37results about How to "Promote widening" patented technology

The invention provides an ultra-wideband antenna. The ultra-wideband antenna comprises a dielectric substrate, wherein a radiation unit, a feeding structure and a ground plane are printed on the dielectric substrate; the radiation unit is a forked chip; the feeding structure is a coplanar waveguide feeding structure; and the ground plane is a coplanar waveguide ground plane. The ultra-wideband antenna has a coplanar waveguide structure, so that a single planar printed antenna structure can be realized; the ultra-wideband antenna can be easily integrated with a microwave integrated circuit; the coplanar waveguide ground plane can serve as the ground plane of the whole antenna, and particularly for the coplanar waveguide structure with a wideband slot structure, wideband work can be realized, and the electromagnetic interference of outside on the antenna can be effectively avoided; and wideband impedance bandwidth can be easily realized, and the efficiency of the antenna is improved, so that higher antenna gain can be achieved.

The invention relates to a high thermal conductivity interstitial interface material. The high thermal conductivity interstitial interface material is prepared from a component A and a component B, wherein the component A is prepared from a first main material and a first auxiliary material; the component B is prepared from a second main material and a second auxiliary material; a water absorbing material comprises ferrite. The high thermal conductivity interstitial interface material disclosed by the invention has the advantages that the wave absorbing material is added into the component A, and the component A is enabled to absorb or greatly reduce electromagnetic wave energy of surface, so that electromagnetic influence of an existing electrical element on people is avoided, and hazards of electromagnetic interference, electromagnetic pollution and information leakage are avoided; by means of vinyl silicone oil and thermal conductive filler, a produced gasket has low stress and good pressure absorptivity; on the premise of maintaining high thermal conductivity of the high thermal conductivity interstitial interface material, the stress to the device is greatly reduced; the high thermal conductivity interstitial interface material can adaptively fill various complex spaces; damages to a chip due to pressure in a smaller clearance are effectively avoided; besides, the invention provides a preparation method of the high thermal conductivity interstitial interface material. The preparation method comprises the following steps: preparing the component A, preparing the component B and carrying out vulcanization molding.

The purpose of the present invention is to provide a ring-shaped multi-notch ultra-wideband antenna, which is characterized in that it includes a dielectric substrate, a radiation unit, a coplanar waveguide ground plane, a coplanar waveguide feed signal strip line, a radiation unit, and a coplanar waveguide ground plane. , The coplanar waveguide feed signal strip lines are all fixed on the dielectric substrate, the coplanar waveguide feed signal strip lines are arranged under the radiation unit, there are two coplanar waveguide ground planes, and they are arranged on the coplanar waveguide feed signal strip lines sides. The invention not only facilitates the integration with the microwave integrated circuit, but also realizes the compact design of the system; adopts the coplanar waveguide feeding structure, which is convenient for broadening the impedance bandwidth; The design of the filter reduces the design cost and the complexity of the system, while improving the overall performance of the system and reducing the overall volume.

The invention provides a low-floor electric axle assembly. The low-floor electric axle assembly comprises an axle shell, hub motors, a planetary gear reduction gearbox, a wheel hub, braking systems, aC-shaped beam and a suspension system. The mechanical installation of the suspension system is compatible with a traditional axle. The layout form of the braking system, the hub motors and the planetary gear reduction gearbox can widen the width of a bus lane. According to the low-floor electric axle assembly, the motor is coaxially arranged on the axis of a wheel in a rim, the first-stage transmission of a cylindrical gear, a bevel gear or a hypoid gear is removed, the planetary gear reduction gearbox with a variable structure is adopted to ensure high transmission ratio and transmission efficiency, and the braking systems are arranged at both ends of the axle inside the motor, the space at both ends of the axle can be fully used to form the low-floor electric axle assembly.

The invention relates to the technical field of fiber spreading in fiber weaving production, in particular to a fiber spreading device for woven carbon fiber one-way cloth. The device comprises a pre-heating fiber spreading roller, a prismatic fiber spreading roller and a traction roller; the surface part of the pre-heating fiber spreading roller winds passing yarn and heats the yarn; the prismatic fiber spreading roller is rotatably arranged, the surface part of the prismatic fiber spreading roller winds passing yarn, and the rotary surface of the prismatic fiber spreading roller is set to have elevation difference to change the distance between the yarn passing through the surface of the prismatic fiber spreading roller and a rotary axis center of the prismatic fiber spreading roller; the traction roller is a driving roller, and provides traction power for the yarn passing through the pre-heating fiber spreading roller and the prismatic fiber spreading roller. According to the fiberspreading device, by arranging the fiber spreading roller to be of a prismatic structure, vibration motors in the prior art are replaced, when the prismatic fiber spreading roller rotates, the position of the yarn on the prismatic fiber spreading roller is changed periodically, by means of the principle, the yarn also vibrates at a certain frequency, the vibration only occurs to the yarn, and cannot influence the whole device, and meanwhile, the effects of widening, thinning and flattening the yarn during spreading are better.

The invention discloses a wide spectrum infrared sensor based on piezoelectric effect and composite plasmon, relates to the technical field of infrared sensing, and solves the problems of low absorption rate and limited wide-band absorption bandwidth in the prior art; the wide spectrum infrared sensor comprises a read-out integrated circuit substrate, a micro-electromechanical resonator, a dielectric layer and a metal array layer, and the read-out integrated circuit substrate, the micro-electromechanical resonator, the dielectric layer and the metal array layer are sequentially connected, wherein the metal array layer comprises a plurality of metal units, and each metal unit comprises at least three metal blocks with different sizes. According to the uncooled infrared sensor, a medium layer and the metal array layer are integrated on the surface of the FBAR, so that the enhanced absorption of the infrared spectrum by the uncooled infrared sensor is achieved, the absorption rate is improved from 20% to more than 80%; meanwhile, the wide-band absorption is achieved, the manufacturing is simple and the sensing performance of the infrared sensor is excellent; the FBAR and the like areintegrated on the read-out integrated circuit substrate, so that the integrated readout circuit can be integrally manufactured and produced in batch, and the cost is low; the sensor not only has the advantages of the traditional uncooled infrared sensor, but also has quick response and high sensing sensitivity.

The present invention discloses a junction termination structure of a thyristor chip, and the problems of low forward voltage withstand value and large leakage current of a chip in an existing thyristor single-face trench are solved. Two inner walls of the voltage groove in the thyristor single-face trench are symmetrically provided with stepped structures. The voltage trench is provided with two-stage stepped structures or three-stage stepped structures, the height is larger than a P2N junction, and the structures extend into an N area for 20um to 70 um. The junction termination structure is suitable for the semiconductor chip production field of all table top structures.

The invention discloses an AMC-based low-profile circularly-polarized cross dipole antenna and communication equipment. The AMC-based low-profile circularly-polarized cross dipole antenna comprises anupper dielectric substrate, a lower dielectric substrate, a main radiation unit, a parasitic unit, an AMC metasurface and a reflection floor, wherein the upper dielectric substrate and the lower dielectric substrate are arranged in parallel at a certain interval; the main radiation unit and the parasitic unit are arranged on the upper dielectric substrate; the upper surface of the lower dielectric substrate is provided with the AMC metasurface, and the lower surface of the lower dielectric substrate is provided with the reflection floor; and the main radiation unit comprises two pairs of dipoles, the two pairs of dipoles are of a cross-shaped cross structure, and a cross point is located at the center point of the upper dielectric substrate. The antenna has the characteristics of good circular polarization radiation performance, low profile and high gain, and can cover a part of C frequency bands of satellite communication.

The invention discloses an optical fiber wavelength division multiplexing device and an annular cavity optical fiber laser containing same. The optical fiber wavelength division multiplexing device comprises a double-tail fiber collimating lens, wherein a fiber wavelength division multiplexing membrane is fixed on one end face of the double-tail fiber collimating lens or a membrane which can be used for realizing the wavelength division multiplexing is plated on one end face of the double-tail fiber collimating lens. By using the optical fiber wavelength division multiplexing device and the annular cavity optical fiber laser containing the same provided by the invention, the loss and instability caused by the space coupling can be avoided while the optical fiber length of the optical fiber laser is reduced and the repetition rate is increased, thereby increasing the resolution ratio when used as the frequency comb of a light source.

The invention discloses a multi-core multi-rare earth doped ultra-wideband optical comb light source. The optical comb light source is composed of a single-mode optical fiber for outputting a comb-shaped light source, a wavelength add-drop multiplexer, a multimode pumping branch, a multimode coupler, a multi-core fan-in beam combiner, a multi-core multi-rare earth doped double-clad optical fiber and a multi-core fiber bragg grating, wherein an emission spectrum of the doped rare earth ions covers five bands of O, E, S, C and L. The emission spectrum is generated by the same rare earth ions doped in a fiber core of the multi-core optical fiber during pumping; and the light source is amplified by the fiber core rare earth ions again, so that the spectral gain and the signal-to-noise ratio are further enhanced due to spectral line competition, and the optical comb light source with ultra-wide band, high gain, high signal-to-noise ratio and uniform density interval is obtained.

The invention provides an analysis method for a volatile organic compound in pleural effusion. The method comprises the steps of headspace solid phase microextraction, cold trap focusing and gas chromatographic and mass spectrometry combination. The method with the combination of the cold trap focusing and gas chromatographic and mass spectrometry combination on the basis of the headspace solid phase microextraction technology can rapidly and accurately analyze the volatile organic compound in the pleural effusion. According to the analysis method, extraction, enrichment and sample introduction are integrated into headspace solid phase microextraction, operation is easy and convenient, no complex pretreatment process is needed, complex matrix interference of biological samples is eliminated, and component information distortion in samples is not caused; due to the cold trap focusing technology, the high-volatility organic compound in the pleural effusion is condensed and secondarily analyzed at low temperature and effectively separated on the proper chromatographic condition. According to the analysis method, the volatile organic compound in the pleural effusion can be rapidly detected, quanlitative and semi-quantitative analysis is performed, and the analysis method is of great importance in distinguishing benign and malignant pleural effusion and even screening lung cancer markers by applying difference analysis.

The invention discloses to a method for preparing a wide-band uncooled infrared detector based on FBAR, relates to the technical field of infrared detection, and solves the problems that the absorption rate of the infrared detector prepared by the method is low and the absorption bandwidth of a wide band is limited. The method includes the steps of preparing the FBAR; preparing a dielectric layerand a metal array layer on the FBAR; preparing a readout integrated circuit substrate; connecting the readout integrated circuit substrate and the FBAR, wherein the metal array layer comprises a plurality of metal cells, and each metal cell is composed of at least three metal blocks of different sizes. The method has the advantages of integrated manufacturing, mass production, low cost and the like; by integrating the dielectric layer and the metal array layer on the surface of the FBAR, the enhanced absorption of the infrared spectrum by the uncooled infrared detector is achieved, the broadband absorption is achieved, the fabrication is simple, and the infrared detector has excellent detection performance; the prepared detector has the advantages of traditional uncooled infrared detection, and has fast response and high detection sensitivity.

The invention relates to a wedge groove curvature sealing structure for dynamic and static gaps for a nuclear main pump. A static component of a nuclear main pump is provided with a sealing ring; the inner surface of the sealing ring is provided with a curvature sealing groove; the sealing groove is arranged at the inner surface of the sealing ring according to the opposite direction of the rotation of a rotor; a rotary component rotates to drive a fluid to rotate; and a working medium enters the curvature sealing groove, flowing which is opposite to the direction of a leakage flow is formed, the fluid forms the pressure resistance at the inlet of the sealing groove to block the leakage flow. The nuclear main pump provided by the invention is used under the condition of a high-pressure high-temperature high-speed large flow rate working condition, leakage flow rate can be controlled steadily and temporarily under a backflow extreme working condition, and is safe, durable and has a good leakage control effect.

The invention discloses an ultra-wideband high-gain multi-core optical fiber light source. A plurality of multimode pump lasers are adopted to generate a wide-spectrum spontaneous radiation spectrum in a plurality of doped multi-core double-clad optical fibers, then beam combination and tapering coupling are carried out, and finally, the whole high-brightness and ultra-wideband spectrum is outputthrough one optical fiber. Integrated parallel amplification is achieved through the multi-core multi-doped optical fiber, and finally the low-divergence optical fiber light source which is high in brightness, ultra-wide in band and flat in spectral line is obtained.

The invention relates to a large-volume sample injection-variable temperature focusing supercritical fluid chromatography mass spectrometry analysis system. The system comprises a modifier pump, a carbon dioxide pump, a mixer, an automatic sample injector, a six-way valve for switching flow paths, a quantitative loop, a column oven, a trace preheater, a chromatographic column, a supplement pump, a three-way connector, a back pressure regulator, a mass spectrum detector and a connecting pipeline for connecting all the components, wherein the mixer, the trace preheater and the chromatographic column are arranged in the column oven. The invention also relates to an analysis method using the system. The analysis method comprises the following steps of (1) changing temperature; (2) loading a sample by an automatic sample injector; (3) performing large-volume sample injection-column head focusing; and (4) performing chromatographic separation and mass spectrometry. According to the method, a problem of solvent incompatibility in supercritical fluid chromatography is solved, so a problem of chromatographic peak broadening caused by large-volume sample introduction is avoided, the chromatographic peak shape of a compound is improved, and analysis sensitivity is improved.

The invention relates to an LBJT (lateral bipolar transistor) containing a field plate structure. The LBJT comprises a substrate, a buffer region, a collector region, a base region and an emitter region which are arranged from bottom to top, wherein ohmic contact regions are formed on the upper edges of the collector region and the base region in an ion implantation manner; metal electrodes are respectively formed in the collector region, the base region and the emitter region in a metal deposition manner; an emitting electrode is positioned in the emitter region; a collector electrode is positioned in the ohmic contact region of the collector region; a base electrode is positioned in the ohmic contact region of the base region. The LBJT is characterized in that oxidation layers are arranged on the exteriors of the collector region, the base region and the emitter region; at least one of the base region, the collector region and the emitter region is provided with a field plate. According to the invention, the field plate structure is adopted to enhance the depletion of a drift region so as to reduce the peak electric field in the drift region; thus, a higher blocking voltage can be born under the condition of the same length of the drift region, and the voltage blocking grade of the device is remarkably increased.

The invention discloses a carbon fiber take-up machine yarn guiding device which comprises a supporting plate, a rotatable adjusting base is arranged above the front face of the supporting plate in a penetrating mode, sliding through grooves are formed in the two sides of the adjusting base, the two sliding through grooves are formed in the surfaces of the sliding through grooves, and sliding rods are arranged in the sliding through grooves. By means of the connecting sleeves on the sliding rods, when the threaded sleeves rotate, the two threaded rods rotate towards the interiors of the threaded sleeves, so that the two sliding rods are driven to rotate in the sliding through grooves, the positions of the two upper godets can be adjusted through the structure, it is guaranteed that the upper godets make contact with carbon fibers in the working process, and therefore the carbon fibers are prevented from being damaged. Through the structure, the practicability can be improved.