63results about How to "Increase the withstand power" patented technology

The invention discloses a water-cooling microwave ablation needle-shaped antenna, which comprises an ABS (acrylonitrile butadiene styrene) protection handle and an antenna rod body, wherein the ABS protection handle is connected with the antenna rod body. The water-cooling microwave ablation needle-shaped antenna is characterized in that the inside of the ABS protection handle is provided with a water inlet and outlet cavity and a minitype radio frequency coaxial connector; a shell of the ABS protection handle is provided with a microwave output indicator light and a control push button; the antenna rod body comprises an outer thin-wall casing pipe; and the inside of the outer thin-wall casing pipe is provided with a needle-shaped radiator cover, a radiator, a small-diameter coaxial cable and a cooling water inlet pipe. Compared with the prior art, the water-cooling microwave ablation needle-shaped antenna disclosed by the invention has the advantages of ultra-thin diameter, high intensity, high efficiency, high tolerance power, big ablation and damage range and good form, and the foundation is laid for the further tumor ablation therapy.

The invention relates to the field of metal organic chemical vapor deposition equipment, and in particular to a radiant heating element, a radiant heater and an MOCVD reactor. The heating element is formed by winding of heating sheet in an axial symmetrical way, the section of the heating sheet is a special-shaped section, the radiant heater adopts the heating element with the special-shaped section, and the MOCVD reactor is made of the radiant heater. Under the condition of using radiation heating, the invention improves the structure and shape of the heating element to enhance bear power of the heating element. The matched high temperature MOCVD reactor solves the problem that the currently widely-used MOCVD reactor can not provide the high temperature conditions needed for epitaxial technology of high quality AlN and AlGaN growth.

The invention relates to an LED embedded lamp comprising a lamp body and an LED lamp installed in the lamp body, wherein optical lenses in one-to-one correspondence are covered on the LED lamp, and transparent glass and a lamp cover are sequentially arranged on the upper end face of the lamp body. A step which divides the lamp body into two hollow cavities containing the LED lamp and an electronicdriver respectively is arranged in the lamp body, the step face of the step is in a horizontal or inclined shape, the LED lamp is fixedly installed on the step face by an aluminium base plate, the bottom of the step is provided with a heat-radiation fin which is beneficial to heat radiation, the section of a port at the upper end face of the lamp body is in a superior arc shape, an air outlet hole which is communicated with the hollow cavities below the step is arranged on the upper end face of the lamp body, the upper part of the air outlet hole is exposed on the upper end face of the lamp body, the lamp cover is covered above the air outlet hole, the section of the transparent glass arranged at the upper end face of the lamp body is in a superior arc shape, and a waterproof washer withthe section in a superior arc shape is arranged between the upper end face of the lamp body and the transparent glass. The invention has strong heat-radiation capability and convenient installation, increases the bearing power greatly and enhances the waterproof capability.

The invention relates to a terahertz quasi-optical power combining and amplifying device and is applied to power combination and amplification of a terahertz frequency band. The device comprises a microwave transmission horn antenna, a dielectric lens A, a microwave amplification array chip, a terahertz frequency-doubling array chip, a dielectric lens B and a terahertz horn reception antenna. According to the focusing effect of the dielectric lens A, spherical electromagnetic wave signals input by the microwave transmission horn antenna are converted into plane wave signals which are transmitted to the microwave amplification array chip to realize amplification and output. Amplified microwave signals are transmitted to the terahertz frequency-doubling array chip to realize frequency doubling and output. The frequency-doubling terahertz signals combine into high-power signals through the dielectric lens B in the form of quasi-optical wave beams, thereby realizing coupling and matching with the terahertz horn reception antenna. The high-power terahertz signals can be outputted by adopting a quasi-optical power combining structure, thus the terahertz quasi-optical power combining and amplifying device is simple in structure and convenient to debug.

The invention provides a technical scheme about a high-power optical fiber pumping beam combiner and a packaging method of the high-power optical fiber pumping beam combiner. According to the method, the input end and the output end of an optical fiber waveguide structure are skillfully coated with two lines of UV adhesive high in refractive index, wherein the optical fiber waveguide structure is obtained after tapering shaping is carried out and comprises N input pumping optical fibers, a taper area, a welding point and an output optical fiber, so that the optical fiber waveguide structure is fixed to an aluminum substrate with grooves, and an aluminum upper cover the same as the grooves of the aluminum substrate in structure is used for adhesive dispensing sealing to complete packaging of the pumping beam combiner. The packaged pumping beam combiner is simple in structure, the heat accumulation phenomenon is not obvious, the heat dissipating effect is good, the device is not prone to damage, and the tolerance power can reach the magnitude from kW to multiple kW.

The invention discloses a coupling dispensing system and a coupling dispensing method. An automatic coupling device of the coupling dispensing system is used for coupling a device to be coupled and anoptical fiber and comprises an adjusting mechanism and a clamping mechanism, wherein the clamping mechanism is arranged on the adjusting mechanism and comprises a sliding table and an elastic piece,one end of the elastic piece is connected with the sliding table, and the clamping mechanism is used for clamping the optical fiber; and the adjusting mechanism is used for adjusting the posture of the clamping mechanism so that the end face of the optical fiber is parallel to the end face of the device to be coupled. The automatic coupling device can enable the end face of the optical fiber to beparallel to the end face of a device to be coupled, and the consistency is good. The dispensing device of the coupling dispensing system is used for dispensing in the lateral direction on the end faces of the optical fiber and the device to be coupled, so that no glue is arranged on the light passing surfaces of the optical fiber and the device to be coupled, heat energy generated when light passes through the coupling glue is reduced, and the bearing power of the device can be improved.

The invention discloses a composite glass fiber containing a chalcogenide glass fiber core and a preparation method thereof. The fiber core of the composite glass fiber is a coaxial dual core consisting of a first fiber core and a second fiber core. The first fiber core is a chalcogenide glass fiber core, and the second fiber core is a germanium-doped quartz glass fiber core having an annular cross section. The second fiber core surrounds the first fiber core to compose the coaxial dual core. The diameter of the first fiber core is the same with the inner diameter of the second fiber core. A pure quartz glass cladding is arranged outside the second fiber core. The end face of the first fiber core and the end face of the second fiber core do not coincide on at least one side of the composite glass fiber. Chalcogenide glass with high nonlinear refractive index is integrated into a common fiber to get the composite glass fiber with a coaxial dual core. The chalcogenide glass can be in butt fusion with the common fiber with low loss, and the nonlinear performance of the quartz glass fiber can be enhanced by making full use of the high nonlinear refractive index of the chalcogenide glass.

The invention relates to a digital television transmitting antenna based on an E-shaped patch. The digital television transmitting antenna comprises a formation plate, the E-shaped patch, a rectangular parasitic patch, an input connector and a retaining screw, wherein the rectangular parasitic patch, the E-shaped patch and the formation plate are orderly arranged in parallel from top to bottom to form a main structure of a stacked antenna; the E-shaped patch is provided with two symmetric rectangular gaps, and the length of a middle wing is smaller than that of two sides; an outer conductor of the input connector is fixed on the formation plate, and an inner conductor of the input connector penetrates through the formation plate and is connected to the E-shaped patch to feed; the rectangular parasitic patch at the upper layer is coupled by the E-shaped patch to feed. The digital television transmitting antenna based on the E-shaped patch provided by the invention satisfies the use requirement of a terrestrial television broadcasting transmitting system by adopting a multi-resonator technology to improve the impedance bandwidth and power handling of antennas; the invention has the characteristics of being wide in working band, high in gain, small in input standing-wave ratio, high in power handling, simple in processing, convenient in debugging and the like, and is applicable to a terrestrial television transmitting antenna system of a decimeter wave band.

The invention provides an optical fiber stripper, a manufacturing method and package structure of the optical fiber stripper. The optical fiber stripper has the advantages such as high stripping efficiency, high withstand power, uniform temperature distribution, long service life, high stability and the like. The package structure of the optical fiber stripper is characterized in that: the opticalfiber stripper is placed in a glass tube to provide preliminary package protection for the optical fiber stripper; and then the glass tube is arranged in an accommodating cavity surrounded by a heatconducting cover plate and a heat conducting bottom plate to perform thermal conductive packaging on the optical fiber stripper; therefore, on one hand, the package structure is conveniently installedon a water-cooled plate of an external water-cooling device, the heat emitted by the optical fiber stripper is uniformly transmitted to the water-cooled plate, and then the heat is taken away by thewater-cooling device; on the other hand, the thermal conductive packaging of the optical fiber stripper can prevent the stripped light from leaking into an optical path module; therefore, the damage of the stripped light to the optical path is avoided, the stability and working efficiency of the optical fiber stripper is greatly improved, and the stability of an entire optical fiber laser system is maintained.

The invention discloses a single galvanometer total-reflection type displacement focusing 3D scanning optical system. The single galvanometer total-reflection type displacement focusing 3D scanning optical system comprises a convex-surface off-axis parabolic mirror, a concave ellipsoidal surface reflecting mirror and a plane reflection galvanometer. The single galvanometer total-reflection type displacement focusing 3D scanning optical system is novel in structural design, adopts the single galvanometer scanning scheme, and optimizes the number of galvanometers while 3D large-margin scanning is realized; during dual-axis rotation, laser reflectance is not affected by rotation around an incident optical axis, so that laser reflectance changes caused by a deflection angle of a light beam are improved; a total-reflection type metal optical lens can be directly subjected to water-cooling, and has good thermal conductive characteristics, so that power borne on the lens is greatly improved; and meanwhile, the single galvanometer total-reflection type displacement focusing 3D scanning optical system has relatively great focusing focal length, has different coating films according to types of the laser units through displacement compensation of a beam-expanding focusing module, and is especially suitable for 3D laser large-margin scanning processing application of kilowatt-level and myriawatt-level high-power laser units.

The invention provides a surface acoustic wave device. The surface acoustic wave device comprises a piezoelectric substrate; an IDT electrode provided on the piezoelectric substrate, the IDT electrode including: a first buffer layer provided on the piezoelectric substrate, the first buffer layer including metallic titanium, and the thickness of the first buffer layer being 0.5% lambda or less when lambda is a wavelength of an elastic wave determined by an electrode period of the IDT electrode; the first metal layer is arranged on the surface, away from the piezoelectric substrate, of the first buffer layer, the first metal layer comprises aluminum, and the thickness of the first metal layer ranges from 1% lambda to 30% lambda. According to the surface acoustic wave device, the electromigration resistance of Al can be improved, the tolerance power of the surface acoustic wave device can be improved, the durability can be considered, the frequency temperature coefficient of the surface acoustic wave device can be reduced, and the temperature stability of the surface acoustic wave device can be improved.

The invention discloses a vertical polarization arraying antenna for an emission system of a terrestrial digital television, which comprises a laminated flat radiating unit, a vertical polarization antenna array, an asymmetric broadband inverse feeder network, an impedance regulator, an input connector and fixing screws, wherein the laminated flat radiating unit, from top to bottom, comprises an upper plate, a lower pate and a ground plate; the vertical polarization antenna array is constructed by levelly and inversely arranging two laminated flat radiating units; the asymmetric broadband inverse feeder network is arranged between the lower plate and ground plate of the laminated flat radiating unit; one end of the impedance regulator is connected to the asymmetric broadband inverse feeder network while the other end is connected to the lower plate; an external conductor of the input connector is fixed on the ground plate, and an internal conductor penetrates through the ground plate to connect to the asymmetric broadband inverse feeder network. The antenna provided by the invention has the advantages of wide working band, small input standing-wave ratio (SWR), low cost and small size and the like characteristics; and the antenna is suitable for the application of the emission system of the terrestrial digital television in decimetric wave band.

The invention provides a broadband high-power protection module and device based on a tapered transmission line, the whole broadband high-power protection module is of a symmetrical structure, the broadband high-power protection module comprises a dielectric substrate, a grounding metal floor is arranged on the dielectric substrate, and a signal input end and a signal output end are arranged on the dielectric substrate. An input end impedance transmission line, a first gradient transmission line, a first-stage parallel diode array, an intermediate transmission line, a second-stage parallel diode array, a second gradient transmission line and an output end impedance transmission line are sequentially connected between a signal input end and a signal output end in the signal transmission direction. The line width of the first tapered transmission line is gradually broadened in the signal transmission direction, and the line width of the second tapered transmission line is gradually shrunk in the signal transmission direction. The gradient transmission line structure is utilized, the transmission line impedance at the installation position of each level of parallel diode array is reduced, the influence caused by the PIN diode capacitance effect is reduced, and the tolerance power of the protection module is improved.

The ultra-wideband high-gain beam tilt-up omnidirectional antenna of the present invention includes a first broadband sub-array and a second broadband sub-array coaxially arranged on the same medium substrate, the array elements of the two sub-arrays are not equal, and the minimum array element number is 1 , the array elements are all U-shaped symmetrical oscillators, the dielectric substrate is also provided with feeding wires, the oscillators of the first broadband sub-array and the second broadband sub-array are connected to the feeding cables through the feeding wires, and are respectively connected to the first broadband. The characteristic impedances of the two sections of the feeder cables of the sub-array and the second broadband sub-array are Z01 and Z02 respectively, and the input impedances Zin1 and Zin2 of the first broadband sub-array and the second broadband sub-array are respectively equal to their feed cables. Characteristic impedance, namely: Z01=Zin1, Z02=Zin2. The ultra-wideband high-gain beam-up omnidirectional antenna of the present invention has ultra-wideband, high gain, horizontal omnidirectional, beam-uplift, high power, high efficiency, light, small and portable, simple structure, economical and durable.

The invention discloses a novel bonding structure surface acoustic wave device and a preparation method thereof, and relates to the field of surface acoustic wave devices. The novel bonding structure surface acoustic wave device comprises a supporting substrate, a component gradient layer, a piezoelectric substrate and an interdigital transducer from bottom to top in sequence. The component gradient layer is used for providing total reflection of sound waves, the component sound velocity of the side, close to the substrate, of the component gradient layer is higher than that of the side, close to the piezoelectric substrate, of the component gradient layer, and components linearly change in the growth direction. The component gradient layer can inhibit generation of parasitic response, can also improve the quality of the bonding film and improve the electromechanical coupling coefficient and tolerance power of the device, and the preparation method is relatively mature and simple.

The invention discloses a 2 [um] waveband random optical fiber laser device based on an inclined optical fiber grating, and belongs to the technical field of optical fiber laser devices. The 2 [um] waveband random optical fiber laser device is composed of a pumping source, an optical fiber combiner, an optical isolator, a wavelength division multiplexer, an optical circulator, a first double-cladding thulium-doped optical fiber, a second double-cladding thulium-doped optical fiber and an inclined optical fiber grating inscribed on the second double-cladding thulium-doped optical fiber. According to the invention, the thulium-doped optical fiber is used for providing optical gain, the inclined optical fiber grating is etched on the second double-cladding thulium-doped optical fiber, the second-order Raman light oscillation starting is restrained by using the special refractive index distribution of the inclined optical fiber grating, and the generated random laser is output through thesecond double-cladding thulium-doped optical fiber inscribed with the inclined optical fiber grating; and the 2 [um] waveband random optical fiber laser device has the advantages of being high in conversion efficiency and output power and capable of acquiring specific-wavelength random laser output.

The invention discloses a substrate-free high-power amplitude limiter and a preparation method thereof, and the method comprises the steps: preparing a PIN amplitude limiting tube front surface technology on the surface of a PIN amplitude limiting diode material, carrying out the etching of a mesa structure which exposes P+, I and N+, and preparing a metal upper electrode; performing the spin coating of the front surface of the material containing the PIN diode mesa structure with an adhesive; oppositely and temporarily bonding with the front surface of the temporary slide; thinning and removing the residual substrate; preparing a metal lower electrode on the back surface of the PIN diode material after the substrate is removed; separating the temporary slide glass, and cleaning and scribing the slide glass to obtain the high-power amplitude limiter consisting of a PIN amplitude limiting diode without a substrate and a metal electrode positioned on the back surface of the diode. According to the invention, the Si/GaAs substrate of the traditional PIN amplitude limiting diode is removed, the metal with higher thermal conductivity is used, and meanwhile, the metal material has lower series resistance compared with a semiconductor, so that the tolerance power of the PIN amplitude limiting tube is further improved.

The invention belongs to the technical field of electroacoustics, and discloses a loudspeaker. The loudspeaker comprises a magnetic circuit assembly, a vibration assembly and a basin stand; the magnetic circuit assembly comprises a magnetic conductor, magnetic steel and a magnetic conductive sheet, wherein the magnetic conductive bowl is provided with an accommodating cavity, the bottom wall of the accommodating cavity is provided with a bottom groove, the magnetic steel is provided with a first through hole, and the magnetic conductive sheet is provided with a second through hole; the magnetic steel and the magnetic conductive sheet are sequentially stacked on the bottom wall of the containing cavity, the first through hole is communicated with the second through hole and the bottom groove, and gaps are formed between the magnetic steel and the side wall of the containing cavity and between the magnetic conductive sheet and the side wall of the containing cavity. the vibration assembly comprises a voice coil and a vibration membrane, the vibration membrane covers one end of the voice coil, a winding wire is arranged at one end, far away from the vibration membrane, of the voice coil, and one end, provided with the winding wire, of the voice coil is inserted into the gap in an up-and-down moving manner; the basin stand is used for connecting the magnetic conductive bowl and thevibration assembly. The loudspeaker is simple in structure, and the heating temperature of the voice coil can be reduced, so the bearing power of the loudspeaker is increased.

The invention provides a microwave broadband power amplifier. The microwave broadband power amplifier comprises a final-stage amplification unit PA2, a final-stage amplification unit input match and a final-stage amplification unit output match, wherein the final-stage amplification unit input match, the final-stage amplification unit PA2, and the final-stage amplification unit output match are connected in sequence; the final-stage amplification unit output match adopts a spiral line Balun structure. The amplifier has the advantages that a working bandwidth is relatively wide and output power is relatively great; the size of a PCB (Printed Circuit Board) of the power amplifier is relatively small and heat dissipation is easy to realize.