135 results about "Secondary radiation" patented technology

The invention discloses a frequency spectrum monitoring and interference analysis method for power grid wireless communication, and particularly relates to the technical field of wireless frequency spectrum monitoring. Outputting an eddy current distribution parameter set based on the power frequency magnetic field intensity distribution data of the monitoring point; synchronously acquiring a frequency spectrum signal and a power frequency magnetic flux density signal; calculating high-frequency harmonic frequency point characteristics of secondary radiation generated by the frequency spectrum monitoring equipment in the power frequency magnetic field, and generating an eddy current characteristic spectral line graph; extracting a frequency band energy value matched with the eddy current characteristic spectral line diagram in the frequency spectrum signal, and calculating a pollution proportion of secondary radiation to the frequency spectrum signal in combination with the power frequency magnetic flux density signal; eliminating pollution signal components according to the pollution proportion, and outputting a real spectrum; and performing joint scanning on the real frequency spectrum, extracting modulation characteristics and spatial orientation of the residual interference signal, and generating an interference source positioning report. The problem of real spectrum signal distortion caused by eddy current secondary radiation in a power frequency magnetic field environment is solved, and the accuracy and reliability of spectrum monitoring and interference analysis are improved.

The invention discloses a broadband circularly polarized scattering reconfigurable array antenna based on variable capacitance diode loading, and the broadband circularly polarized scattering reconfigurable array antenna is composed of a plurality of scattering reconfigurable antenna units. The scattering reconfigurable antenna unit comprises a resonance structure used for radiating or receiving signals and a feed and phase shift structure arranged on the lower surface of the resonance structure. The feed and phase shift structure comprises a broadband directional coupler and a reflection type broadband phase shifter. When the scattering reconfigurable antenna unit is in a radiation working state, the broadband directional coupler radiates energy to the resonant structure; when the scattering reconfigurable antenna unit is in a scattering working state, the broadband directional coupler transmits energy to the reflection type broadband phase shifter, and the reflection type broadband phase shifter regulates energy of secondary radiation of the reflection type broadband phase shifter according to bias voltage applied to an internal variable capacitance diode. The array antenna provided by the invention is wide in working frequency band, and the radiation performance can be ensured while the scattering characteristic is reconfigurable.

The invention relates to a waveform and dispersion comprehensive optimization method for a broadband wide-angle array-fed reflector antenna, and solves the optimization problem that the consistency of gain, sidelobe and frequency band is difficult to consider at the same time. The method comprises the following steps: extracting secondary radiation field data of the array-fed reflector antenna; carrying out feed source excitation phase structured modeling; constructing a multi-target fitness function; performing joint optimization on the two excitation parameters; and applying the optimal excitation parameters. According to the invention, an excitation phase is divided into a delay line length and a phase shifter true value, so that layered regulation and control of dispersion and waveform are realized; a multi-frequency-point multi-target fitness function is constructed, and the optimization efficiency and convergence are improved in combination with an improved multi-population genetic-particle swarm optimization algorithm; on the premise that the antenna structure is not changed, comprehensive optimization of the waveform and dispersion of the directional diagram is achieved only through phase optimization, the physical significance of modeling is clear, the control strategy is simple, the calculation efficiency is high, the engineering adaptability is high, and the method is suitable for application scenes such as GEO SAR with strict requirements for the performance of the directional diagram.

The invention relates to the technical field of antennas, and discloses an unmanned aerial vehicle directional detection antenna and unmanned aerial vehicle detection device.The unmanned aerial vehicle directional detection antenna comprises a secondary radiation layer provided with a first substrate and a main radiation layer provided with a second substrate, and the first substrate is provided with a first radiation patch array and a second radiation patch array; the first radiation patch array comprises 2n first radiation patches used for receiving electromagnetic wave signals of a first frequency f1, the second radiation patch array comprises m second radiation patches used for receiving electromagnetic wave signals of a second frequency f2, and the second radiation patches are arranged in gaps of the first radiation patch array at intervals; the second substrate and the first substrate are stacked at intervals along the first direction and are fixedly connected, a third radiation patch is arranged at a position, corresponding to the first radiation patch, on the second substrate, and a fourth radiation patch is arranged at a position, corresponding to the second radiation patch, on the second substrate. The size of the directional detection antenna of the unmanned aerial vehicle is reduced.

The utility model provides a millimeter wave antenna device and a terminal device, the millimeter wave antenna device comprises a grounding plate, a dielectric plate, a radiation assembly and a feed assembly electrically connected with the radiation assembly which are connected in sequence, and the vertical projection of the radiation assembly covers the grounding plate; the radiation assembly comprises a main radiation unit and a secondary radiation unit, and the secondary radiation unit is coupled with the main radiation unit; the secondary radiation unit comprises a first radiation patch antenna, a second radiation patch antenna, a third radiation patch antenna and a fourth radiation patch antenna, and the first radiation patch antenna, the second radiation patch antenna, the third radiation patch antenna and the fourth radiation patch antenna are coupled and connected around the main radiation unit. The millimeter wave antenna device not only can effectively improve the isolation between antennas, but also can effectively improve the overall radiation efficiency of the antennas.

The invention discloses a composite shielding collimator suitable for a complex mixed radiation field, belongs to the technical field of radiation shielding and measurement, and mainly solves the problems of low signal-to-noise ratio, high space background and mixed energy spectrum caused by the mixed radiation field of high-energy neutrons, gamma rays and the like in a fusion device and the problem that traditional equipment is heavy and difficult to flexibly adjust. The composite shielding collimator adopts a cylindrical shielding structure formed by aluminum oxide, boron-containing polyethylene, boron carbide and lead from outside to inside, and background interference and secondary radiation are remarkably inhibited by moderating and absorbing neutrons step by step and effectively shielding gamma rays; the neutron and gamma ray detector is integrally integrated on a rotatable supporting mechanism, unification of excellent radiation shielding performance and detection flexibility is achieved, and the neutron and gamma ray detector is mainly used for high-precision neutron and gamma ray diagnosis in complex radiation environments such as a magnetic confinement fusion device.

Measurement system and method are presented for determining spatial distribution of chemical elements in a sample. The system comprises a measurement unit and a control system. The measurement unit is adapted to produce primary radiation having spectral characteristic adapted to excite a number M of chemical elements in the sample to induce secondary radiation responses, and generate spectral measured data indicative of intensity of detected responses. The primary radiation interacting with the sample includes a sequence of two or more encoded radiation patterns of the primary radiation, each having its predetermined spatial intensity pattern. The measured spectral data includes a sequence of data pieces, each being modulated by the respective one of the two or more predetermined spatial intensity patterns of the encoded primary radiation and characterized by sparsity in spectral domain with respect to each spectral component of the secondary radiation response.

An optoelectronic component is specified. According to one embodiment, the optoelectronic component (1) comprises a semiconductor chip (3) configured to emit primary radiation (34), and a conversion element (4) configured to convert the primary radiation (34) into secondary radiation (42), wherein an aspect ratio of a height (x) of the conversion element and an edge length (z) of a luminous surface (11) of the optoelectronic component (1) is at most 1, and wherein the optoelectronic component (1) is configured to increase a conversion efficiency of the conversion element (4). In particular, the semiconductor chip (3) is a mini-LED or a micro-LED. Furthermore, an optoelectronic arrangement is specified.

An apparatus for use in a metrology apparatus comprises: selection optics; and a plurality of beam-modifying modules. The selection optics is arranged to receive an input radiation beam and is configurable so as direct the radiation beam to any one of the plurality of beam-modifying modules. Each of the plurality of beam-modifying modules is arranged to control the same at least one attribute of the radiation beam (for example wavelength, polarization, size, shape etc.). The selection optics may be arranged to receive secondary radiation output by any one of the plurality of beam-modifying modules and may be configurable so as direct the secondary radiation received from any one of the plurality of beam-modifying modules to a common output. A timescale for switching between two configurations of any one of the beam-modifying module may be larger than a timescale for switching between two configurations of the selection optics.

The invention belongs to the technical field of hydrophobic electromagnetic shielding materials, and particularly relates to an asymmetric electromagnetic shielding composite film and a preparation method and application thereof. The PNTs are polypyrrole nanotubes, after Na2MoO4. 2H2O and CH4N2S are added and subjected to a high-temperature reaction, a MoS2 flower-shaped shell structure can grow on the PNTs, the layered structure and the high specific surface area of MoS2 contribute to enhancing scattering and absorption of electromagnetic waves, and rich defect sites can induce dielectric polarization to achieve dielectric loss. Introducing the PNTs (at) MoS2 core-shell nanowire as an electromagnetic wave absorbent into a polylactic acid / dichloromethane system, then putting the system into a culture container in which a conductive filler is pre-paved, and standing and volatilizing at room temperature by adopting an ethanol solution as a volatile agent to finally obtain a three-layer asymmetric electromagnetic shielding composite film comprising the conductive filler, the PNTs (at) MoS2 structure and a polylactic acid matrix from bottom to top. And an asymmetric conductive gradient network is constructed, and the EMI shielding performance which mainly focuses on absorption is remarkably improved, so that the secondary radiation problem of electromagnetic waves is reduced.

The invention discloses a liquid crystal antenna and electronic equipment. The liquid crystal antenna comprises a first substrate and a second substrate which are oppositely arranged, the liquid crystal layer is positioned between the two substrates; a first metal layer is arranged on the surface of the side, away from the liquid crystal layer, of the first substrate and comprises a first radiator and a first feeder line which are connected. The second radiator and the second feeder line are connected; a second metal layer, a first slot and a second slot are arranged on the surface of one side, facing the liquid crystal layer, of the first substrate; a third metal layer is arranged on the surface of one side, facing the liquid crystal layer, of the second substrate and comprises a third feeder line and a fourth feeder line; in the direction perpendicular to the plane where the first substrate is located, the first slot is located in an area surrounded by the peripheral edge of the first radiator, the second slot is located in an area surrounded by the peripheral edge of the second radiator, the third feed line perpendicularly intersects with the first slot, and the fourth feed line perpendicularly intersects with the second slot. The first feeder line is vertically crossed with the third feeder line, and the second feeder line is vertically crossed with the fourth feeder line.

A method of processing radiation associated with an object (22), the method comprising: providing a primary radiation source (12, 12a), a secondary radiation source (14; 14b) and a primary detector (16; 16a) in the housing; emitting primary radiation (20, 20a) onto the object by means of the primary radiation source; by means of the primary detector, a plurality of primary activity periods (76; 76a), the primary radiation having interacted with the object; and radiating the secondary radiation (24; 24b) with a secondary pulse (80; 80b) onto the object, the secondary pulses being emitted in a plurality of primary inactivity periods (78; 78a), each primary inactive period being interleaved with the primary active period; wherein no secondary pulse is emitted during the primary activity period; and wherein during each primary inactivity period, the primary detector is inactive in terms of capturing incoming radiation during the primary inactivity period.

A missile telemetry antenna array based on feed phase difference and screw coupling, comprising: inverted F antenna, missile cabin, rectifier block, RF cable and transmitter; a plurality of inverted F antennas are evenly distributed around the central axis of the missile cabin, and the inverted F antennas are fixedly installed on the outer wall of the missile cabin; the inverted F antennas are connected with the transmitter through the RF cable; a rectifier block is arranged above the head of each inverted F antenna; the rectifier block is fixedly installed on the outer wall of the missile cabin; and the rectifier block is used for flow guiding, so that no stagnation point of aerodynamic heating appears on the inverted F antenna. The present application optimizes the gain depression of the axis direction of the missile body, realizes the protection of the aerodynamic heating and force of the antenna by installing the rectifier block in front of the antenna, generates electromagnetic resonance and induced current through the installation screw of the rectifier block, realizes the secondary radiation of electromagnetic waves and the reflection guiding effect.

A multi-beam charged particle beam system and a method for operating the multi-beam charged particle beam system with higher precision are provided. This improvement relates to a multi-beam forming unit that has lower sensitivity to secondary electrons, scattered charged particles, and x-ray radiation. Thereby, a plurality of primary charged particle beamlets can be generated with higher precision and a longer lifespan of the multi-beam forming unit. The present system and method are applicable to improved inspection of samples, such as wafer or mask inspection.

A method for inspecting particles is suitable for inspecting particles on a substrate. The method for inspecting the particles includes the following. The substrate is disposed on a stage. An inspection radiation is provided to irradiate on the substrate, in which the inspection radiation is suitable for exciting the particles on the substrate to emit a secondary radiation. Also, the secondary radiation is detected to confirm whether the particles exist on the substrate and positions of the particles are detected.

The invention relates to a method and a device for generating secondary radiation, in particular EUV radiation, wherein a surface (42) of a workpiece (40) is irradiated with at least one first and at least one second laser pulse. The at least one first laser pulse causes at least one first material slice (46) to be detached from the surface (42), in particular by means of a negative pressure wave, and the at least one second laser pulse causes a plasma to be generated from parts of the detached material slice (46), with secondary radiation being created. The secondary radiation is coupled out for use in a subsequent process, in particular in a lithography process.

The invention relates to a device (10) for generating a burst in secondary radiation (12), comprising a primary source (14) for generating primary radiation (16) and a secondary source (18) for generating the secondary radiation (12), wherein the device (10) is configured such that the primary radiation (16) strikes the secondary source (18) and thereby generates the secondary radiation (12), wherein the primary source (14) is configured for burst-mode operation in which several pulse-burst sequences (20), each consisting of several individual pulses (22), are generated, wherein the pulse-burst sequences (20) each have a duration in the range between 0.1 ms and 1 s. The invention further relates to a method for generating a burst in secondary radiation (12).

Laser light module (31) for a motor vehicle headlight (10) comprising a laser (18), a converter (22) arranged in the beam path of a laser radiation (30) emanating from the laser, which converter scatters part of the incident laser radiation from the laser and converts part of it into secondary radiation with a wavelength longer than that of the laser radiation, a detector (40) arranged in a beam path of radiation emanating from the converter and which generates a measured value as an actual value dependent on the amount of radiation emanating from the converter and incident on the detector, and a control unit (26) which compares the actual value with a target value and controls the laser depending on the comparison of the actual value with the target value, characterized in that the laser light module has a light deflection unit (20) with which different sub-areas (22.a, 22.1, 22.b) of the converter can be illuminated with laser radiation separately from each other in time and wherein the detector records sub-area-specific actual values ​​for different sub-areas and wherein the control unit is set up, in particular programmed, to determine the target value for a first sub-area as a function of an actual value that has been determined for a different sub-area.

The invention relates to the technical field of medical polymer materials, in particular to a high-crosslinking ultra-high molecular weight polyethylene material and a preparation method thereof.According to the method, two times of radiation and two times of heat treatment at different temperatures are combined, and high crosslinking and low free radical content are achieved through first-time radiation and remelting treatment; and secondary radiation and annealing treatment with the temperature lower than the melting point further improve the crosslinking degree and maintain high crystallinity. The obtained material is superior to a material prepared by a traditional single method in the aspects of residual free radicals, oxidation index, swelling degree, crystallinity, mechanical property, wear rate and the like, and has the advantages of high wear resistance, high oxidation resistance and high strength.

The invention relates to an automatic assisted reproduction system based on sound-driven bubble microfluid, and belongs to the field of micro-nano operation robots. Comprising the key steps of focusing, capturing, rotating, three-dimensional reconstruction and evaluation and the like, and the problems of high cost and long period in traditional manual operation are solved. The system utilizes secondary radiation force generated by sound wave driving bubble vibration to perform non-contact accurate control on oocytes or embryos. Meanwhile, multi-angle image capture is realized in combination with a three-degree-of-freedom operation platform, and continuous and stable three-dimensional reconstruction and morphological evaluation of the embryo in a long-period culture process are supported. Wherein the deep learning neural network is responsible for analyzing an embryonic development image in real time, and the intelligent algorithm is used for dynamically optimizing an operation path and parameters, so that the system is ensured to efficiently and accurately complete tasks without manual intervention, and the stability and success rate of operation are remarkably improved.

The application provides an LED epitaxial structure and a preparation method thereof. The active layer is provided with a plurality of quantum well structures connected in series through a tunnel junction. The tunnel junction comprises a P-type high-doped semiconductor layer, an intermediate layer and an N-type high-doped semiconductor layer stacked in a first direction. The P-type high-doped semiconductor layer and the N-type high-doped semiconductor layer serve as a body of the tunnel junction, and the intermediate layer is used for constructing a secondary electric field in the tunnel junction. When an electron from the N-type semiconductor layer enters the active layer to recombine with a hole, the electron is gradually transferred to a subsequent quantum well structure in the first direction under the action of a strong built-in electric field of the tunnel junction, so that the electron and the hole are repeatedly used, and secondary radiation recombination occurs. The plurality of quantum well structures connected in series through the tunnel junction can repeatedly use the electron and the hole to generate more photons.

An X-ray source is disclosed, comprising: an electron source configured to provide an electron beam; an aperture configured to limit the angular distribution of the electron beam; a secondary emission limiting aperture configured to limit the angular distribution of the secondary X-ray emission, wherein the electron beam causes secondary X-ray emission to be emitted from a region surrounding the aperture; a first deflector located downstream of the electron beam limiting aperture and configured to deflect the electron beam toward the secondary emission limiting aperture; a target located downstream of the secondary emission limiting aperture and configured to generate primary X-ray emission through interaction with the electron beam; and an exit window located to transmit the primary X-ray emission, wherein the secondary emission is prevented from reaching the exit window by the secondary emission limiting aperture. A corresponding method is also disclosed.

The invention discloses an antenna array decoupling structure based on coupled electromagnetic waves and a design method thereof, and relates to the technical field of antenna decoupling, the antenna array decoupling structure comprises a microwave absorber unit and a radiator unit; the microwave absorber unit is arranged between adjacent antenna units of the antenna array and is used for absorbing coupling electromagnetic waves between the adjacent antenna units; the radiator unit is connected with the microwave absorber unit through the feed network structure, and the coupled electromagnetic waves absorbed by the microwave absorber are radiated out, so that the radiation performance of the antenna array is improved; according to the above structure, the microwave absorber is utilized to absorb coupling electromagnetic waves, coupling between adjacent antenna units of the antenna array is reduced, and meanwhile, secondary radiation can be carried out through the radiator unit so as to enhance the radiation performance of the antenna array.

The invention relates to an optical module (1) with a housing (2) and an optical element (3) housed therein. The housing (2) has several axially extending (7) recesses (14) on an inner surface (8) facing the optical element (3), open towards the optical element (3), for guiding a cooling gas to cool the optical element (3). The invention also relates to a laser system (20) with such an optical module (1). Furthermore, the invention relates to methods (33) for operating the laser system (20), for generating a plasma (29) of a target material (29) for generating secondary radiation (30), and for manufacturing microchips (32) or semiconductor intermediates (32).

This invention provides a foldable device and a laptop computer. The radiation enhancement device includes: a hinge, a top cover, a base, an antenna, and a radiating slot area. The top cover and the base are rotatably connected via the hinge. A connection gap exists between the hinge and the base. The antenna is disposed at the connection between the hinge and the top cover. A radiating slot area is provided on the base at the antenna projection position. The radiating slot area includes multiple radiating slots, which are used to collect and re-radiate the energy emitted by the antenna. The radiating slots are connected to the connection gap to form a secondary radiation system, thereby achieving the collection and transfer of radiated energy, effectively reducing mutual interference between the two antennas, and improving isolation. Furthermore, this embodiment also provides a virtual feed point at the edge of the connecting slot within the radiating slot area. The virtual feed point works collaboratively with the radiating slot area to optimize antenna performance and improve radiation efficiency.

The invention provides a foldable device and a notebook computer. A radiation enhancement device comprises a rotating shaft, an upper cover, a base, an antenna and a radiation slot area, the upper cover is rotationally connected with the base through a rotating shaft; a connecting gap is formed between the rotating shaft and the base; the antenna is arranged at the joint of the rotating shaft and the upper cover; a radiation slot area is arranged on the base and at the projection position of the antenna; the radiation slot area comprises a plurality of radiation slots, and the radiation slots are used for collecting and secondarily radiating energy emitted by the antenna; and the radiation slot is communicated with the connecting gap to form a secondary radiation system, so that radiation energy is collected and transferred, mutual interference between the two antennas is effectively reduced, and the isolation degree is improved. Besides, a virtual feeding point is arranged in the radiation slot area and at the edge position of the connecting slot, and the virtual feeding point and the radiation slot area work cooperatively, so that the performance of the antenna is optimized jointly, and the radiation efficiency is improved.

a primary detector (16; 16a); irradiating the object with primary radiation (20; 20a) by the primary radiation source; detecting the primary radiation by the primary detector during each of a plurality of primary active periods (76; 76a), the primary radiation having interacted with the object; and irradiating the object with secondary radiation (24; 24b) by the secondary radiation source in secondary pulses (80; 80b) irradiated during a plurality of primary inactive periods (78; 78a), each primary inactive period being interleaved with a primary active period; no secondary pulses are irradiated during the primary active periods; and during each primary inactive period, the primary detector is inactive with respect to capturing incident radiation during the primary inactive period.

A method for carrying out an X-ray imaging process based on X-ray radiation includes: detecting a primary radiation overlaid with secondary radiation in a region of a detector directly irradiated by the X-ray radiation; detecting a secondary radiation in an outer region of the detector outside of the directly irradiated region; automatically determining an irradiation parameter dependent upon the detected primary radiation and the detected secondary radiation; and carrying out the X-ray imaging based on the irradiation parameter.

A radiation containment component for sealing a microcatheter used to deliver a mixed particulate from a delivery device to a delivery line connector of the device may include proximal and distal ends. The proximal end is configured to connect to and cover, at a connector fastening point, a distal portion of the line connector, the distal portion including a distal connector end, the line connector configured to receive the mixed particulate from the device. The distal end is configured to be disposed over and connect, at a catheter fastening point, to a proximal portion of the microcatheter connected to the line connector, the proximal portion including a proximal microcatheter end. The distal connector end is configured to be connected at a connection point to the proximal microcatheter end. The connection point is disposed between the connector fastening point and the catheter fastening point within and sealed by the component.

The invention relates to a method for generating a plasma (12) of a target material (14) for generating secondary radiation (16), in particular for generating EUV light, and / or for mediating a nuclear fusion reaction, wherein the method has a step of generating (S1) an excitation light beam (24) and a step of amplifying (S2) the excitation light beam (24) in order to form an amplified excitation light beam (46). Furthermore, the method has a step of producing (S3) a plurality of units (18) of the target material (14) and a step of exciting (S4) at least one unit (18) of the target material (14) using the amplified excitation light beam (46) and thereby generating the plasma (12) of the target material (14) in particular. According to the invention, the method has a step of modulating the excitation light beam (24) and / or the amplified excitation light beam (46) in such a way that a specified target trajectory (62) is set for the excited unit (18) of the target material (14) and / or at least one other unit. The invention further relates to a laser system (10) and to a method for producing microchips or semiconductor intermediate products.