13 results about "Square array" patented technology

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.

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 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).

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.