiation patch excitation equal-amplitude in-phase polarization orthogonal degenerate mode is manufactured on the symmetric center of a diagonal bisector of the corner of the antenna radiation patch; feed probes penetrate through the antenna dielectric layer and are connected with the antenna radiation patch through the four rectangular parasitic patches, the four feed probes 4 of each antenna unit feed through rotary feed structures which are equal in amplitude and sequentially differ by 90 degrees, and the windmill-shaped microstrip radiation patch is connected with rectangular blocks of the four rectangular parasitic patches of the four metallized probes for feed. feeding in equal-amplitude excitation with the phase difference of 90 degrees is performed in sequence to form circular polarization radiation, and the antenna arrays are arranged in a rectangular manner at equal intervals according to unit intervals to form an antenna array surface.

An electric steering apparatus includes a brushless motor 3 which applies torque to a steering system through a speed reduction mechanism 4, and a resolver 7 which detects a rotation angle of the output shaft 31 of the brushless motor 3. The resolver 7 is arranged between the brushless motor 3 and the speed reduction mechanism 4 in a manner separately from the body 32 of the brushless motor 3.

A monopole antenna applicable especially to small mobile stations. The radiator (331) of the antenna is trough-like so that it covers the head surface, front and rear surfaces and both side surfaces of the dielectric cover (310) of the radio device at an end of the device. On the side of the side surfaces there are slots (SL1, SL2) in the radiator starting from its edge for increasing the electric size. The radiator is fed electromagnetically by a separate element (320) which is shaped so that the antenna has at least two operating bands. The ground plane of the antenna is apart from the radiator, thus not extending inside the 'trough'.

Featured is a resistance heater air heating device that includes a low thermal conductivity enclosure and an electric resistance heater that is disposed within such an enclosure. In more particular embodiments, such an enclosure is configured so as to provide a high surface area which in combination with the heater heats the air passing through the enclosure. In more particular embodiments, the ceramic enclosure is configured and arranged so as to include a through aperture in which is disposed the electric resistance heater and through which the air flows along the length of the through aperture.

The present invention is directed to a ground moving target (GMTI) radar that can detect targets, including dismounts, with very small minimum detectable velocities by combining signals from antennas on different spatially separated platforms in a main beam clutter-suppressing spatially adaptive process without requiring that the relative positions of the antenna phase centers be accurately tracked. The clutter nulling is in addition to that provided by the Doppler filters. The spatial displacement provides a narrow main beam clutter null reducing undesired target suppression. The clutter-suppressing spatially adaptive structure is used in both the sum and delta channels of the monopulse processor so that the beam distortion caused by the spatial nulling is compensated for, and the monopulse look-up process is preserved to maintain angle accuracy. Noncoherent integration is employed to recover signal to noise loss resulting from the uncertain relative locations of the platforms.

The invention relates to a fractal yagi printed antenna of coplanar waveguide feed, which relates to a yagi printed antenna, and in particular to a fractal yagi printed antenna of coplanar waveguide feed. The invention aims at solving at solving the problems of the miniaturization and mass production of the antenna and the integration of a communication circuit caused by the large and complicated size of a guide antenna. The fractal yagi printed antenna is characterized in that a first printed metal floor board and a second printed metal floor board are arranged on the lower part of one side surface of a medium plate in a linear way, a guide device, an active vibrator and a reflector are sequentially installed on one side surface of the medium plate from left to right, both a left arm and a right arm on the lower part of the active vibrator are arranged between the first printed metal floor board and the second printed metal floor board, the lower part of the guide device is connected with the first printed metal floor board into a whole, the lower part of the reflector is connected with the second printed metal floor board into a whole, and a coplanar waveguide feed port is arranged between the first printed metal floor board and the second printed metal floor board. The fractal yagi printed antenna is used for the technical field of radio.

The invention relates to the technical field of communication and discloses an unbroken metal frame antenna comprising a metal frame, a metal grounding plate, an antenna feed point, a first antenna branch, a second antenna branch, and an antenna matching module. The metal frame is provided with a first grounding terminal and a second grounding terminal which are both connected with the metal grounding plate so that a part of the metal frame and the metal grounding plate form a closed metal rectangular ring structure. The antenna feed point, the first antenna branch, and the second antenna branch are disposed on the metal frame and in the metal rectangular ring structure, wherein the antenna feed point is arranged between the first antenna branch and the second antenna branch. The antenna matching module is arranged in the metal rectangular ring structure for adjusting the high and low frequency bandwidth of the antenna. Thus, the appearance of a cell phone can meet the needs of a user, and can reduce the influence of holding the cell phone with a hand on the antenna performance, thereby improving the antenna performance under a holding state and improving call quality.

A power transmission configured with a mechanical pump that generates and deliver a fluid pressure to a clutch. An electromagnetic pump generates and delivers a fluid pressure to the clutch, and an accumulator connects the clutch and the electromagnetic pump, and accumulates fluid pressure acting there between. A switching valve selectively switches between connecting the mechanical pump side and the clutch in a fluid communicating manner and connecting the electromagnetic pump and the clutch in a fluid communicating manner. A valve drive portion that drives the switching valve so as to connect the mechanical pump side and the clutch when the mechanical pump is driving, and drives the switching valve so as to connect the electromagnetic pump and the clutch when the electromagnetic pump is driving in place of the mechanical pump.

A design method for designing a multi-path amplifier involves connecting an amplifier stage having at least two amplifier branches to a combiner stage; feeding a plurality of testing signals with one or more of a plurality of sweeping variables to the amplifier stage; measuring output signals at the output of the combiner stage depending on the plurality of testing signals; designing a structure of an input network stage for the amplifier stage on the basis of the measured output signals; and combining the designed input network stage with the amplifier stage to create an efficiency-optimised multi-path amplifier.

To be capable of easily avoiding lengthening and heightening with a simple configuration even in a case where relatively large electric power is supplied.Provided is a configuration in which the conductor resistance of a plurality of contact members 13 and 14 is reduced in accordance with an increment in thickness and energization allowable electric power is increased by one of more of the contact members 13 and 14 being formed thicker than the rest so that an increase in the size of an electric connector such as lengthening and heightening is prevented even in a case where the supply electric power with respect to the electric connector is large and the retention of a flat plate-shaped signal transmission medium F is enhanced by contact portions of the thickness-increased contact members 13 and 14 being pressure-welded to the flat plate-shaped signal transmission medium F.

A method is for manufacturing a solar cell having a plurality of unit cells connected in series, each of the unit cells including a substrate, a first electrode layer formed on the substrate, a semiconductor layer formed on the first electrode layer, and a second electrode layer formed on the semiconductor layer. The method includes forming a fluid-repellent partition portion on the substrate to partition a plurality of regions respectively corresponding to the first electrode layers of the unit cells, and applying a liquid material including a first electrode material for forming the first electrode layers on the regions of the substrate that are partitioned by the partition portion, and baking the applied liquid material to form the first electrode layers.

The invention discloses an ultrahigh-frequency RFID anti-metal tag antenna based on a microstrip structure. The antenna comprises a dielectric substrate and a radiation module arranged on the dielectric substrate, the dielectric substrate is a rectangular plate, and the radiation module is realized by adopting the microstrip structure. The radiation module comprises a radio frequency chip, a metal layer, a first rectangular groove, a second rectangular groove, a third rectangular groove, a first radiation unit and a second radiation unit, the first radiation unit and the second radiation unit are respectively composed of eight rectangular metal blocks, and the first radiation unit and the second radiation unit form a symmetrical oscillator antenna structure; and the first radiation unit and the second radiation unit form a U-shaped groove communicated with the first rectangular groove and the third rectangular groove, and a gap formed between the first radiation unit and the second radiation unit and a gap in the first radiation unit and the second radiation unit form an impedance adjusting structure. The antenna has the advantages of being long in reading distance, high in gain, small in size, simple in processing technology, low in cost and wide in frequency band.

The invention discloses a built-in ultrahigh frequency sensor spread spectrum structure for GIS partial discharge detection, and belongs to the field of sensor frequency band bandwidth adjustment. The structure comprises a metal cover plate buckling on a GIS cavity and a built-in ultrahigh frequency sensor fixed at the inner side of the metal cover plate through height adjustable metal bolts, wherein the built-in ultrahigh frequency sensor comprises an antenna body and an impedance converter connected therewith; one end of the metal bolt is fixed in a non-conductive area of the antenna body, and the other end is connected with the metal cover plate; the metal cover plate and the GIS cavity are in conductive contact; and antenna conductive arms of the antenna body are respectively electrically connected with adjacent metal bolt. The structure provided by the invention has the advantage of effectively solving the problem of low-frequency lower-limit extension of the built-in ultrahigh frequency sensor under the condition that the dimensions of the antenna body and the impedance converter are not increased in a limited GIS internal space under GIS onsite complex conditions.

The invention discloses a reflecting plate based on an ultra-wide stopband frequency selective surface and belongs to the technical field of communication. The reflecting plate based on an ultra-wide stopband frequency selective surface is used for solving the problem of relatively narrow stopband of an existing reflecting plate, and comprises m*n frequency selective surface units (1) and a dielectric substrate (2), wherein the frequency selective surface units (1) are printed on the dielectric substrate (2) and periodically distributed along the X axis and the Y axis. Each frequency selective surface unit (1) is composed of a zigzag cross-shaped patch (3) in the middle of which a quadrilateral gap (5) is formed and four circular ring patches (4) of which the outer radiuses are reduced in an equal ratio; the four circular ring patches (4) are located directly between the every two adjacent arms of the zigzag cross-shaped patch (3), respectively, and distributed periodically in a clockwise or anticlockwise order. The reflecting plate based on the ultra-wide stopband frequency selective surface has the advantages of expanding the stopband width of the reflecting plate and realizing sharp drop of the two-end transmission coefficients of the stopband; the transmission of the electromagnetic waves of other frequency bands is guaranteed while the radiation characteristic of the ultra-wideband antenna is guaranteed; in short, the reflecting plate is applicable to an ultra-wideband directional radiating antenna.

A heat sink plate is mounted on an electronic device for heat radiation of the electronic device. When the fundamental wave or a harmonic wave of the clock signal of the electronic device is coincide with the size of the heat sink plate, the heat sink plate resonates and large clock signal harmonic wave noise is radiated. For suppressing the noise, a dielectric strip is mounted on an edge portion of the heat sink plate. By this dielectric strip, the resonance frequency of the heat sink plate varies so that the resonance can be suppressed.

A heat exhaust system for an on-aircraft electric generator, includes: a fuel pump which is driven by electric power generated by an electric generator installed in an aircraft, and which measures and supplies fuel to an engine of the aircraft; a first heat exchanger which releases heat generated by the electric generator into the fuel supplied to the engine; a fuel flow rate determiner which determines a flow rate of the fuel supplied to the engine by the fuel pump; an electric generator output determiner which determines an output from the electric generator; and a heat release controller which controls heat release at the first heat exchanger by using at least one of the flow rate of the fuel determined by the fuel flow rate determiner and the output determined by the electric generator output determiner as a control parameter.