59results about How to "Broadband" patented technology

The invention provides a magnetic drive peak force modulated atomic force microscope and a multi-parameter synchronous measurement method thereof, relates to the technology of measurement of the material surface topography and mechanical properties under the micro-nano scale, and aims at solving the problems that the driving frequency range of the probe in the conventional method based on the force-displacement curve is limited and integrally driving the probe interferes the movement of the probe cantilever and influences the measurement accuracy under the liquid environment. A coil is arranged in a sample table. The probe tip is provided with magnetic particles which are magnetized along the length direction of the probe or have the magnetized component of the direction. Firstly the PSD voltage curve U<free> of vibration of the probe in the free state is acquired, then the PSD voltage curve U<inden> of the tip position when the probe intermittently contacts the sample is acquired, the voltage curve U<Force> of the probe under stress is acquired by U<free> and U<inden>, and the force-displacement curve is acquired according to all the curves so as to acquire the mechanical properties of the material through combination of the corresponding contact mechanical model. The driving frequency range of the probe is wide and the measurement accuracy is high so as to be suitable for the research of polymer composite material or biological cells.

The invention relates to a non-contact transmission friction-electromagnetic composite wave energy collector adapted to complex excitation. The device collector comprises a floating ball, a rocker, alifting rod and a frequency-increasing electromagnetic power generation assembly, the floating ball is rigidly connected with the top of the rocker; the bottom end of the rocker is connected with thelifting rod through a universal joint; an electret rolling ball capable of rolling is arranged in the floating ball; a metal pole I and a metal pole II are arranged on the lower surface in the floating ball; the lifting rod is arranged in a lifting sleeve; a spring is arranged between the lifting rod and the lifting sleeve; a driving permanent magnet combination is arranged on the lifting rod; thelower end of the lifting sleeve is connected with a frequency-increasing electromagnetic power generation assembly, the frequency-increasing electromagnetic power generation assembly is provided witha driven permanent magnet combination, the driving permanent magnet combination is in magnetic coupling connection with the driven permanent magnet combination, the driven permanent magnet combination is in mechanical transmission connection with a power generation permanent magnet, and the power generation permanent magnet is correspondingly provided with a power generation induction coil. The collector can effectively work in a marine all-weather climate environment, adapts to complex wave excitation, and has a frequency increasing function and high reliability.

The invention discloses a printed broadband terminal antenna, and mainly solves a problem that an antenna in the prior art cannot satisfy people's requirements of broadband and miniaturization of the antenna at the same time. The printed broadband terminal antenna comprises a printed circuit board, a printed board metal platform disposed on a surface of the printed circuit board, and also comprises a first bending metal strips group and a second bending metal strips group disposed on the other surface of the printed circuit board, a microstrip feeder connected with an end of the first bending metal strips group, and an earthing device connected with the second bending metal strips group. The second bending metal strips group has a semi-enclosed cyclic structure and surrounds the first bending metal strips group. With the above scheme, the printed broadband terminal antenna achieves an objective of realizing antenna miniaturization while the bandwidth is guaranteed, and has very high utility value popularization value.

A self-common phase on-chip interference spectrum imaging method comprises the following steps: S1, determining lens array distribution according to a lens array usefulness function; S2, enabling lenses to make primary phase adjustment for incident lights through a dielectric wetting effect or integral body deformations; S3, enabling the primarily phase adjusted incident lights to form baseline pairs through a photon integration chip, and accurately adjusting phases of the base line pairs so as to form interferences, thus forming interference images; S4, extracting information of the interference images; S5, using a photon interference image reconstruction method to obtain a target digital image and a spectrum image according to the interference image information.

The invention discloses a piezoelectric composite material for a broadband transducer, and belongs to the technical field of the piezoelectric material. The piezoelectric composite material comprises a piezoelectric crystal and polymers; wherein, the piezoelectric crystal is divided into an upper part and a lower part; the upper part of the piezoelectric crystal is provided with a plurality of piezoelectric crystal pillars which are uniformly arranged; the lower part of the piezoelectric crystal is a piezoelectric substrate; the heights of the piezoelectric crystal pillars present periodical differences, so that the thickness of the substrate is not uniform; the polymers are filled between the piezoelectric crystal pillars; and the polarization direction of the piezoelectric crystal pillars and the piezoelectric substrate is along the thickness direction of the piezoelectric composite material. Due to the different resonance frequencies of the piezoelectric crystalline pillars, the bandwidth of the piezoelectric composite material can be increased by changing the heights of the piezoelectric crystal pillars. The Q value of the piezoelectric composite material can reach below 10, and the composite material is applicable to the preparation of the broadband transducer.

The invention discloses a systematic test method for the regional stability control joint debugging. The systematic test method comprises the following steps: a regional stability control test systemcomprises a host automatic test platform, a test terminal and a stability control device; through the cloud communication platform based on 5G signals, the host automatic test platform is in communication connection with the test terminal, and bidirectional transmission of information between the host automatic test platform and the test terminal is realized. Realizing information interaction between the test terminal and the stability control device based on a standardized communication protocol; the host automatic test platform is used for issuing test cases and receiving action informationof the stability control device; and judging the correctness of the test result according to the received feedback information and generating a test report, thereby realizing the full-automatic closed-loop test of the host automatic test platform, the test terminal and the stability control device in the whole process. According to the method, comprehensive, standardized and intelligent detectionof the stability control system can be realized, and the detection efficiency of equipment of different manufacturers can be improved.

The invention relates to a surface enhanced Raman spectroscopy (SERS) sensing base plate. A first embodiment of the invention comprises a base plate and a nanometer straight column structure formed by a plurality of layers of metal / dielectric substance materials growing on the base plate, wherein the nanometer straight column structure is provided with a configuration and is roughly parallel to the normal direction of the base plate after growing up.

The invention provides a radome material and a preparation method thereof. A radome is prepared by using an ultrahigh-molecular weight polyethylene fiber composite material, and the mechanical properties of the radome are superior to the mechanical properties of commonly used glass fiber and aramid fiber on the premise of the same thickness. The ultrahigh-molecular weight polyethylene fiber has ahigh main chain orientation degree and high crystallinity, the strength of the ultrahigh-molecular weight polyethylene fiber is the highest among currently used fiber, and the ultrahigh-molecular weight polyethylene fiber has the advantages of high modulus, high UV resistance, high resistance to chemical corrosion, resistance to low temperature, a long service life, impact resistance, cutting resistance, high toughness and the like. The radome material has a lower thickness than that of an existing radome material under the same mechanical requirements, and the cost of the material is reducedon the premise of reduction of the use amount of the raw material; and the preparation method of the radome material has simple molding process equipment, mature technologies and a high production speed, and the manufacturing cost is reduced.

The invention relates to a wideband microstrip isolator, which comprehensively considers the effects of electromagnetic parameters of a ferrite substrate, central working frequency and a bias field, and provides a best parameter combination. The microstrip isolator effectively solves the resistance matching problem, has the advantages of small volume, light weight, capable of being plastered, etc., realizes the wideband of the microstrip isolator and can be widely applied to the field of microwave communication field.

The invention provides an RFID reader / writer antenna. The reader / writer antenna comprises a PIFA antenna array supported by a PCB. The PIFA antenna array is in a polygonal ring shape; Each side of thepolygon ring is a PIFA antenna element; A multi-point feeding network is arranged at the PCB in the middle of the polygon ring. The input port of the multi-point feeding network is connected with each PIFA antenna unit, and the output port of the multi-point feeding network is connected with a radio frequency connection line. The antenna adopted by the invention is low in cost and wide in near-field radiation range, and the antenna body is small, so that the antenna body is easy to be installed and used.

The invention relates to a large-field-depth large-view-field wide-temperature-variance high-image-quality optical system. A first negative lens, a second negative lens, a first positive lens, a third negative lens, a diaphragm, a second positive lens, a third positive lens, a fourth positive lens and a fourth negative lens which are successively arranged on an optical path. The large-field-depth large-view-field wide-temperature-variance high-image-quality optical system provided by the invention facilitates correction of field curvature, effectively resists complex particle irradiation in space, prevents degumming in a complex space environment and is applied to space environment.

The invention provides a preparation method of a nickel-manganese zinc ferrite material with a high impedance and magnetic property. The preparation method comprises the following steps: preparing a meta nitrate solution from metal salt containing Ni<2+>, Mn<2+> and Fe<2+> to obtain a mixed solution A, adding an alkali solution of graphene into the mixed solution A, adding ethylene diamine tetraacetic acid under magnetic stirring, adding ammonia water dropwise to adjust the pH value to 4 to 6, heating to 80 to 110 DEG C, reacting for 1 to 2 hours and standing for 3 to 5 hours; performing suction filtration, washing and drying to obtain a first material; adding a dicyclopentadienyl ferromagnetic powder, polyvinyl alcohol (PVA) and bisphenol A epoxy resin into the first material, mixing andball-milling to obtain a second material; and performing pressing formation on the second material, performing microwave sintering and cooling to obtain the nickel-manganese zinc ferrite material. According to the method and through the improvement of the process and the addition of the materials, low loss and high impedance within high-frequency range are realized and the application range of themanganese zinc ferrite material is enlarged.

The invention discloses a piezoelectric-hydraulic mixed linear type stepping motor and a working method thereof. The motor includes a stator, a rotor and a base. The stator includes a drive foot, a support, and an elastic preload mechanism. The drive foot comprises two symmetrically-arranged sets of piezoelectric laminated layers arranged parallel to a guide rail and vibrating hydraulic cylinders arranged perpendicular to the guide rail direction, providing the stator drive foot with slight vibration parallel to the guide rail direction and perpendicular to the guide rail direction, respectively. Symmetrical triangular periodical signals are used to excite the piezoelectric laminated layers parallel to the guide rail direction and symmetrical periodical signals are used to excite the vibrating hydraulic cylinders perpendicular to the guide rail direction, so that the frictional driving characteristics between the stator and the rotor of the motor at a driving stage and a returning stage are significantly different, and thus the moving distance of the rotor at the driving stage is greater than that of the returning stage. The positioning precision of the motor gradually changes from nanometer level to micron level. Hopefully, the motor can substitute macro-micro combined positioning platforms with complex structures.

The invention discloses an impedance transformer network circuit structure. Three JFET tubes are cascaded to form a source follower, two triodes are cascaded to form a buffer, the input capacitance of the source follower and the output capacitance of the buffer can be reduced, the bandwidth is increased at the same time, the external interference is reduced, the isolation degrees between channels is improved, and the occurrence of high-frequency oscillation is inhibited.

The invention relates to an optical system for a star sensor. The optical system is applied to high-precision star sensors. The optical system is of an improved peaceful structure and consists of six lenses, wherein the six lenses are all spherical lenses; an aperture diaphragm is arranged on first glass; the first glass is made of fused quartz, can be used for correcting aberration and can be used as protective glass of the optical system. The optical system has the characteristics of wide spectrum, large visual field, relative large aperture and the like; the distortion is very low in relatively large spectral range and visual fields, concentration ratios of discs of confusion of each visual field are uniformly distributed, and the imaging quality is good. The optical system can work in a temperature range from -40 DEG C to 50 DEG C, has good image quality and defocusing amount at each temperature point and can meet attitude measurement requirements of the high-precision star sensors working at severe space temperature environments.

The invention discloses an ultra-micro capsule material, a preparation method and application thereof. The ultra-micro capsule material is of a core-shell structure; the core-shell structure is composed of rare earth cobalt magnet R2Co17 micron-order particles which are adopted a core and protonated polypyrrole which is adopted as a shell. The preparation process of the ultra-micro capsule material includes the following steps that: a rare earth cobalt magnet R2Co17 block is ground and ball-milled, so that rare earth cobalt magnet R2Co17 micron-order particles can be obtained; the rare earth cobalt magnet R2Co17 micron-order particles are added into protonated pyrrole monomer; and an ammonium persulfate oxidizing agent is added into the protonated pyrrole monomer, and a newly obtained mixture is stirred, so that the ultra-micro capsule material can be obtained. The high-complex magnetic permeability rare earth cobalt magnet and the high-complex permittivity protonated polypyrrole are composited, so that the wave absorbing property of the ultra-micro capsule material in a microwave S-band can be effectively improved.

The invention belongs to the technical field of phase shifters, and particularly relates to an adjustable broadband photonic RF phase shifter based on a highly nonlinear fiber loop. A first continuous wave laser is connected with a signal generator. The signal generator is connected with a first polarization controller through a first erbium-doped fiber amplifier and a first band-pass filter. A second continuous wave laser is connected with a second polarization controller through a second erbium-doped fiber amplifier, a second band-pass filter and an attenuator. The first polarization controller and the second polarization controller are connected with the highly nonlinear fiber ring through a coupler. The highly nonlinear fiber ring is connected to a photodetector through a third erbium-doped fiber amplifier and a third band-pass filter. The photodetector is connected with an oscilloscope. The problems of bandwidth limitation and narrow phase shift tuning range existing in the operation of the conventional radio frequency phase shifter can be solved. The adjustable broadband photonic RF phase shifter based on the highly nonlinear fiber loop is mainly used for photon phase shifting.

The invention discloses a differential linear piezoelectric motor and a working method thereof. A driving foot on a motor stator comprises two groups of symmetric piezoelectric stacking layers parallel with a guide rail, and one group of piezoelectric stacking layers vertical to the guide rail, so as to respectively provide slight vibration in parallel with and vertical to the guide rail direction for the stator driving foot. The differential linear piezoelectric motor has the advantages that by utilizing symmetric periodic signals to excite piezoelectric stacking layer parallel with the guide rail direction, and rectangular wave signals to excite the piezoelectric stacking layer vertical to the guide rail direction, the friction driving characteristic between the motor stator and a rotor has obvious difference between the driving phase and the return phase, so that the movement distance of the motor in the driving phase is greater than the movement distance in the return phase; because the motor has obvious different differential friction characteristic in the frequency range of 0 to 1KHz, when the driving frequency is changed from low frequency to high frequency, the positioning accuracy of the motor is gradually changed from nanometer level to micrometer level, and the macro-micro combined positioning platform with complicated structure may be replaced.

The invention discloses a fireproof flame-retardant plastic optical cable which is characterized by comprising a plastic optical fiber and a sheath wrapping the outer side of the plastic optical fiber. The plastic optical fiber comprises a plastic optical fiber core wire and a covering layer formed on the plastic optical fiber core wire; the plastic optical fiber core wire is prepared from the following components in parts by weight: 100 parts of an allyl methyl carbonate / GAM MA-butyrolactone-3-yl methacrylate / 2-methyl-4-pentanoic acid copolymer, 4-8 parts of a nano hybrid hyperbranched polymer HB-SiO2, and 1-2 parts of boric acid; the covering layer is prepared from the following raw materials through ultraviolet curing: 5 to 8 parts of 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate, 15 to 25 parts of 2, 2, 3, 3-tetrafluoropropyl methacrylate, 8 to 12 parts of vinyl hyperbranched polysiloxane, 1 to 3 parts of glass fiber, 0.5 to 1.5 parts of a coupling agent and 0.4 to 0.8 part of a photoinitiator. The fireproof flame-retardant plastic optical cable disclosed by the invention is remarkable in fireproof flame-retardant effect, excellent in heat resistance, good in chemical corrosion resistance, aging resistance and durability and small in transmission loss.

The invention belongs to the technical field of wireless communication base station antennas, and discloses an ultra-wideband dual-polarized radiation unit and an antenna. The ultra-wideband dual-polarized radiation unit comprises four symmetrical radiation arms, Balun supporting columns, a base, a vibrator wire and a matching wire, the four symmetrical radiation arms symmetrically rotate about the center of the radiation unit, each Balun supporting column is connected with the corresponding symmetrical radiation arm and the base, an inner conductor of the vibrator wire is connected with one symmetrical radiation arm, an outer conductor of the vibrator wire is connected with one Balun supporting column, and the matching wire is connected with the diagonal vibrator wire of the radiation unit. The antenna comprises a metal reflector and at least one ultra-wideband dual-polarized radiation unit. The problem of large physical size of the radiation unit usually caused by wideband of the radiation unit in the prior art is solved.

The invention discloses a reflective type wireless optical-fiber communication system. The reflective type wireless optical-fiber communication system comprises a plane mirror, a convex lens, a reflective type modulator, a silicon light cell panel, a demodulation and amplification circuit and a loudspeaker. Sunlight irradiates the plane mirror, plane mirror reflected light forms a convergent light beam through the convex lens, the convergent light beam irradiates the reflective type modulator to form an optical carrier wave of an optical modulation signal, the optical carrier wave irradiates the silicon light cell panel, the silicon light cell panel generates a corresponding electrical signal to be connected to the demodulation and amplification circuit, the signal after demodulation reduction and amplification is connected to the loudspeaker through the demodulation and amplification circuit, and the loudspeaker can play an amplified sound signal. The reflective type wireless optical-fiber communication system has the advantages of low cost, energy conservation, environmental protection, the wide frequency band, simple and flexible erecting, high anti-interference performance, good transmission secrecy performance and the like.

The invention relates to a graphene wave-absorbing metamaterial for an encrypted computer display. The metamaterial structure comprises a plurality of periodically arranged metamaterial structure units, each meta-material structure unit comprises a meta-material structure I and a meta-material structure II. The metamaterial structure I comprises a first conductive layer and a first dielectric layer; the first conductive layer is arranged on the first dielectric layer; the first conductive layer is provided with a double-L-shaped structure which is symmetrical about the center of the metamaterial structure unit. The metamaterial structure II comprises a second conducting layer and a second dielectric layer, the second conducting layer is arranged on the second dielectric layer, the second conducting layer is provided with four L-shaped structures which are symmetrical about the center of the metamaterial structure unit, and the edges of the L-shaped structures are parallel to the edgesof the corresponding metamaterial structure units respectively; the thickness is small, the absorption rate of electromagnetic waves with the working frequency band ranging from 8.25 GHz to 17.35 GHzis higher than 90%, and the average transmittance of visible light bands is 85%; the invention relates to the technical field of electromagnetic protection.

The invention relates to the technical field of dispersion type spectra, in particular to a wide-spectrum high-resolution spectral dispersion method and device. The device comprises a first dispersionsystem, an image slicer, a first light condensation module, a second collimation module, a second dispersion system and a detector which are sequentially arranged along a light path; a point target is introduced into a spectrograph system through an optical fiber, enters the first dispersion system after being collimated for light splitting and is imaged on a plane of the image splitter after being condensed, light of different spectra is split through the image splitter and reflected at different angles, convergence and collimation are achieved, secondary light splitting is performed after the light enters the second dispersion system, and the light is imaged on the face of a detector. Wide-spectrum high-resolution spectral dispersion can be achieved, and the method and device are applicable to the fields of material composition analysis, astronomical optic signal detection, atmosphere wind speed measurement and the like.

The invention relates to an electromagnetic dipole complementary end-on-fire antenna with a high front-to-back ratio. The antenna comprises a first radiation main body, a second radiation main body, a Balun feeder line and a dielectric substrate; the first radiation main body and the second radiation main body are printed on the upper surface and the lower surface of the dielectric substrate respectively, and the Balun feeder line is further printed on the upper surface of the dielectric substrate and used for feeding the second radiation main body; a first radiation main body printed on the upper surface of the dielectric substrate is a discontinuous circular ring, a second radiation main body printed on the lower surface of the dielectric substrate is a T-shaped dipole, the middle part of the T-shaped dipole is slotted, and the discontinuous circular ring and the slotted T-shaped dipole are bilaterally symmetrical along the slot line of the slot. The antenna does not need an additional reflecting plate, and can achieve a good directional radiation characteristic. The antenna can provide a high-back-ratio and broadband antenna, is simple in structure, can realize directional radiation without a reflecting plate, can effectively reduce the size, adopts a planar structure, is low in manufacturing cost, and is suitable for placing a blind area which is relatively weak in communication signal coverage and limited in space.

The invention relates to a lens structure, a lens antenna and electronic equipment. According to the lens structure, the artificial surface plasmon waveguide can be generated by utilizing a pluralityof pairs of second slots, by setting the gradual change rule of the number of the second slots of an inter-layer or intra-layer slot units, a phase delay distribution rule is obtained to realize a beam convergence function, and the dielectric loss of electromagnetic waves in the waveguide transmission process is low, so that the lens antenna with lower loss, higher efficiency and larger broadbandcan be realized in practical application. In addition, through the dielectric layers and the conductive layers which are alternately laminated, the assembly and preparation of the low-cost lens can berealized.

The invention provides a Fourier overlapping correlation imaging system and method based on computational ghost imaging. The system comprises a spatial filter, a spatial light modulator, an imaging module, a high speed light sensitive array, a processing module which is used for calculating the image of the corresponding position of each single pixel detector and using the image as the low-resolution image of tilted plane wave illumination whose light source is the single pixel detector, and a calculation module. The calculation module is used for carrying out Fourier transforming on the low-resolution image to acquire the move and low-pass filter of a spectrum corresponding to a target high-resolution image at the incident angle and the numerical aperture of the objective lens, splicing the overlapped relevant parts of the spectrum of the low-resolution image to acquire the spectrum of the target high-resolution image, and using a phase recovery algorithm to acquire the target high-resolution image. According to the invention, the image acquisition efficiency of the whole imaging system can be improved; measurement of a wider spectrum than an ordinary array sensor is realized; compression reconstruction of an image is realized; and the rate of single imaging is improved.

The invention discloses a butterfly indoor introducing optical cable for an access network, which comprises an optical fiber, reinforcing cores and a butterfly sheath, wherein the optical fiber is located at a central position of the butterfly sheath, the reinforcing cores are arranged at two wings of the butterfly sheath respectively, and the reinforcing cores are carbon fiber rods. The butterfly indoor introducing optical fiber for the access network has the advantages that the optical fiber is special and bending resistant, a wider broadband is provided, and the network transmission performance is enhanced; the two parallel carbon fiber rods enable the optical fiber to have good compression resistant performance, and the optical fiber is protected; the optical cable is simple in structure, light in weight and high in practicability; the optical cable is of a unique groove design, easy to be stripped and connected conveniently, and installation and maintenance are simplified; the sheath is low-smoke, halogen-free, flame retardant and environment-friendly; and the optical cable has excellent practicability, and can generate good economic benefits and social effects.

The invention provides a RC pre-amplifying circuit comprising a signal source Ui, a first cascade transistor, a second cascade amplifier, a bootstrap circuit, a load resistor R5, a miller capacitor C2 and a cascade negative feedback circuit. The base electrode of the first cascade transistor is connected to the input end of the signal source Ui, the emitting electrode is connected to the input end of the cascade negative feedback circuit which is connected to the output end of the second cascade amplifier, the collecting electrode of the first cascade transistor is connected to one end of the load resistor R5 and the negative input end of the second cascade amplifier, and the other end of the load resistor R5 is grounded, the output end of the second cascade amplifier serves as a signal output end; two ends of the miller capacitor C2 are connected to the negative input end and output end of the second cascade amplifier, and the bootstrap circuit is connected between the positive input end of the second cascade amplifier and the positive end of the signal source Ui. The RC pre-amplifying circuit is simple in structure, small in size and low in cost, and the stability is same as that of a dual operational amplifying circuit.

The application relates to a lens structure, a lens antenna and electronic equipment. The lens structure can generate artificial surface plasmon waveguides by using multiple pairs of second conductive sheets. By setting the gradual change law of the number of second conductive sheets in the interlayer or intralayer waveguide structure, the phase delay distribution law is obtained to realize the beam Convergence function, and the dielectric loss of the electromagnetic wave along the waveguide is low, so the lens antenna with smaller loss, higher efficiency and wider bandwidth can be realized in practical applications. In addition, by alternately stacking dielectric layers and waveguide layers, low-cost lens assembly can also be achieved.

The invention discloses a multichannel fiber bragg grating chromatic dispersion compensator. Gratings carved on fibers serving as base materials are interleaved amplitude sampling gratings, and the interleaved amplitude sampling gratings comprise multiple grating periods with different central wavelengths in a sampling period; and the gratings with different central wavelengths are written, and when the chirp of the grating periods with different central wavelengths synchronizes, the obtained chirp of spectra is the sum of the chirp of each central wavelength. By utilizing the method, the energy utilization ratio of the gratings can be improved effectively, and a reflecting channel with high energy efficiency is obtained; and the interleaved amplitude sampling gratings have the effect of chromatic dispersion superposition, so that the small chirp of each grating with different central wavelengths occurs so as to obtain large chromatic dispersion and avoid the superimposing phenomenon of the adjacent spectra caused by overlarge chirp coefficients. The invention provides the chromatic dispersion compensator with narrow band, wide broadband and high energy efficiency, and provides a new concept for the design of different grating chromatic dispersion compensators.