294 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 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 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.

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 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.

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.

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 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 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.

The application provides an antenna and a communication device, relates to the technical field of communication, and aims to solve the problem that an antenna cannot effectively consider both a relatively narrow beam width and a relatively small profile height. The antenna provided by the application comprises a first radiating unit and a first conductive piece, the first radiating unit is used for transmitting or receiving a wireless signal, and the first conductive piece is connected with the first radiating unit in common; wherein, 2N first conductive pieces are arranged corresponding to one polarization of the radiating unit, N is a positive integer; the distance between the first conductive piece and the center of the first radiating unit is L1, the farthest distance from the edge of the first radiating unit to the feeding center is L2, and L1<=L2; so that the first conductive piece is coupled with the first radiating unit, thereby narrowing the beam width of the first radiating unit. In the antenna provided by the application, the first conductive piece is configured, the beam width of the first radiating unit can be effectively narrowed, and the profile height of the antenna is not obviously increased.

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.

This invention provides a silicon-based dielectric resonant antenna with adjustable beamwidth, comprising a beamwidth adjustment structure, an antenna substrate and a dielectric resonator, an excitation antenna, and solder bumps. The multilayer antenna substrate and dielectric resonator are arranged sequentially from top to bottom, with an air cavity formed in the middle. The excitation antenna is located at the bottom of the air cavity. The beamwidth adjustment structure is located on top of the top layer of the antenna substrate and dielectric resonator. A through-silicon via (TSV) is located in the middle of the bottom layer of the antenna substrate and dielectric resonator, with solder bumps located at the bottom of the TSV. This invention significantly reduces the antenna size and improves its radiation efficiency by using high-resistivity silicon as the antenna dielectric. By introducing an air cavity structure and adjusting the beamwidth through the top-layer beamwidth adjustment structure, the antenna application frequency can be changed according to usage, the feeding method can be modified and optimized according to application conditions, and it can be stacked with chips to achieve three-dimensional heterogeneous high-density integration.

Embodiments of the present application provide a beam width reconfigurable antenna and a base station, the antenna comprising: a main radiation unit configured to generate a first electromagnetic wave based on a feed network; a plurality of groups of electrically-controlled parasitic units arranged around the main radiation unit and configured to generate a second electromagnetic wave, so that the first electromagnetic wave and the second electromagnetic wave are fused to generate a third electromagnetic wave, and the third electromagnetic wave has adjustable beam width in a horizontal plane and a vertical plane. Through the present application, at least the problem that it is difficult to meet the needs of different communication environments in the related art is solved.

Base station antennas include first and second RF ports, a first array of radiating elements that includes a first column of radiating elements, a first additional radiating element and a second additional radiating element, where each of the radiating elements in the first array of radiating elements are coupled to the first RF port and not to the second RF port, and a second array of radiating elements that includes a second column of radiating elements, a third additional radiating element and a fourth additional radiating element, where each of the radiating elements in the second array of radiating elements are coupled to the second RF port and not to the first RF port. The first through fourth additional radiating elements may form a third column of radiating elements that is positioned between the first column of radiating elements and the second column of radiating elements.

An antenna system includes: a first antenna configured to beam steer electronically to first beams each with a beamwidth that is larger than a reference beamwidth; a second antenna configured to implement a second beam with a beamwidth that is smaller than the reference beamwidth; a gimbal; a gimbal driver; and a controller configured to: cause the first antenna to beam steer electronically to the first beams for a first mode of the antenna system; determine a preferred beam, of the first beams, based on a signal received by the first antenna via the preferred beam; and cause the gimbal driver to move the gimbal to mechanically steer the second antenna to at least one direction corresponding to the preferred beam for a second mode of the antenna system.

The invention discloses a broadband two-dimensional sparse array layout optimization method based on compressed sensing and subarray optimization, which comprises the following steps of: firstly, optimizing broadband two-dimensional uniform array directional diagram representation based on a two-dimensional subarray optimization method, constructing an optimization model of a sparse two-dimensional array based on L0-norm, setting a two-dimensional subarray constraint condition meeting a beam forming requirement, and constructing a sparse two-dimensional array layout optimization model based on L0-norm; and generating a two-dimensional array coefficient by using the optimization model, carrying out sparsity check on the two-dimensional array coefficient, and finally determining an optimal coefficient according to the generated two-dimensional sparse array to obtain a finally determined two-dimensional sparse array. According to the scheme of the invention, the broadband two-dimensional sparse array arrangement optimization method based on compressed sensing and subarray optimization is provided, and a two-dimensional subarray optimization algorithm and an L0-norm compressed sensing algorithm are combined. According to the method, the array element number of the large-scale two-dimensional array can be efficiently compressed, the beam width, the main-to-auxiliary ratio and the broadband response characteristic of the main lobe of the two-dimensional array can be restrained at the same time, and hardware overhead can be remarkably saved.

The application discloses an ultra-wideband circularly polarized wide-beam four-ridged horn antenna, which comprises four ridges arranged in a circle and a bottom-closed and top-open metal horn side wall, the ridges are connected with the upper surface of the bottom of the metal horn side wall, the lower surface of the bottom of the metal horn side wall is connected with a power division and phase shift network, the power division and phase shift network is connected with metal probes respectively arranged between two adjacent ridges of the four ridges, and the other two ridges are in contact with the cladding part of the metal probes; the working frequency band and the beam width are improved under the premise of small size by loading a stepped radiation structure on the upper part of the metal horn side wall, the beam width is regulated by adjusting the height and width of each layer of the stepped radiation structure, the beam width is further improved by introducing a circular slot on the metal horn side wall, and meanwhile, the metal probes which are bent by 90 degrees are arranged in the probe baffle, the side-feeding form of the four-ridged horn antenna is changed into bottom-feeding, and the occupation of the lateral space can be reduced without changing the original performance of the antenna.

This invention relates to the field of aircraft antenna technology, and discloses a low-tilt, wide-beam, high-gain, low-profile aircraft antenna, comprising a rectangular waveguide body, a radiating aperture, a beam modulation control, and a protective structure. The radiating aperture is the open end of the rectangular waveguide body, the beam modulation control is located at the radiating aperture, and the protective structure covers the rectangular waveguide body and the radiating aperture. The rectangular waveguide body is a highly compressed structure. This invention solves the problems of high beam tilt, narrow beamwidth, and low antenna gain commonly used in microstrip antennas for aircraft, and features low tilt, wide beam, high gain, and low profile, which can greatly improve the widespread use of low-tilt, wide-beam, high-gain, low-profile antennas in various aircraft.

An array antenna high-performance radiation boundary comprises a feed power dividing plate, a plurality of antenna radiation units are arranged on the feed power dividing plate, the antenna radiation units are arranged in the horizontal transverse direction and the longitudinal direction to form an array structure, adjacent antenna radiation units are symmetrically separated through baffles, the baffles are vertically arranged on the feed power dividing plate, and the baffles are arranged on the feed power dividing plate. A plurality of metal areas are arranged on the side surface of the baffle plate, are directly formed on the baffle plate through a copper coating process, and are separated by blank areas. According to the utility model, the baffle plate is arranged in the middle of the antenna radiation unit, the decoupling function is realized by using the metal area formed by coating copper on the baffle plate at intervals, the isolation degree between the antenna radiation units is improved, the horizontal plane half-power beam width is converged, and the cross polarization of the antenna is improved; different electrical performance requirements are met by designing different metal area shapes and sizes, the application range is wide, and switching operation is simple.

The utility model discloses a miniaturized double-frequency wide-beam terminal antenna, which relates to the technical field of mobile terminal antennas and comprises an antenna cap, an antenna housing, a radiator assembly, a feed network module, a radio frequency connector and an antenna base, and the radiator assembly, the feed network module and the radio frequency connector are sequentially distributed inside the antenna housing from top to bottom. According to the miniaturized double-frequency wide-beam terminal antenna, the radiation copper strip is arranged in a gradually-changed spiral form, and when the radiation copper strip is at the same rising angle, the spiral arm with the top open circuit structure has a wider beam width than the spiral arm with the short circuit structure, so that low-elevation electromagnetic signal radiation and reception of the satellite antenna are facilitated; the radiation copper strip is provided with four feeding points, each feeding point is connected with two oscillator arms with different lengths, the circular polarization characteristic and the double-frequency radiation characteristic of the antenna are guaranteed, the two oscillator arms with the same feeding guarantee different rising angles and widths, the isolation degree of double-frequency radiation is improved, the shape of a directional diagram is more regular, and higher radiation gain is achieved.

The embodiment of the application provides a magneto-electric monopole antenna unit, a magneto-electric monopole antenna array, an antenna and equipment, and belongs to the technical field of wireless communication. The antenna unit comprises a first dielectric substrate, a monopole radiator, a microstrip feed line, a metal reflector plate, a short-circuit metal column and two ground patches. It generates an electric monopole mode through the monopole radiator excitation, and generates a magnetic monopole mode through the short-circuit metal column, the ground patch and the reflector plate, and the two modes work together to realize wideband radiation and widen the beam width. The coupled currents on the two ground patches produce two pairs of opposite electric field components in the far field and offset each other, thereby realizing low cross polarization. The array composed of multiple units is loaded with a metasurface above, which significantly improves the port isolation by introducing a reflection path opposite in phase to the original coupling path. The application solves the technical problem that it is difficult to simultaneously realize wide-angle scanning, low cross polarization and high isolation in a wide frequency band.

Embodiments of the present application provide a satellite communication method and a related apparatus. A network device supports activation of a first type of beam and a second type of beam. The coverage range of the first type of beam is wide, and the coverage range of the second type of beam is narrow, or the half-power beam width of the first type of beam is large, and the half-power beam width of the second type of beam is small. It can be understood that: a beam having a large half-power beam width results in the beam having a wide coverage range, and because a network device supports activating a beam with a wide coverage range, the increased coverage range of such a beam can enhance the coverage area of the network device. In the present satellite communication method, a terminal receives an SSB sent by the network device on the basis of a first beam. The first type of beam is activated by the network device in a number M of consecutive SSB periods. The terminal sends uplink control information and / or uplink service data on the basis of a second beam, or receives downlink control information and / or downlink service data on the basis of the second beam. The first type of beam comprises the first beam, and the second type of beam comprises the second beam.

This invention relates to the field of antenna technology, and particularly to a miniaturized circularly polarized antenna with a wide axial ratio and wide beamwidth. The antenna includes a dielectric substrate, a circular radiating patch unit, metal shorting posts, a coaxial differential feed structure, and a metal ground plane. The circular radiating patch unit consists of a pair of orthogonal fan-shaped cross-printed dipoles. A slot structure is added in the middle along the X-axis to divide the radiator into left and right parts, and three metal shorting posts are added to the end of each fan-shaped cross-printed dipole structure. The feed structure is a differential-feed coaxial cable, with its inner and outer conductors contacting the left and right halves of the circular radiating patch unit, respectively. Simultaneously, due to the slight difference in curvature between the two orthogonal fan-shaped printed dipoles, a phase difference is formed between the pair of orthogonal modes of the circular radiating patch unit, ultimately achieving circularly polarized radiation of the antenna. A metal short-circuit post is applied to the electric field zero of a conventional printed dipole, forming a new half-mode operating mode at low frequencies. Simultaneously, the slot structure improves the impedance characteristics of the half-mode, enabling antenna miniaturization. Due to the radiation contribution of the metal short-circuit post in the horizontal direction, the axial ratio beamwidth of this circularly polarized antenna is significantly extended. This application exhibits excellent forward radiation characteristics, along with miniaturization, a wide axial ratio beamwidth, simple structure, low cost, and ease of fabrication.

The application discloses a compact broadband beam dipole antenna array based on high-order modes, which comprises two subarrays, the two subarrays share a dielectric substrate with upper and lower surface parts partially covered with copper, and are fed with equal amplitude through a 1:2 power division feeding structure, the two subarrays are left-right symmetrical about a central axis of the dielectric substrate, each subarray comprises a substrate integrated waveguide cavity and multiple pairs of side-by-side dipoles, and is connected by a grounded coplanar waveguide, the substrate integrated waveguide cavity is formed by equidistantly arranging metalized vias, and works in TE 510 high-order modes, a dipole is arranged at the position of the center of the periphery of each electric field loop of the substrate integrated waveguide cavity, and single-side radiation with high directivity in the H plane and wide 3dB beam width in the E plane can be obtained by arranging the radiation arms of the dipoles according to the superposition and cancellation rules of the radiation field. The application solves the problems of complex structure and difficult implementation of the existing wide beam antenna.

Beam selection method for accessing a wireless network. This description relates to a method for selecting beams from a base station (BS) to user equipment (UE1, UE2), the base station (BS) comprising a multi-source antenna array comprising subsets of elementary antennas, the method comprising the steps of emitting, by each subset of elementary antennas in successive stages, a beam, all beams having the same beamwidth, and, for each subset of elementary antennas, all beams emitted by said subset of elementary antennas pointing in directions different from each other and different from the directions of the first beams emitted by each other subset of elementary antennas;and reception by the base station (BS) of a signal emitted by each user equipment (UE1, UE2) indicating at which stage among the first stages the maximum power beam was received by said user equipment (UE1, UE2). Figure for the abbreviation: Fig. 2;

The present disclosure provides an electronically steerable and switchable antenna array. The antenna array can: produce a first beam having a first coverage and a second beam having a second coverage by selecting one of a first beamwidth and a second beamwidth for the first beam and the second beam; responsive to selecting the first beamwidth: switch a signal input to a narrow beam antenna array; steer the first beam to one of a first positive, negative, or zero offset position; independently steer the second beam to one of a second positive, negative, or zero offset position; transmit a signal received from the signal input via the first beam and the second beam; and responsive to selecting the second beamwidth: switch the signal input to a wide beam antenna array; and transmit a signal received from the signal input via the first beam and the second beam.