201 results about "Line radiation" patented technology

The invention relates to a forward millimeter wave radar antenna. The antenna comprises a body, a wide-beam waveguide antenna, a narrow-beam waveguide antenna and waveguide transmission channels, wherein the wide-beam waveguide antenna, the narrow-beam waveguide antenna and the waveguide transmission channels are integrated in the body; the waveguide transmission channels comprise a first waveguide transmission channel and a second waveguide transmission channel; the wide-beam waveguide antenna comprises a polarization conversion structure; the antenna unit comprises a first antenna radiation cavity, a first slot radiation slot and a first opening horn which are connected in sequence, and the polarization conversion structure is connected with the first antenna radiation cavity; a first choke groove; the narrow-beam waveguide antenna comprises a splitter which is connected with the second waveguide transmission channel; the antenna structure array comprises a plurality of sub-antenna structure units, and each sub-antenna structure unit comprises a second antenna radiation cavity, a second slot radiation slot and a second opening horn which are connected in sequence; and the second choke groove is arranged beside the antenna structure array. According to the invention, the requirements of short-distance wide-angle coverage and long-distance high-precision detection are met, and the production cost is reduced.

The invention belongs to the field of electromagnetic numerical methods, and relates to a rapid simulation solving method for radiation characteristics of a large-scale array antenna. In the simulation solution process of the large-scale array antenna, a regional decomposition technology is adopted: firstly, m * n antenna units in the center of the large-scale array antenna are selected as small-scale array antennas; then, establishing a unit model of an antenna array, and performing corresponding simulation solution for a small-scale array antenna according to the arrangement of the array; thirdly, constructing a matrix equation for finite element region decomposition solution, and obtaining a far field of the small-scale antenna array through matrix multiplexing simulation solution; further, a far field of a large-scale array antenna is expanded; and finally, obtaining a radiation far-field parameter result of any amplitude phase distribution by changing feed source parameters of the large-scale array antenna excitation unit according to actual requirements. According to the method, the radiation characteristics of the large-scale array antenna can be quickly simulated and analyzed only by carrying out actual simulation calculation on a small-scale antenna array.

The invention discloses a broadband dual-circularly-polarized low-cost phased-array antenna array element, which comprises an antenna radiation structure and a slot feed structure which are arranged independently from each other, and is characterized in that the antenna radiation structure comprises a parasitic radiation layer, a first dielectric substrate, an excitation radiation layer and a second dielectric substrate which are arranged in a laminated manner; the slot feed structure comprises a slot layer, a third dielectric substrate, a strip-shaped transmission line and a fourth dielectric substrate; the antenna layer structure and the slot feed structure realize electromagnetic coupling transmission through the slot layer; a hollow symmetrical structure is arranged in the middle of the first dielectric substrate, and the hollow part is used as an air medium to reduce dielectric loss; the gap layer is provided with a multidirectional coupling gap structure; the strip-shaped transmission line is provided with at least two feed ports, and dual circularly polarized radiation is formed in the antenna layer structure through excitation of different feed ports. The antenna radiation layer has no metal through hole or blind hole, can be processed in a layered manner, has the advantages of low processing cost and high yield, and ensures impedance bandwidth while realizing dual circular polarization.

The invention discloses a low RCS broadband array antenna based on modification processing and a wave absorbing material and a design method of the low RCS broadband array antenna. The design method comprises the following steps: firstly, designing an ultra-wideband Vivaldi antenna working in an X wave band; then analyzing the radiation and scattering surface current distribution of the antenna in the X wave band, and carrying out shaping processing on the antenna according to a simulation result; performing array design on the designed antenna to form an array antenna; and finally, analyzing the surface current in the radiation and scattering states of the array antenna, covering a higher scattering current area with a wave absorbing material, and reserving a high radiation current area of an antenna slot line area so as to reduce the RCS and reserve the radiation performance of the antenna. The low RCS broadband array antenna is designed by adopting the design method. According to the invention, the design requirements of high gain, high directivity and low RCS of the broadband array antenna are met, the effects of in-band RCS reduction, radiation performance maintenance and multi-angle reduction are considered, and the application of the antenna is expanded.

The invention discloses a phase-free antenna measurement method, a phase-free antenna measurement system and a storage medium. The phase-free antenna measurement method comprises the following steps: constructing a measurement system comprising an antenna to be measured, a measurement probe, a fixed auxiliary reference antenna and software defined radio; the probe is controlled to move and sample on the scanning plane, and the SDR synchronously collects receiving signals of the probe and the reference antenna; based on the frequency domain transformation result of the two paths of signals, the radiation field amplitude of each sampling point and the relative phase relative to the reference antenna are directly calculated through non-iterative operation, so that complete complex electric field distribution on the scanning plane is reconstructed; and finally, obtaining a far-field directional diagram through near-field-far-field transformation. The fixed reference antenna is introduced to serve as a phase reference, synchronous acquisition and direct calculation are achieved in combination with the SDR, the antenna radiation field can be rapidly and accurately recovered without direct phase measurement or complex iteration in the single scanning plane and single scanning process, and the method has the advantages of being simple in system, high in measurement efficiency and high in signal drift resistance.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The invention belongs to the technical field of radioactive metal isotope ion chromatographic separation, and discloses a medical radioactive isotope purification multichannel ion liquid chromatography system. The system comprises an automatic sample injection system, a parallel sampling and leaching channel, a parallel multi-column chromatographic structure, an online radiation dose monitoring module, a multi-channel tail end detection system, a recycling structure and a central control system. By adopting a full-automatic sample injection and multi-channel parallel chromatography structure, parallel separation, real-time radiation monitoring, multi-mode online detection and closed-loop recovery are realized, and the problems of insufficient nuclear purity, low separation efficiency, low target recovery rate and high radiation exposure of a traditional method are solved.

The invention relates to the field of large-spacing array antenna design optimization, in particular to a low-sidelobe large-spacing array antenna amplitude and phase design optimization method. Amplitude and phase values are randomly distributed for each large-spacing array element, the variation ranges of the amplitude and phase values are set, and a series of large-spacing array antenna radiation patterns with different characteristics can be generated through the random amplitude and phase combination, so that the large-spacing array antenna radiation pattern is more uniform in radiation. The rich radiation pattern data form a training data set of a neural network model, then the neural network model is trained through the obtained data set, and after training is completed, the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is input into the trained neural network model, so that the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is obtained. And outputting the optimized amplitude and phase distribution by the neural network model. The method is suitable for optimizing the design of the large-spacing array antenna.

The invention relates to the technical field of airship control, in particular to a floating aircraft control method and system oriented to an extreme environment. The control method comprises the following steps that environment parameters and running state data of the floating aircraft are collected in real time through a multi-mode sensor, and the environment parameters comprise the air speed of the stratosphere or under the stratosphere, the ultraviolet radiation intensity, the external temperature gradient and the air pressure fluctuation value; the operation state data comprises an air bag sealing index, propeller output power, a counterweight slide rail position and the residual capacity of the energy storage unit. Through the dynamic pressure compensation and self-repairing technology, the problem of sealing failure of the floating aircraft in an extreme environment is solved; and multi-mode wind resistance control and hybrid energy optimization are combined, so that the flight path precision and the cruising ability are remarkably improved.

The invention discloses a plasma welding auxiliary device for water pump shell production, and relates to the technical field of welding auxiliary equipment. The air pressure difference data, the weight data and the tension data are simultaneously collected through the analysis module, and the actual mass of the filtered matter on the surface of the filter screen is accurately calculated in combination with the weight change of the residue collection box after shutdown, so that compared with a traditional judgment mode which only depends on the air pressure difference, the interference factor of'abnormal air pressure difference caused by airflow fluctuation 'can be eliminated, and the judgment accuracy is improved; the air pressure difference change caused by unit filtering capacity is calculated, the threshold value is not a fixed value and is dynamically adjusted according to historical filtering data, and misjudgment caused by working condition change is avoided; and the analysis module incorporates four parameters of light radiation intensity, gas flow rate, temperature and humidity into a sterilization rate formula, when abnormity occurs in the welding process, the abnormity of the sterilization rate can be found in time, the required light radiation intensity is calculated and adjusted, and the sterilization rate is guaranteed.

This antenna module comprises radiation elements (121, 126), an RFIC (110), a switch (105) for selecting one of the radiation elements, and power feeding wires (141, 142, 143, 145, 210). The radiation element (126) receives a high-frequency signal in a first frequency band and radiates radio waves. The radiation element (121) receives a high-frequency signal in a second frequency band higher than the first frequency band and radiates radio waves. The RFIC converts the high-frequency signal in the first frequency band into the high-frequency signal in the second frequency band. The power feeding wires (143, 210) transmit the high-frequency signal in the first frequency band to the switch. The power feeding wire (145) transmits the high-frequency signal in the first frequency band from the switch to the radiation element (126). The power feeding wire (142) transmits the high-frequency signal in the first frequency band from the switch to the RFIC. The power feeding wire (141) transmits the high-frequency signal in the second frequency band converted by the RFIC to the radiation element (121).

The invention belongs to the technical field of wind turbine blade surface treatment, and particularly relates to a bionic blade surface protection method. According to the method, the durability and the fatigue resistance of the bionic blade are effectively improved through the steps of surface cleaning, roughening treatment, protective coating coating, reinforcement treatment, detection and the like. The method includes: using a high-pressure water gun to clean blade surfaces; carrying out surface roughening treatment by adopting a sand blasting process; coating a protective coating consisting of epoxy resin, nano silicon dioxide, graphene and the like; carrying out surface protection layer reinforcement treatment by using ultraviolet curing resin; and finally, detecting the thickness, the adhesive force and the wear resistance of the protective layer. The bionic blade treated through the method shows good durability and anti-fatigue performance in actual operation, erosion of external factors such as ultraviolet radiation, wind sand abrasion and rain wash can be effectively resisted, the service life of the blade is prolonged, and the operation reliability and economical efficiency of a wind turbine are improved.

The invention discloses a metal truss antenna housing and a design method thereof, and belongs to the field of radar antennas. In order to solve the problem that an antenna radiation pattern of an existing antenna housing is seriously distorted, the metal truss antenna housing comprises a metal framework and a skin arranged on the surface of the metal framework, the metal framework is of a truss structure, and a first section of at least part of rod pieces in the metal framework comprises a connecting part. The reflecting part is connected with the connecting part; the reflecting part is used for realizing non-mirror scattering between a reflected wave and the first cross section of the partial rod piece; the connecting part is used for realizing the connection between the rod pieces, and the first cross section is the cross section of one side, facing the antenna, of the rod piece. According to the metal truss, mirror reflection is converted into non-mirror scattering through the arrangement of the reflection part, so that distortion of an antenna pattern is effectively suppressed, particularly, raising of a far-region minor lobe level and loss of main lobe gain are reduced, and meanwhile, the original high-strength advantage of the metal truss is completely reserved through the arrangement of the connection part.

The application discloses a dual-polarized microstrip patch antenna applied to a millimeter wave phased array, and belongs to the field of radio frequency front ends.The antenna mainly comprises two substrates and two patch structures, wherein the top patch is fed by two coaxial probes, the feeding port has two feeding slits, and the bottom patch is in a cross shape, which increases the cross-polarization ratio of the dual-polarized antenna radiation.The antenna realizes the dual-polarized characteristic at H plane + / -45 DEG, the 10dB relative bandwidth is 38.9%, and the radiation pattern half-power beam width is greater than 100 DEG. The antenna has the characteristics of simple structure and simple manufacturing, and can be rapidly printed and manufactured by adopting a planar microstrip structure.

The application discloses a kind of multi-physical field antenna radiation characteristic inversion method and device, wherein the method includes: constructing the test platform including reflecting surface, variable temperature source and feed receiving calibration system, and it is placed in vacuum environment, by actively heating reflecting surface and using feed receiving calibration system to carry out continuous calibration.Based on the system output brightness temperature after calibration, the known emissivity at reference normal temperature is used to correct the self-radiation contribution of reflecting surface, and the brightness temperature residual after self-radiation correction is calculated. From the heating process, select multiple time points where the weighted temperature of the reflecting surface is in a stable state, and extract the brightness temperature residual corresponding to the multiple time points. With the emissivity at the reference normal temperature as the benchmark, combined with the brightness temperature residual data at each stable temperature point and the corresponding reflecting surface weighted temperature, the actual emissivity of the reflecting surface at each temperature point is calculated. Therefore, the application solves the problem of accurately inverting the temperature characteristics of the emissivity of the reflecting surface in a vacuum environment.

The application discloses a high-gain dual-polarized wideband horn antenna and relates to the technical field of horn antennas for communication. The horn antenna comprises an antenna body, a radiation aperture extension cylinder is fixed at a horn opening of the antenna body, a first conical cavity is formed in an inner cavity of the antenna body, a second conical cavity is formed in an inner cavity of the radiation aperture extension cylinder, a right end opening of the first conical cavity is matched with a left end opening of the second conical cavity, and an opening angle of the first conical cavity is consistent with an opening angle of the second conical cavity. The horn antenna has high radiation efficiency and can realize wideband and high gain in the smallest size.

The application discloses a millimeter wave single-layer broadband inclined phased array antenna, which comprises a dielectric substrate (14), a first antenna radiation unit (1), a second antenna radiation unit (2), a third antenna radiation unit (3) and a fourth antenna radiation unit (4) formed by top and bottom metal layers (13) and (15) arranged on two sides of the dielectric substrate; the four antenna radiation units are arranged in an array in a one-dimensional direction and are arranged in a 1*4 linear array in a horizontal direction of an H plane; equal-amplitude and unequal-phase feed is input into feed ports of the four antenna radiation units to obtain the beam scanning characteristic of the H plane of the antenna array; and the antenna array uses a technical means of superimposing a broadside beam and an end-fire beam to realize a stable 45-degree inclined beam in a wide working frequency band. In addition, equal-amplitude and unequal-phase feed is provided for the feed ports of the first to fourth radiation units to obtain the beam scanning characteristic of the H plane.

This invention relates to the field of electromagnetic fields and microwave technology, aiming to solve the problems of traditional orthogonal short-circuit dual-wire baluns, which suffer from strong jumper inductance effects, large dual-wire radiation, and severe pattern distortion above 5GHz. The planar orthogonal differential feed network also suffers from high network losses and manufacturing costs, making it unsuitable for widespread use in electronic devices above 5GHz. The invention provides a dual-polarized back-cavity radiator, including a reflective cavity enclosure component forming an inner reflective cavity and a ring reflective cavity. An orthogonal printed composite oscillator is disposed within the inner reflective cavity, comprising horizontal and vertical printed composite oscillators, with oscillator plates connected to both sides of each oscillator. Each printed composite oscillator integrates a dual-wire balun, impedance compensation lines, and open-circuit compensation sections. Each printed composite oscillator includes a printed oscillator with front, back, and mezzanine circuits. The impedance compensation lines and open-circuit compensation sections are embedded within the printed oscillator and connected to the mezzanine circuits. The dual-wire balun includes parallel dual wires connected to the front and back circuits.

The utility model discloses a full-wave oscillator unit and an antenna. The full-wave oscillator unit comprises a bottom plate, an oscillator support and an antenna radiation oscillator, the antenna radiation oscillator is arranged on the front surface of the bottom plate, the antenna radiation oscillator and the bottom plate are arranged in parallel up and down, and the antenna radiation oscillator is supported by the oscillator support on the bottom plate; wherein two oscillator arms in the 45-degree direction and the-45-degree direction of the antenna radiation oscillator form a crisscross dual-polarized radiation unit. The antenna provided by the utility model has the characteristics of high gain, low cost and simple structure. The antenna mainly covers a relatively wide working frequency band of 698MHZ-960MHZ, and the relative bandwidth reaches 32%; the radiation gain of 9-10db is realized by the unit oscillators; a plurality of unit oscillators form an array antenna to realize broadband and high gain performance; through printed board processing, the size consistency is improved; the assembly structure is simple, and production efficiency is improved.

The present application relates to a kind of microphone and infrared thermal imaging combined positioning cable fault positioning method and system.The present application detects heat source due to abnormal discharge by infrared thermal imager.Infrared radiation all carries the characteristic information of object, after the power signal radiated by the heating site of object is converted into electric signal by photoelectric infrared detector, imaging device can simulate the spatial distribution of object surface temperature, finally, after system processing, form thermal image video signal, just obtain the thermal image corresponding to object surface heat distribution.The system is composed of infrared thermal imager and display two parts, infrared thermal imager is by non-contact detection infrared energy, and it is converted into electric signal after signal amplification and processing, generates thermal image, shows temperature distribution in space in the form of image, obtains spatial infrared thermal imaging chart.The present application reduces imaging range, reduces calculation amount;Make the accuracy of detection greatly improve real-time performance, system is simple and easy to realize.

The invention discloses a detachable cover assembly, a cover body and an electric heating pressure cooking utensil, the detachable cover assembly comprises a cover plate and a radiant panel, the lower surface of the cover plate forms the upper top surface of a pressure cooking cavity, the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated, the radiant panel is connected to the side, facing the pressure cooking cavity, of the cover plate, and the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated. And a gap through which gas can pass is formed between the upper surface of the radiant panel and the lower surface, forming the upper top surface of the pressure cooking cavity, of the cover plate. According to the pressure cooking device, the radiant panel generating infrared rays is arranged in the pressure cooking cavity, gas in the pressure cooking cavity can flow in the gap between the radiant panel and the cover plate, the radiant panel can be prevented from bearing pressure, and the technical problem that the pressure bearing effect of materials of the radiant panel is poor due to the fact that the peripheral side of the radiant panel is not evenly pressed in all directions can be solved.

The application relates to a forward millimeter wave radar antenna. The application comprises a body and a wide-beam waveguide antenna, a narrow-beam waveguide antenna and waveguide transmission channels integrated in the body, wherein the waveguide transmission channels comprise a first waveguide transmission channel and a second waveguide transmission channel; the wide-beam waveguide antenna comprises a polarization conversion structure; an antenna unit comprises a first antenna radiation cavity, a first slot radiation groove and a first open horn connected in sequence, and the polarization conversion structure is connected with the first antenna radiation cavity; a first choke groove; the narrow-beam waveguide antenna comprises a splitter connected with the second waveguide transmission channel; an antenna structure array comprises a plurality of sub antenna structure units, each of which comprises a second antenna radiation cavity, a second slot radiation groove and a second open horn connected in sequence; and a second choke groove is arranged on the side of the antenna structure array. The application realizes the requirements of close-range wide-angle coverage and long-distance high-precision detection, and reduces the production cost.

The invention relates to the technical field of wireless communication, in particular to an antenna radiation unit and an antenna, the antenna radiation unit comprises a radiation unit body and a phase adjusting structure arranged above the radiation unit body, and the phase adjusting structure is a metal ring array formed by arranging a plurality of metal ring units in an array mode. The spherical wave conversion module is used for converting the spherical wave emitted by the radiation unit body into a plane-like wave to realize beam convergence; the metal ring array is composed of multiple stages of metal ring sub-arrays which are concentrically arranged, the sizes of the metal ring units of all stages from inside to outside are gradually increased, the electromagnetic wave phase can be accurately regulated and controlled, spherical waves are converted into plane-like waves, beam broadening and narrowing can be effectively achieved while S parameters are not affected, the requirements of different wave widths are met, and the application range is wide. The performance of the radiation unit is improved, and the antenna directivity and radiation efficiency are significantly improved.

The utility model discloses a detachable cover assembly, a cover body and an electric heating pressure cooking utensil, the detachable cover assembly comprises a cover plate and a radiant panel, the lower surface of the cover plate forms the upper top surface of a pressure cooking cavity, the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated, the radiant panel is connected to the side, facing the pressure cooking cavity, of the cover plate, and the radiant panel is used for radiating infrared rays to the pressure cooking cavity after being heated. And a gap through which gas can pass is formed between the upper surface of the radiant panel and the lower surface, forming the upper top surface of the pressure cooking cavity, of the cover plate. According to the pressure cooking device, the radiant panel generating infrared rays is arranged in the pressure cooking cavity, gas in the pressure cooking cavity can flow in the gap between the radiant panel and the cover plate, the radiant panel can be prevented from bearing pressure, and the technical problem that the pressure bearing effect of materials of the radiant panel is poor due to the fact that the peripheral side of the radiant panel is not evenly pressed in all directions can be solved.

An objective of the present invention is to provide a photosensitive organic insulating composition having sufficient absorption, even of i-line radiation, as a photosensitive organic insulating composition that has little influence on device reliability and that is capable of forming a gate insulating film for transistors. An objective of the present invention is also to provide a gate insulating film and a transistor. A photosensitive organic insulating composition according to one embodiment of the present invention contains a chalcone compound and polyvinyl cinnamate.

The present invention discloses a method for predicting the near-field radiation of an array antenna based on polarization vector synthesis, comprising the following steps: 1) constructing a unit characteristic characterization matrix for the antenna units of the array antenna; 2) constructing an array configuration description matrix for the array antenna based on the unit characteristic characterization matrix; 3) setting array frequency, radiation power, and radiation efficiency parameters; 4) projecting the source polarization vector from the unit local coordinate system to the array global coordinate system; 5) calculating the projection of the source polarization vector at the field point based on the position of the field observation point; 6) decomposing the projection of the source polarization vector at the field point to calculate the horizontal polarization coefficient and the vertical polarization coefficient; 7) calculating the horizontal polarization field, the vertical polarization field, and the total field at the field point. By adopting an analytical calculation model for the radiation field based on polarization vector synthesis, the present invention achieves higher computational efficiency in predicting the near-field radiation of an array antenna compared to the full-wave method.

The invention provides an ultra-wideband transparent antenna, which relates to the technical field of antennas and comprises an antenna radiation patch, a floor and a dielectric substrate, the floor is located on the first end face of the dielectric substrate; the antenna radiation patch is arranged on the second end surface of the dielectric substrate; the dielectric substrate is made of soda-lime glass; the antenna radiation patch comprises a first rectangular unit, a second rectangular unit, a third rectangular unit, a first field-shaped unit, a second field-shaped unit, a first triangular unit and a second triangular unit; the first rectangular unit is connected with the microstrip feeder; a plurality of rectangular grooves are formed in the first rectangular unit; according to the invention, the cooperation of high light transmission, ultra wide band coverage, stability and reliability is realized.

The application belongs to the cross field of radiation safety monitoring and Internet of Things technology, and particularly relates to a low-power consumption Mesh distributed radiation intelligent monitoring system based on a double GM tube adaptive fusion algorithm. In order to solve the defects of the wireless radiation monitoring system, such as limited communication distance, limited node quantity, poor network reliability and the like, the application adopts a low-power consumption Bluetooth Mesh network (BLE Mesh) architecture, integrates a double-channel Geiger-Muller (GM) tube radiation detector, a sliding window CPM algorithm, an adaptive range selection and weighted fusion algorithm, an intelligent multi-level alarm mechanism and a remote dynamic configuration function, and realizes large-range, multi-node, self-organizing network, low-power consumption distributed ionizing radiation real-time monitoring and intelligent early warning.

In one aspect, the disclosure relates to a method for neuromodulation in a target, wherein the target can be an isolated plurality of cells, an isolated organ, or an animal subject In an aspect, the method includes at least the step of delivering X-ray radiation to one or more neurons in the target, wherein the one or more neurons express dTRPA1(A)10b, and wherein the X-ray radiation generates H2O2 via radiolysis of water. In a further aspect, the H2O2 can increase intracellular calcium ions which can, in turn, stimulate the release of neurotransmitters. Also disclosed are treatments of diseases, disorders, and symptoms thereof using the disclosed method.