437 results about "Beamwidth" patented technology

The invention discloses a phased array weather radar calibration method based on a generalized metal ball calibration theory. Comprising the following steps: in a microwave anechoic chamber, collecting two-dimensional antenna pattern data of a phased array weather radar in at least one working mode and pointing to a plurality of different beams; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe solid angle of the transmitting antenna and the receiving antenna, and calculating an equivalent beam width product; calculating a calibration theoretical reflectivity factor of the metal ball based on the product of the theoretical radar scattering sectional area and the equivalent beam width of the metal ball; actual detection echo data of the phased array radar on the metal ball under different working modes and beam pointing is acquired, and an actual reflectivity factor is calculated; and comparing the actual reflectivity factor with the calibration theoretical reflectivity factor to complete calibration of the phased array weather radar. Aiming at the non-Gaussian working mode of the phased array weather radar, the reflectivity factor of the phased array weather radar can be quantitatively evaluated, and the radar detection performance is improved.

The invention provides a wide and narrow wave beam adjustable array antenna, which comprises at least two groups of sub-arrays, each group of sub-arrays comprises at least one high-frequency dual-channel antenna, the side edge of each high-frequency dual-channel antenna is provided with a reflection boundary, and the reflection boundary is driven by a lifting device to ascend and descend. The high-frequency dual-channel antenna works in a corresponding wave beam working mode under the condition that the reflection boundary is at a plurality of different heights; wherein the beam working mode comprises a wide beam mode, a first conventional antenna mode and a second conventional antenna mode, and the beam width of the first conventional antenna mode is different from that of the second conventional antenna mode. According to the invention, the beam width can be adjusted by adjusting the height of the reflection boundary, so that the requirements in different scenes are met.

The invention provides a method for generating weather radar contour surface grid point data by considering beam width, and belongs to the technical field of weather radars, and the method comprises the following steps: obtaining radar base data, radar scanning range, target contour surface height, grid spacing and calculation precision, constructing a standardized grid, and obtaining a target contour surface grid point data set; the method comprises the following steps of: screening standard grid points meeting a radar scanning range, extracting data of which the current elevation angle meets a contour surface requirement, calculating a central azimuth angle of each layer of elevation angle and each radial wave beam, merging radar data of each layer under polar coordinates, and mapping radar data of the polar coordinates to a screened standard grid. The calculation complexity of the method is greatly optimized, and the calculation efficiency of the method is remarkably different from that of a traditional method.

The invention discloses a target trajectory tracking method and product based on azimuth statistical analysis and prediction, and the method comprises the steps: converting a horizontal array manifold vector according to a set interval, carrying out the array signal processing of the array manifold vector at each angle according to a set scanning interval, and obtaining the beam width at the angle; performing spatial spectrum synthesis on the horizontal array receiving data according to a plane wave array signal processing method to obtain a horizontal array data synthesis azimuth spectrum; presetting an initial azimuth angle of a to-be-tracked target, and solving a target azimuth angle at the current moment in combination with a target operation attribute corresponding to the azimuth angle, an array azimuth estimation error and a beam width; within the statistical time, adopting a least square method to predict a target azimuth angle, and adopting a target azimuth angle track compensation value to compensate a target azimuth angle prediction value; the target azimuth angle at the current moment is extracted according to the target azimuth angle predicted value, and then continuous and stable tracking of the target azimuth trajectory is completed.

The invention provides a passive antenna array beam forming test method and system, and relates to the technical field of beam forming test. According to the method, channel baseline parameters are established in a silencing environment, frequency hopping and channel switching are combined to realize multi-frequency-point synchronous sampling, a reference source and self-polling data are utilized to calculate a mutual coupling correction matrix and a feeder line consistency factor, and weight projection and equivalent aperture field generation are completed without changing physical wiring conditions; further extracting a main lobe direction, a beam width, a side lobe level and a scanning consistency index through far field transformation, and unwrapping and smoothing a frequency-point-crossing phase result; and meanwhile, generating a unique traceability identifier, establishing full-link association between a test condition and a result, and outputting a criterion conclusion. According to the method, the accuracy, efficiency and traceability of passive array beam testing are improved.

The invention provides a wide-axial-ratio circularly polarized antenna, and relates to the technical field of antennas, and the antenna comprises a dielectric substrate, and the edge of the dielectric substrate is uniformly provided with metalized via holes; the radiation patch covers the upper surface of the dielectric substrate, and a first circular gap is formed in the middle of the radiation patch; the feed network is located on the lower surface of the dielectric substrate; the metal cover comprises a metal back cavity, the metal cover covers the bottom of the feed network and the bottom of the dielectric substrate, and the feed network is located in the metal back cavity; the radio frequency connector passes through the dielectric substrate and the radiation patch and is welded on the upper surface of the radiation patch; one end of the coaxial cable is connected to the lower end of the radio frequency connector, and the other end of the coaxial cable penetrates through the metal back cavity and is connected with the metal cover; the invention is used for solving the technical problems of low gain, narrow axial ratio beam width, complex design and manufacture and overlarge antenna size of the existing circularly polarized antenna.

The invention relates to the technical field of antennas, and further relates to a wide-beam multi-vibrator planar antenna supporting Tiantong Beidou frequency bands, which comprises a multi-vibrator radiation array element layer, a coplanar feed-amplitude shaping network, a stepped impedance matching section, a low-loss double-layer dielectric laminated layer and a metal reflecting plate, the outermost side of the multi-oscillator radiation array element layer is a PCB lamination layer; the coplanar feed-amplitude shaping network comprises a radiation patch, and different current amplitudes are provided for all oscillators through phase shift sections with different electric lengths so as to ensure that the half-power beam width can still reach 90 degrees or above under the condition of the shortest Beidou wavelength; the stepped impedance matching section is a pi-shaped converter formed by connecting three microstrip lines with different widths in series; and the low-loss double-layer dielectric laminated layer is used for solving the minimum distance between the metal reflecting plate and the PCB laminated layer according to the theoretical minimum gain. The antenna has the advantages of compact structure, stable gain and wide beam width.

The invention discloses a beam management method, a base station, a storage medium and a program product, relates to the technical field of wireless communication, and can simplify detection and alignment steps in a beam forming process, realize faster and more accurate beam forming and ensure robustness and reliability of a communication system in a complex scene. The method comprises the steps that a sensing signal is sent periodically, an echo signal of the sensing signal is received, the sensing signal is used for sensing mobile information of a terminal, and the echo signal is obtained by reflecting the sensing signal through the terminal; determining movement information of the terminal relative to the base station according to the echo signal; a first wave beam is determined according to the movement information, a signal is sent to a terminal through the first wave beam, the width of the first wave beam is within a set width range, and the maximum value of the set width range is smaller than a narrow wave beam width threshold value.

The invention relates to a focused ultrasonic wave-based target positioning method, which comprises the following steps of: acquiring original data of an ultrasonic signal through a sensor array, recording propagation time and intensity distribution, separating a main signal from an interference signal by adopting a time domain analysis method, and determining a preliminary energy distribution characteristic; according to the energy distribution characteristics, correcting a signal propagation path by using a sound velocity distribution model, and determining a corrected energy concentration degree value; signal boundaries are enhanced through an adaptive filtering algorithm, half-power point features are extracted through wavelet transform, and a beam width quantization result is determined; according to a beam width quantification result, calculating peak distribution of a main lobe and a side lobe by using an array response function, and determining an initial evaluation value of a side lobe suppression ratio; adjusting weight distribution through a multi-dimensional parameter joint optimization algorithm, and determining an environment adaptive weight distribution scheme; and combining the energy distribution predicted value and the beam width quantification result through a weighted fusion algorithm, and determining a focusing precision evaluation value by adopting Kalman filtering smoothing processing.

The utility model discloses an oscillator array device, which comprises an oscillator, the oscillator comprises a base material and a radiating surface, the base material comprises a first base material and a second base material, the first base material and the second base material are vertically arranged, and the radiating surface is arranged on the first base material and the second base material; the reflecting plates and the oscillators are arranged on the reflecting plates, the reflecting plates comprise the first reflecting plates and the second reflecting plates, the first reflecting plates and the second reflecting plates are arranged side by side in the first direction, the first reflecting plates and the second reflecting plates are arranged side by side in the second direction, and the oscillators radiate signals through the radiation surfaces. The first base material and the second base material are used for arranging the radiating surface and providing support for normal work of the radiating surface, and the reflecting plate is used for installing and fixing the oscillators and facilitates arrangement of the oscillators, so that the horizontal beam width of signals reflected by an array is more concentrated, and the signal transmission efficiency is improved.

A method comprising receiving a positioning reference signal request, determining positioning requirements associated with the received positioning reference signal request, determining capabilities of a terminal device, determining an antenna array radiation pattern beam width for a position reference signal based, at least partly on the determined positioning requirements and the determined capabilities of the terminal device, obtaining a value for a compensation parameter based on the determined antenna array radiation pattern beam width, performing beam steering towards a target access node, and performing a timing compensation using the compensation parameter with the obtained value.

The invention relates to the field of millimeter wave radars, and discloses a 45-degree polarized array waveguide antenna for a millimeter wave radar, which comprises a metal groove layer; a slot array element layer; the slot array element layer and the metal slot layer are connected in a vertical lamination mode; the metal groove layer is provided with a plurality of radiation grooves; radiation grooves with the same number are formed in the metal groove layer at the corresponding positions of the slot array elements; the radiation slot indirectly increases the effective radiation aperture area of the antenna. The invention provides a method for solving the problems of low array pattern sidelobe, low gain and wide beam width of the N-element waveguide array antenna in a miniaturized application scene.

The invention discloses a dual-polarization one-dimensional scanning phased-array antenna and a weather radar system, the antenna comprises a radiation layer, a first feed layer, a first PCB layer, a second feed layer, a second PCB layer and a third feed layer which are stacked from top to bottom, and a horizontal polarization radiation unit and a vertical polarization radiation unit of the radiation layer are arranged in an orthogonally staggered manner; each first feeder is etched on the top surface of the first PCB layer and corresponds to a first metal groove formed in the bottom of the first feed layer and a second metal groove formed in the top of the second feed layer in position; and each second feed line etched on the top surface of the second PCB layer corresponds to the position of a third metal groove formed in the bottom of the second feed layer and the position of a fourth metal groove formed in the top of the third feed layer. According to the invention, high cross polarization isolation is realized, and the antenna has dual polarization beams with low side lobes and consistent beam width and pointing height in the whole working frequency band.

The invention discloses a waveguide antenna structure and a radar, and relates to the field of waveguide antennas. The antenna structure comprises a first substrate and a second substrate, wherein a waveguide cavity is formed by a first waveguide channel arranged on the bottom surface of the first substrate and a second waveguide channel arranged on the top surface of the second substrate; the top surface of the first substrate is provided with a plurality of rows of radiation slots, and each row of radiation slots is communicated with the corresponding first waveguide channel. The radiation slots comprise a first radiation slot and a second radiation slot; each group of first radiation slots comprises two rows of first radiation slots, a first metal ridge is arranged between two adjacent groups of first radiation slots, and a second metal ridge is arranged on the outer side of the outermost row of first radiation slots; a third metal ridge is arranged between two adjacent rows of second radiation slots, and a fourth metal ridge is arranged on the outer side of the outermost row of second radiation slots. According to the invention, the antenna beam width is widened, the beam is stabilized, and the radar can realize a large detection range.

The invention discloses an ultra-wide beam broadband four-arm helical antenna based on parasitic loading. The ultra-wide beam broadband four-arm helical antenna comprises a circular dielectric substrate, an arc parasitic radiation arm, a cylindrical support, a flexible dielectric substrate, a stepped impedance winding helical arm, a floor and a coaxial feed. The antenna can realize wide axial ratio beam width and wide half-power beam width in a working frequency band range of 2-2.5 GHz, meanwhile, the antenna has a relatively small size, the stability, the anti-interference capability and the coverage range of a wireless communication system are improved, and the antenna can flexibly cope with various complex scenes. In addition, the antenna works in a wide frequency band and has a wide 3-dB axial ratio beam width in the wide frequency band, for example, the 3-dB axial ratio beam width at a 2.2 GHz frequency point reaches 235 degrees; the 3-dB axial ratio beam width at the 2.3 GHz frequency point reaches 252 degrees; and the 3-dB axial ratio beam width at a 2.4 GHz frequency point reaches 236 degrees.

Disclosed are techniques for wireless sensing. In some aspects, a sensing node may transmit a first set of one or more sensing reference signals over a first set of transmit beams during a first stage of a sensing session. The sensing node may transmit a second set of one or more sensing reference signals over a second set of transmit beams during a second stage of the sensing session based on a plurality of criteria, wherein the plurality of criteria is based on one or more measurements of one or more sensing targets obtained by beamsweeping the first set of transmit beams, and wherein beamwidths of the second set of transmit beams are narrower than beamwidths of the first set of transmit beams.

Techniques are described for selecting co-channel cells for a LEO satellite system based on defining stay-out distances in UV space units. For example, “stay-out distance” can be defined as x-dB of beamwidth. Each x-dB in UV space remains substantially constant, regardless of the scan angle of the beam. As such, for any cell, regardless of its location in UV space, the responses of co-channel beams not directed at this cell will have dropped off by a consistent amount over the stay-out distance, and the stay-out distance (e.g., the value of x) can be defined such that the drop-off is sufficient to keep responses of co-channel beams not directed at any particular cell to within an acceptable level of interference.

The invention belongs to the technical field of beam forming, and discloses a frequency control array beam forming method based on logarithmic multicarrier, which comprises the following steps: S1, determining the array element arrangement position and structure of a frequency control array, and selecting a symmetrical array structure; s2, dividing a trigonometric function, adopting asymmetric frequency offset, introducing logarithmic multicarrier on the basis of triangular frequency offset, and designing the frequency offset; s3, substituting the designed frequency offset form into a transmitting beam model of the basic frequency control array; and S4, substituting the designed frequency deviation into the basic frequency control array model to obtain a beam directional diagram under the frequency deviation, and completing the design. According to the technical scheme provided by the invention, the beam width of the frequency control array beam directional diagram is effectively reduced, and the resolution of the beam is improved.

The invention provides a radar antenna structure damage and function damage mapping evaluation method and system based on a subarray-level equivalent target, and relates to the technical field of radar antenna damage effect evaluation. According to the method, a baseline parameter set is formed through standardized filing of functional parameters of an equivalent target array structure, damage is loaded and damage parameters are collected under a preset working condition, main lobe gain, beam width, side lobe level and beam pointing are tested, functional variable quantity is calculated, array surface damage is divided and coded through a two-dimensional matrix and blocks, and standardized input is generated. A quantitative mapping model is established, and through cross validation, residual analysis optimization and adaptive updating, high-precision and traceable evaluation of structures and functions under multiple working conditions is realized, and support is provided for criterion optimization and anti-damage design.

This invention discloses a three-element leaky wave antenna array structure based on a dielectric ridge parallel plate waveguide, comprising: S1, designing a three-element array structure based on the coupling characteristics of the dielectric ridge parallel plate waveguide, wherein the two-port array antenna is fed by probes in parallel; S2, determining the slot design of the three elements according to the pattern product theorem and the relationship between slot size and leakage, thereby designing a scanning beam that meets the requirements of narrow beamwidth and high gain. This invention is a leaky wave antenna array structure with narrow beamwidth and high gain characteristics proposed to meet the requirements of high signal strength and strong anti-interference in long-distance point-to-point communication systems. This antenna can provide better directivity and higher communication quality, while ensuring that the antenna has the advantages of compact structure and small size, thus it can be applied to wireless power transmission systems such as satellite communication systems, radar systems, and the Internet of Things.

The invention provides a wide-axial-ratio circularly polarized antenna based on a four-feed annular dipole, and relates to the technical field of antennas. Comprising a bottom dielectric plate, and a feed network is printed on the upper surface of the bottom dielectric plate; the isolation plate is positioned above the bottom dielectric plate; the top dielectric plate is located above the isolation plate, and a coaxial cable is arranged between the top dielectric plate and the isolation plate; a radiation patch is printed on the lower surface of the top dielectric plate, four metal patches are printed on the upper surface of the top dielectric plate, and the radiation patch is formed by surrounding four fan-shaped patches; the metal sheet covers the central position above the top dielectric plate; the metal ring is arranged outside the bottom dielectric plate and the top dielectric plate in a covering mode, the isolation plate, the coaxial cable, the radiation patch, the metal patch and the feed network are wrapped in the metal ring, and the technical problems that in the prior art, the axial ratio bandwidth of an antenna is narrow, and the 3dB axial ratio beam width is not large enough are solved.

The invention relates to the technical field of beam forming, and discloses an RIS enhanced beam-width-adjustable beam forming method, system, medium and equipment, and the method comprises the steps: constructing an RIS-assisted ISAC system, constructing a sensing channel model in the system, and calculating the phase shift of standard beam forming; calculating the sensing gain of the potential target by combining the position of the sensing target relative to the user center based on the phase shift of the standard beam forming; reconstructing the sensing gain of the potential target by using a stationary phase method, and solving an ideal beam forming phase shift when the sensing gain of the reconstructed potential target is optimal; adjustment of the beam width and the channel gain is realized by adjusting the expression form of the ideal beam forming phase shift. According to the invention, the width of the sensing beam can be adjusted and is used for replacing resource-intensive narrow beam scanning sensing, so that the resource utilization rate is improved, the interference is reduced, and the calculation complexity is reduced.

The invention discloses an antenna control method, system and device and a computer readable storage medium, and relates to the technical field of communication, and the method comprises the steps: obtaining a target position of a terminal device; generating mechanical platform control information and beam forming control information according to the target position; performing angle control on the mechanical platform according to the mechanical platform control information; performing angle control on the beam forming chip according to the beam forming control information; wherein the mechanical platform is used for carrying out horizontal rotation and / or pitching rotation on the antenna array; and the beam forming chip is used for performing phase control and / or amplitude control on the antenna array. According to the invention, large-range coarse adjustment of the horizontal angle and / or the pitching angle of the antenna array can be carried out by means of the mechanical platform, and small-range fine adjustment of the antenna array can be carried out by means of the beam forming chip, so that the antenna array can flexibly send beams to the terminal equipment, the beam width limitation of a small-size array is broken through, and the antenna array can be flexibly and accurately adjusted. And the signal quality of the terminal equipment is improved.

This disclosure provides methods, components, devices, and systems for beam search procedures for multiple spatial streams. Some aspects more specifically relate to beamforming training procedures for multiple spatial streams. The beamforming training procedures may provide beam separation between beams during the training procedure to prevent selecting beams which lead to inter-stream interference. In some examples, a multi-stream beamforming training procedure described herein may use antenna polarization to provide beam separation. For example, different radio frequency (RF) chains may use different antenna polarizations. Additionally, or alternatively, a multi-stream beamforming training procedure may provide beam separation through antenna orientation, where different RF chains use mutually exclusive beam search regions. Additionally, or alternatively, the responder wireless communication device may iteratively select beamforming directions for spatial streams, or one-by-one, and the initiator wireless communication device may perform additional beam searches excluding directions within beam widths of previously-selected beams.

Embodiments of the present application provide a beam adaptive adjustment method and device, a base station equipment and a storage medium. The method comprises: receiving a first beam measurement report, wherein the first beam measurement report comprises one or more first parameter values, and the first parameter values are used to indicate the signal quality of the millimeter wave beam measured by the user equipment; and performing millimeter wave beam adaptive adjustment based on the first beam measurement report, wherein the millimeter wave beam adaptive adjustment comprises adjusting the width of the millimeter wave beam. The present application adjusts the width of the millimeter wave beam according to the beam measurement report reported by the terminal, realizes the adaptive adjustment of wide and narrow beams, and improves the signal coverage of the multi-antenna array.

The invention discloses a beam broadening phase generation method based on hierarchical optimization, and the method comprises the following steps: 1, the configuration of X-waveband phased array weather radar parameters and primary optimization parameters; 2, the selection of a phase construction function; 3, the rapid calculation of a directional diagram based on matrix operation; 4, the selection of a calculation method of robust beam width; step 6, optimization objective function setting; and step 7, directional diagram secondary optimization based on a random phase. According to the method disclosed by the invention, beam broadening can be realized through the phase weight on the premise of not using variable amplitude weight and reducing the number of used antenna arrays, and the method has important significance in improving wide transmitting and narrow receiving capabilities of an X-band phased array weather radar and improving the time resolution of the radar.

This invention provides a method for rapid planar near-field measurement of large-aperture antennas, relating to the field of antenna technology. The method obtains sparse field amplitude and phase information of several sampling surfaces in the near-field radiation region of the antenna under test through large-step uniform sampling. Simultaneously, it samples a finite number of precise field amplitude and phase information points for each sampling surface and obtains the field distribution characteristics by calculating the fluctuation of the amplitude at the sampling points. Based on the sparse field amplitude and phase information and field distribution characteristics of the sampling surfaces, it uses partitioned interpolation and field distribution calibration methods to obtain the initial electric field of each sampling surface. Based on planar wave spectrum theory, iterative numerical calculations are performed on the initial electric field to recover the near-field distribution of each sampling surface. Finally, the far-field radiation characteristics of the antenna are obtained through near-field-to-far-field transformation. This invention can significantly shorten the testing time while obtaining key indicators of the antenna's far-field characteristics, including the normalized radiation pattern main lobe and first sidelobe, 3dB beamwidth, sidelobe level, and axial ratio.

This invention provides a wavefront design method and system based on a space-based early warning radar, including acquiring the system scanning time, radar range-azimuth ground coverage range, beam coverage overlap rate, radar azimuth beam center, and radar initial wavefront near-end down-view angle; determining the 3-dB elevation main lobe beamwidth of the current wavefront based on the near-end down-view angle value of the current range wavefront; determining the far-end down-view angle value of the current wavefront based on the beam center calculation result of the current range wavefront; iteratively updating the near-end down-view angle of the next range wavefront to the near-end down-view angle of the current wavefront, and outputting all range wavefront division results; sequentially calculating the 3-dB azimuth main lobe beamwidth based on the near-end spatial cone angle of each azimuth wavefront, sequentially updating the beam center and far-end down-view angle of the azimuth wavefront, iteratively processing until the azimuth-ground distance meets the given azimuth coverage requirements; and finally outputting the wavefront design calculation results that meet the range-azimuth coverage requirements and the required dwell time for each wavefront.

The invention discloses a center feed four-azimuth wave beam reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of a straight arm, a crank arm, a central square patch, a capacitor loading ring, a shunt feeder line and a composite beam RF MEMS switch loaded at a fracture on the shunt feeder line, the structures are in central symmetry about a feeding point and respectively cover a 90-degree space range, and the feeding structure is connected with the center of a top patch through a microstrip feeder switching metal column. When the MEMS switch on a certain branch feeder line is switched on, current fed in from the center firstly flows to the straight crank arm radiation unit at the near end of the closed switch through the branch and then flows to the radiation unit at the far end, phase lag of the current at the far end is equivalent to superposition of a binary array, deflected wave beams are generated, the deflection angle can reach 50 degrees, the gain is 4.9 dB, and the wave beam width can reach 120 degrees. The structural design in central symmetry can realize the reconfigurability of wave beams in four directions in a space quadrant.

The invention provides a one-dimensional wide-angle scanning phased-array antenna based on a multimode substrate integrated waveguide. The one-dimensional wide-angle scanning phased-array antenna comprises a plurality of antenna units, a rectangular SIW cavity structure formed by a plurality of first metalized via holes connected with the metal bottom plate is arranged at the position, close to the periphery, of each antenna unit radiation patch; and two symmetrical rectangular radiation slots, a rectangular mode fusion groove and two rows of second metalized via holes are etched in the SIW cavity on the radiation patch. According to the SIW cavity structure, the defect of relatively high transmission loss caused by easy leakage of a fringe field in the prior art is avoided, and the scanning range of a wave beam is effectively widened; the rectangular mode fusion groove and the two rows of second metalized via holes change the current path when the antenna works, realize effective fusion of TE10 and TE30 resonant modes, effectively widen the working bandwidth of the antenna and the 3dB beam width of a radiation pattern, and are used for solving the problems of narrow working bandwidth and small beam scanning range in the prior art.