24 results about "Square array" patented technology

The invention relates to the technical field of wireless communication and sensing, and particularly discloses a holographic amplitude weighting-based two-dimensional antenna array multi-beam scanning method, which comprises the following steps of: determining the position information of each radiation unit in a two-dimensional antenna array, including calculating the interval and the arrangement mode of the units; an amplitude weighted value of each radiation unit is generated according to the target wave direction, a two-dimensional multi-beam holographic amplitude weighting technology is used, and the radiation unit amplitude weighted values are determined through the two-dimensional multi-beam holographic amplitude weighting technology; generating a corresponding binary discretization coding sequence based on the amplitude weighted value so as to control the excitation amplitude of each radiation unit; and designing a liquid crystal-based Ka-band two-dimensional holographic beam scanning leaky-wave antenna square array, and regulating and controlling a radiation pattern of a two-dimensional antenna array through the coding sequence to realize multi-beam scanning.

A deep-learning-based method for eliminating a broadband effect and a synthesized-beam effect in low-frequency Square Kilometre Array (SKA) is provided. The method includes: establishing a frequency-domain extraction module, a feature enhancement module, and a frequency-domain gating module; constructing, based on the frequency-domain extraction module, the feature enhancement module, and the frequency-domain gating module, a neural network model based on a frequency-domain self-attention mechanism; performing primary feature extraction on an input image based on the feature enhancement module to obtain a low-level feature; inputting the low-level feature into the frequency-domain gating module and performing downsampling to achieve feature encoding, so as to obtain an encoded feature; inputting the encoded feature into the frequency-domain extraction module and performing frequency-domain attention computation and upsampling to achieve feature decoding, so as to obtain a decoded feature; and inputting the decoded feature into the feature enhancement module to obtain a target restored image.

The invention provides an ultra-wideband antenna structure. The ultra-wideband antenna structure comprises a plurality of first antenna layers, a plurality of second antenna layers and a ground layer, each first antenna layer and each second antenna layer are formed by sequentially arranging a plurality of antenna units at intervals; the first antenna layer and the second antenna layer are vertically arranged to form a square array, and a gap between the antenna units of the first antenna layer is inserted into a gap between the antenna units of the corresponding second antenna layer; the ground layer is made of a flexible material; the first antenna layer and the second antenna layer are fixedly arranged on the ground layer; the sides, facing the ground layer, of the adjacent antenna units are connected through the flexible connecting pieces, the ground layer made of flexible materials is adopted to fit the installation face, meanwhile, gaps exist between the adjacent antenna units of the first antenna layer and the second antenna layer, and when the ground layer bends, the shape of the ground layer is fitted, so that the installation face is more flexible. And the conformal installation capability of the ultra-wideband antenna structure provided by the invention during installation is greatly improved.

The application relates to the field of wireless communication and sensing technology, and particularly discloses a two-dimensional antenna array multi-beam scanning method based on holographic amplitude weighting, which comprises the following steps: determining the position information of each radiation unit in the two-dimensional antenna array, including calculating the unit spacing and arrangement mode; generating the amplitude weighting value of each radiation unit according to the target wave direction; using the two-dimensional multi-beam holographic amplitude weighting technology, the amplitude weighting value of the radiation unit is determined through the two-dimensional multi-beam holographic amplitude weighting technology; generating the corresponding binary discretization coding sequence based on the amplitude weighting value to control the excitation amplitude of each radiation unit; designing a Ka-band two-dimensional holographic beam scanning leaky-wave antenna square array based on liquid crystals, and the radiation pattern of the two-dimensional antenna array is regulated and controlled through the coding sequence to realize multi-beam scanning.

A system and method for generating three-dimensional (3D) images using sonar technology comprises a circular phased array to create 3D point clouds from the echoes of a single sonar ping and may be configured to measure Doppler shift. The circular phased array is a circular receiver array that is combined with a single, wide opening angle projector that transmits at least one pulse of acoustic energy. The echoes from this pulse are received by the circular array. The signals from the receiver elements are combined using Delay and Sum beamforming processes to perform spatial filtering with resolution as discussed above. The system and method combine advantages of Mills Cross systems and square arrays, providing high-resolution, instantaneous 3D imaging employing a 1D array, leading to a more efficient and scalable design.

The utility model relates to a dual-frequency bipolar integrated oscillator spotlight antenna device, which comprises a fixed seat, four low-frequency-band half-wave dipoles which are connected with the outer ring of the fixed seat, are arranged in a square array and are positioned on the front surface of the fixed seat, and four high-frequency-band single dipoles which are connected with the inner ring of the fixed seat, are arranged in a square array and are positioned on the front surface of the fixed seat, the two low-frequency-band coaxial cables are respectively connected with the two groups of low-frequency-band half-wave dipoles at the diagonal positions and are positioned on the back surface of the fixed seat; and the two high-frequency-band coaxial cables are respectively connected with the two groups of high-frequency-band single dipoles at the diagonal positions and are positioned on the back surface of the fixed seat. According to the utility model, the four low-frequency-band half-wave dipoles and the four high-frequency-band single dipoles are integrated, the structure is simple, the occupied space is small, the assembly is convenient, the consistency is good, and the production efficiency is high; in addition, through the reasonable oscillator balun structure design, the coupling between the high-frequency oscillator balun and the low-frequency oscillator balun is small, and the antenna can obtain the electrical performance index advantages of high isolation, high gain and the like.

According to the photovoltaic power generation array optimization layout and earth-rock volume calculation method, the optimal inclination angle and orientation of the photovoltaic array are solved based on the sky scattered radiation anisotropy model, and it is ensured that solar radiation is received to the maximum extent; the optimal spacing of the photovoltaic arrays in different sites is determined by establishing a space solid geometric model, and shadow shielding is avoided; and with the maximum generating capacity as a target, establishing a nonlinear programming model to solve the optimal photovoltaic panel and laying mode. Meanwhile, the DEM cross fusion method fusing the regular grid method and the triangulated irregular network method is adopted to estimate the earth-rock volume, and the calculation precision and applicability are improved. Besides, various actual factors such as ground reflectivity, system comprehensive efficiency and the like are also considered, and comprehensive optimization of site leveling, photovoltaic panel model selection and matrix arrangement and installation in the photovoltaic power station construction process is realized by optimizing model selection mathematical modeling. The method has remarkable advantages in photovoltaic array layout optimization, earth-rock volume estimation and a comprehensive layout scheme.

This invention provides a miniaturized high-pulse-energy Raman laser under vortex optical pumping conditions, relating to the field of Raman laser technology, and employing n 2 A square array of vortex phase plates serves as the optical element for generating vortex-pumped lasers. By adjusting parameters such as the topological charge of the array of vortex phase plates and the focal length of the array of short-focal-length lenses, the laser power density in the focal region is reduced. The focal region has n 2 A square array is arranged with ring-shaped light intensity distribution units, ensuring that the laser power density of each unit in the focal region is greater than the Raman laser generation threshold and less than the laser-induced breakdown threshold. Therefore, the total Raman laser energy is n times the Raman laser energy generated by each unit. 2 This technology ultimately enabled the output of high-energy, high-beam-quality Raman lasers, with Raman laser pulse energies reaching hundreds of millijoules or even joules.

A system and method for generating three-dimensional (3D) images using sonar technology comprises a circular phased array to create 3D point clouds from the echoes of a single sonar ping and may be configured to measure Doppler shift. The circular phased array is a circular receiver array that is combined with a single, wide opening angle projector that transmits at least one pulse of acoustic energy. The echoes from this pulse are received by the circular array. The signals from the receiver elements are combined using Delay and Sum beamforming processes to perform spatial filtering with resolution as discussed above. The system and method combine advantages of Mills Cross systems and square arrays, providing high-resolution, instantaneous 3D imaging employing a 1D array, leading to a more efficient and scalable design.

The invention belongs to the technical field of semiconductor photoelectric detectors, and discloses a silicon carbide micro-lens array and a preparation method thereof.The silicon carbide micro-lens array takes a silicon carbide substrate as a base material, a micro-lens array pattern with a high fill factor is formed on the base material, the micro-lens array pattern comprises square array patterns distributed in an array mode, and the square array patterns are arranged on the silicon carbide substrate. A convex microlens is formed in each square pattern. The optical imaging lens has a high optical fill factor and a thin substrate thickness, the light receiving view field range is greatly expanded, and the optical imaging lens has better optical signal focusing capability.

The application provides a square-shaped heterostructure terahertz metamaterial sensor device and a preparation method thereof. The device comprises a heterostructure sandwich structure which is formed by constructing a multilayer structure on a silicon material. The multilayer structure is composed of a top metal square array unit, a middle dielectric layer and a bottom metal reflection layer. The sensor device controls the full width at half maximum of the plasmonic resonance peak by adjusting the thickness of the dielectric layer to achieve wide resonance enhancement. The metal square array unit adopts two structure size parameters, and the overall architecture scaling realizes the spectral response of different wave bands. When the sensor device works, the terahertz wave is vertically incident on the heterostructure sandwich structure and induces the excitation of the plasmonic mode, so that the signal of the outgoing terahertz wave received by the terahertz receiver presents the super-wideband resonance characteristic. The application can control the spin coating speed of photoresist to customize the wide-spectrum resonance characteristic of the plasmon excited by the square-shaped heterostructure terahertz metamaterial under two different structure scales.

This invention belongs to the field of electronic functional materials technology, specifically relating to an integrated stealth and electrothermal composite structure. It includes, from bottom to top, a conductive reflective layer, an insulating layer, a resistance wire and a wave-transparent dielectric puncture composite layer, and a surface wave-transparent layer. The resistance wire and wave-transparent dielectric puncture composite layer is an M×M array structure composed of alternating coded structural units I and II. Coded structural unit I is a square array structure composed of multiple resistance wires I arranged parallel to each other on the surface of the wave-transparent dielectric, and coded structural unit II is a square array structure composed of multiple resistance wires II arranged parallel to each other on the surface of the wave-transparent dielectric. Resistance wires I and II are perpendicular. M is an even number. Coded structural units I and II have the same size and equal number. Resistance wires I and II have the same size. This invention has a simple structure, is compatible with conventional composite material structures, and solves the problem of integrating stealth and electrothermal functions.

The application discloses a multi-angle light tracking large-area photovoltaic power generation system, which comprises a photovoltaic panel square array and multi-angle light tracking support modules; the multi-angle light tracking support modules are arranged in a matrix form and a part of the multi-angle light tracking support modules are provided with active telescopic driving force; in the south-north light tracking state, the multi-angle light tracking support modules provided with the active telescopic driving force and responsible for the south-north light tracking drive the whole photovoltaic panel square array to rotate around a south-north rotating center, and the south-north rotating center is formed by a group of the multi-angle light tracking support modules arranged in the direction parallel to the latitude of the earth; in the east-west light tracking state, the multi-angle light tracking support modules provided with the active telescopic driving force and responsible for the east-west light tracking drive the whole photovoltaic panel square array to rotate around an east-west rotating center. The photovoltaic power generation system not only has the large-area photovoltaic panel arranged in the matrix form, but also can track the light in multiple angles, and has the advantages of high power generation efficiency, simple structure, low cost and the like.

The present invention discloses a square array electromagnetic detection and routing positioning method for submarine cables. The method comprises: detecting the position information of a mother ship through a surface positioning system; detecting the electromagnetic signal of the submarine cable through a submarine cable detection system, detecting the vertical distance of the submarine cable detection and positioning platform relative to the seabed plane, the vertical distance relative to the sea level, and the bow deflection angle; detecting the position information of the submarine cable detection and positioning platform relative to the mother ship through an ultra-short baseline positioning system; using a submarine cable relative detection and positioning method to obtain the relative position information of the submarine cable and the square magnetic detector array; using a submarine cable absolute detection and positioning method to obtain the position information of the submarine cable, and realizing routing positioning of the submarine cable. In submarine cable detection operations, the method of the present invention can effectively improve the problems of the difficulty in accurately determining the relationship between the induction coil parameters and the induced electromotive force, inaccurate routing positioning, and improve the detection accuracy on the basis of reducing the complexity of the device.

The present invention relates to a transient electromagnetic pulse transmitting array antenna with high synthesis efficiency and an optimization method, belonging to the field of antenna technology. By using a Vivaldi antenna unit array, the number and spacing of the array antennas are optimized to make the array aperture nearly square, the path difference of the multi-path radiation pulses small, and the synthetic peak electric field in the far-field radiation field high. The antenna uses a dielectric substrate with a low dielectric constant, which reduces the transmission and radiation loss of transient electromagnetic pulses, thereby improving the synthesis efficiency. Compared with linear, rectangular or triangular array arrangements, with a nearly square array aperture, in the far-field radiation, the phase difference caused by the path difference of each antenna unit is smaller, the synthetic electric field is larger, and the synthesis efficiency is higher.

The application discloses a control method for multi-modal data acquisition of tumor in-situ pathological analysis, which is executed by a main controller, integrates a system of SC laser, DUV laser, multiplexing beam combiner, endoscopic fiber bundle, FAST fiber bundle and corresponding spectrometer, and realizes automatic acquisition and fusion of three kinds of spectral data. The method comprises the following steps: S1, controlling the SC laser to irradiate a detection point, and controlling the SC spectrometer to receive a reflected light signal and generate a first spectral data set; S2, controlling the DUV laser to irradiate the detection point, and controlling the DUV spectrometer to receive excited Raman and fluorescence signals and generate a second spectral data set; S3, controlling the polarized excitation light to irradiate the detection point, and controlling the SC spectrometer to receive the fluorescence signal and generate a third spectral data set; and S4, based on the first three kinds of data sets, reconstructing single-column signals at a near end of the FAST fiber bundle according to a far end square array arrangement to generate hyperspectral image data of the detection point. The method realizes automatic acquisition of in-vivo, in-situ and multi-dimensional chemical information.

The invention discloses a broadband metasurface antenna applied to Wi-Fi (Wireless Fidelity) 6E / 7. Comprising two dielectric substrates and three metal layers. The two dielectric substrates are Rogers 4003C, and the three metal layers are a radiation patch, a metal grounding plate and a microstrip line in sequence from top to bottom. The radiation patches are 4 * 3 square arrays, a cross groove is etched in the central radiation patch, the square patches are cut off along diagonal lines at the front edge patch and the rear edge patch, the centers of the left edge patch and the right edge patch are cut off along the transverse direction, and meanwhile the fan-shaped patches are placed at the four corners and cut off along the diagonal direction. A transverse groove is etched in the center of the metal grounding plate, and meanwhile a Y-shaped 50-ohm microstrip line is printed at the bottom of the lower substrate. According to the invention, it can be ensured that the antenna has a high gain, and at the same time, the antenna has a wide bandwidth covering the frequency bands of 5 GHz (5.15-5.825 GHz) and 6 GHz (5.925 GHz-7.125 GHz).

According to the multi-modal data acquisition control method for tumor in-situ pathological analysis, a main controller is used for executing, an SC laser, a DUV laser, a multiplexing beam combiner, an endoscopic optical fiber bundle, a FAST optical fiber bundle and a system of a corresponding spectrograph are integrated, and automatic acquisition and fusion of three kinds of spectral data are achieved. The method comprises the following steps: S1, controlling an SC laser to irradiate a detection point, receiving a reflected light signal by an SC spectrograph, and generating a first spectral data set; s2, controlling the DUV laser to irradiate the detection point, and receiving excited Raman and fluorescence signals by a DUV spectrometer to generate a second spectral data set; s3, controlling the polarized exciting light to irradiate the detection point, receiving a fluorescence signal by the SC spectrograph, and generating a third spectral data set; and S4, on the basis of the first three types of data sets, FAST optical fiber bundle near-end single-row signals are arranged and reconstructed according to a far-end square array, and hyperspectral image data of the detection points are generated. According to the method, automatic acquisition of in-vivo, in-situ and multi-dimensional chemical information is realized.

The utility model discloses a folded reflective array antenna using a novel planar feed source, which comprises a polarization torsion reflective array, a polarization grid, a plurality of nylon columns and the novel planar feed source used for transmitting linearly polarized waves, and the novel planar feed source is coplanar with the polarization torsion reflective array. The polarized torsional reflection array comprises a plurality of polarized torsional reflection units arranged in a square array, each unit comprises a metal layer, a first dielectric substrate and a first metal floor which are sequentially arranged from top to bottom, the metal layer is etched on the upper surface of the first dielectric substrate and is of a double-crack square ring stacked structure, and the first metal floor is of a double-crack square ring stacked structure. The double-crack square ring superposition type metal patch comprises a first crack square ring metal patch and a second crack square ring metal patch, openings of the first crack square ring metal patch and the second crack square ring metal patch are oppositely superposed to form a square closed structure in the center, and meanwhile, right-angle W-shaped structures symmetrically extend out of opposite angles of the square closed structure. Compared with the existing pyramid horn feed folding reflective array antenna, the folding reflective array antenna has the advantages that the compactness of the antenna is greatly improved, the profile of the antenna is reduced, and the folding reflective array antenna has the characteristics of wide band and high aperture efficiency and shows good application prospect.

A high-detection-efficiency long-wave infrared spectral imaging device and method, belonging to the field of micro-nano optical design, is disclosed. The scheme is as follows: a metasurface spectral modulation layer is composed of a square array of multiple metasurface periodic units arranged sequentially. Each metasurface periodic unit consists of multiple metasurface structural units, and each metasurface structural unit includes a substrate and several nanopillars. The nanopillars are distributed on the substrate in a C4 symmetrical structure. A particle swarm optimization algorithm is used to reverse-engineer the high-transmittance metasurface structural unit and obtain its structural parameters. Incident light is spectrally encoded by the metasurface spectral modulation layer. The encoded information is converted into electrical signals by the long-wave infrared focal plane detector pixels below. Combined with a deep neural network algorithm, a high-resolution long-wave infrared spectral image can be reconstructed. The spectral imaging method provided by this invention is perfectly compatible with semiconductor and MEMS processes, achieving high-detection-efficiency long-wave infrared spectral imaging.

This invention belongs to the field of UWB wireless positioning technology, specifically providing an ultra-wideband radar three-dimensional positioning method. First, a transceiver antenna array is constructed, with elements arranged in an N×N square array, where N is an odd number ≥ 3. A transceiver antenna is placed at the center of the array, and receiving antennas are placed on the other elements. Based on the transceiver antenna at the center of the array, the arrival time of the target echo signal is collected, starting from the feeding moment, and the transmit / receive time difference is calculated. Then, based on any three receiving antennas located at the four corners of the transceiver antenna array, the arrival time of the target echo signal is collected, and the relative time difference between the three receiving antennas is calculated. Based on the transmit / receive time difference and the relative time difference, the target position coordinates are calculated using a three-dimensional positioning model. In summary, this invention constructs a three-dimensional positioning mathematical model based on the radiation characteristics of an electromagnetic time domain (TEM) antenna array. This model can significantly reduce computational complexity while ensuring positioning accuracy.

This invention discloses a method for locating magnetic targets using a vector difference array. It employs eight vector magnetic sensors with aligned triaxial directions. Sensors 1, 2, 3, and 4 are located at the four vertices of square array 1; sensors 5, 6, 7, and 8 are located at the four vertices of square array 2. Sensor 7 is located at the geometric center of square array 1, and sensor 1 is located at the geometric center of square array 2. Sensors 1, 3, 5, and 7 are aligned in a straight line, and the diagonals of the two square arrays are of equal length. The eight vector magnetic sensors measure all information of the three components of the geomagnetic field and the geomagnetic tensor at the center of the two square arrays. The influence of the geomagnetic background field is eliminated through difference, achieving target location. This invention offers relatively high resolution, enabling accurate target location even under complex geomagnetic conditions. It requires fewer sensors and provides a simple and rapid solution.

The application discloses a C / Ku dual-frequency common-aperture phased array scanning antenna and relates to the technical field of scanning antennas, which comprises a Ku-band patch and a C-band antenna oscillator, wherein the Ku-band patch and the C-band antenna oscillator are both arranged in a square array on a perforated printed board; all the C-band antenna oscillators are arranged in the same direction and are perpendicular to the polarization direction of the Ku-band microstrip patch; the Ku-band patch and the C-band antenna oscillator both adopt a coaxial feeding mode, and the Ku-band patch adopts a coupling slot mode to radiate the patch; in the polarization direction of the strip line of the Ku-band microstrip patch, two adjacent C-band antenna oscillators in each row and each column of the C-band antenna are provided with a non-energized dummy C oscillator. The Ku-band microstrip patch and the C-band oscillator antenna are reasonably arranged in the same space range, and the dummy encryption decoupling technology is used, so that the above-mentioned dual-frequency and different physical form antenna array surfaces are integrated, and the coupling effect is reduced.

The invention provides a transmission structure color device based on a nanostructure cavity. The transmission structure color device is composed of a substrate layer, the nanostructure cavity and a top high-refractive-index dielectric layer. The nanostructure cavity is composed of a lower metal layer, an upper metal layer and a low-refractive-index intermediate dielectric layer comprising a high-refractive-index dielectric square array. The thickness h2 of the lower metal layer is 25 nm, the thickness h3 of the upper metal layer is 25-55 nm, the thickness h4 of the high-refractive-index dielectric square array is 192 nm, the thickness h5 of the low-refractive-index intermediate dielectric layer is 240 nm, the thickness h6 of the top high-refractive-index dielectric layer 6 is 50 nm, the width w of the high-refractive-index dielectric square array is 30-150 nm, and the period P is 160 nm. Under the condition that the thickness of the upper metal layer is kept unchanged, transmission colors which are insensitive in angle, high in saturation degree and large in color gamut coverage range can be obtained only by adjusting the width of the high-refractive-index dielectric square array.