181 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.

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.

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.

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 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.

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.

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.

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.

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 application discloses a 5G millimeter wave dual-frequency antenna based on a multilayer metasurface and belongs to the field of radio frequency front-end devices; the upper surface of a lower dielectric layer is provided with a slotted patch, and the lower surface of the lower dielectric layer is provided with a metal ground; the slotted patch is a square metal plate, which is provided with a first L-shaped slot and a second L-shaped slot; the two branch ends of the first L-shaped slot are provided with extension sections; the first L-shaped slot and the second L-shaped slot surround a square ring, and the extension section and the branch of the first L-shaped slot adjacent to the extension section have a spacing greater than zero; the upper surface of a middle dielectric layer is provided with a lower metasurface structure; the lower metasurface structure is composed of multiple metasurface units arranged in a rectangular array mode; the upper surface of an upper dielectric layer is provided with an upper metasurface structure; and a feeding structure is located on the upper surface of the lower dielectric layer. The application can produce dual frequency bands by slitting the patch antenna, load double-layer metasurface structures above the patch antenna, and increase the frequency band width and the beam width of the antenna.

The invention discloses a 5G network ultra-far coverage method, system and device for marine economy and a medium, and belongs to the technical field of wireless communication, and the method comprises the steps: building a geometric propagation relation based on the earth curvature according to the hanging height of an antenna and the height of a terminal device, and calculating a sight distance coverage distance through a geometric figure formed by a base station antenna, a terminal and the earth center; adaptively selecting a working frequency band according to the sight distance coverage distance and the service bandwidth requirement, determining an antenna gain requirement and a beam width requirement according to the wavelength characteristic of the working frequency band, and selecting an antenna; when a time division duplex system is adopted, the cyclic prefix length and the guard interval length are configured according to the propagation time delay so as to expand the coverage distance; and when the frequency of the working frequency band is relatively high, a multi-cell joint receiving and uplink channel quality enhancement technology is configured. According to the method, the sight distance coverage range is accurately calculated by establishing the geometric propagation model based on the earth curvature, and ultra-long-distance coverage of the sea area is realized through frequency band antenna collaborative optimization and frame structure parameter configuration.

This application provides an antenna and communication device, relating to the field of communication technology, to solve the problem that antennas cannot effectively balance narrow beamwidth and small profile height. The antenna provided in this application includes a first radiating element and a first conductive element. The first radiating element is used to transmit or receive wireless signals, and the first conductive element is grounded with the first radiating element. Each polarization of the radiating element corresponds to 2N first conductive elements, where N is a positive integer. The distance between the first conductive element and the center of the first radiating element is L1, and the farthest distance from the edge of the first radiating element to the feed center is L2, where L1 ≤ L2. This allows the first conductive element to couple with the first radiating element, thereby narrowing the beamwidth of the first radiating element. In the antenna provided in this application, by configuring the first conductive element, the beamwidth of the first radiating element can be effectively narrowed without significantly increasing the antenna's profile height.

The application belongs to the technical field of satellite communication and on-board scheme design, and discloses a load balancing hop-beam scheme design method, which comprises the following steps: acquiring the number of users, user latitude and longitude information and user rate demand, planning the wave position center direction and the beam width and mapping them into array steering vectors with the interference direction, constructing a main lobe constraint, an intra-cluster interference constraint matrix and an inter-cluster interference constraint matrix and solving beamforming weights, constructing a Markov decision process state, inputting the state into a policy network, outputting a binary lighting action vector, determining a lighting beam set, calculating user signal-to-interference-and-noise ratio and time slot throughput according to the lighting beam set and intra-cluster and inter-cluster interference gain, and constructing a reward function containing the influence of intra-cluster and inter-cluster interference, and iteratively training to obtain a corresponding hop-beam scheme. The application realizes interference suppression and online decision of multi-beam parallel lighting, improves the long-term cumulative throughput of the system, and improves the load balancing performance and service quality.

The application discloses a phased array weather radar calibration method based on generalized metal ball calibration theory. The method comprises the following steps: collecting two-dimensional antenna pattern data of a phased array weather radar under at least one working mode and multiple different beam directions in a microwave darkroom; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe real solid angle of a transmitting antenna and a receiving antenna, and calculating an equivalent beam width product; calculating a calibration theory reflectivity factor of a metal ball based on a radar scattering cross section of the metal ball and the equivalent beam width product; acquiring actual detection echo data of the phased array radar on the metal ball under different working modes and beam directions, and calculating an actual reflectivity factor; and comparing the actual reflectivity factor with the calibration theory reflectivity factor, thereby completing calibration of the phased array weather radar. The application can quantitatively evaluate the reflectivity factor of the phased array weather radar in a non-Gaussian working mode, and improves radar detection performance.

The application discloses a constant beam adaptive beam forming method and system based on frequency difference, and the method comprises the following steps: segmenting FFT of time domain data of a target signal, converting the time domain data into frequency domain data, and calculating a data covariance matrix for each frequency point; estimating the azimuth of the target by using the data covariance matrix of each frequency point to obtain an estimated value of the target azimuth; generating a Gaussian random sequence with the same length as the array receiving signal as a reference signal, and reconstructing the array output of the reference signal according to the target azimuth estimated value; performing conjugate multiplication on the array output containing the target signal and the reconstructed array output of the reference signal to obtain the array output based on the frequency difference, and calculating the covariance matrix of the frequency difference output; calculating the weight value of the adaptive beam according to the covariance matrix of the frequency difference output to form the constant beam width adaptive beam. The application is simple and convenient, has small calculation amount, and can improve practicability.

Various aspects of the present disclosure relate to enabling a wireless device (e.g., a user equipment (UE), a base station) to support beam indication for wireless communication. The wireless device may receive signaling indicating at least one of spatial domain information or transmission power information for a duration, and identify one or more of the spatial domain information or a transmission power value for receiving or transmitting at least one transmission. The wireless device may communicate with a base station based at least in part on one or more of the spatial domain information or the transmission power information. As such, the present disclosure supports beam indication of one or more of a beam pattern, beam width, or power associated with a base station (e.g., a satellite) can be provided to the wireless device, thereby improving performance of the wireless device and a reliability of wireless communication.

The invention provides a broadband wide-axial-ratio circularly polarized antenna based on a tight coupling principle, and relates to the technical field of microstrip antenna structure design, the broadband wide-axial-ratio circularly polarized antenna comprises a first dielectric plate as a substrate, and a feed network capable of realizing one-to-four power division and 90-degree phase shift is printed on the lower bottom surface of the first dielectric plate; a second dielectric plate is arranged above the first dielectric plate in parallel, four arc-shaped metal patches are arranged on the lower bottom surface of the second dielectric plate to form a radiation unit, and the adjacent patches are tightly coupled through an interdigital capacitor; and a strip-shaped microstrip line is arranged on the upper top surface of the second dielectric plate. And the four coaxial feeder lines are vertically connected with the output end of the feed network and each metal patch, so that high-efficiency transmission of signals is realized. The upper surface of the first dielectric plate is provided with an annular metal cavity which is connected with the metal ground and is used for improving the axial ratio at a low elevation angle. According to the invention, wide impedance bandwidth and wide axial ratio bandwidth are realized, and the antenna has wide axial ratio beam width and high radiation efficiency.

The application discloses a satellite-borne wide-beam circularly polarized antenna with beam equalization and a satellite, and relates to the technical field of antennas.The antenna comprises a conical horn body, a partition type circular polarizer, a feeding port and an insulating base which are sequentially connected.The conical horn body is a conical structure with an umbrella-shaped metal radiation director, and the asymmetry of the traditional horn antenna directional diagram is effectively solved through multi-mode excitation of the circular polarizer, so that the beam equalization characteristic is realized.The loaded dielectric material is polytetrafluoroethylene, the mouth surface radius of the horn is equivalently reduced through dielectric loading, and the directional diagram beam width is widened.The partition type circular polarizer is adopted to realize good circular polarization effect.Through the joint action of the base and the umbrella-shaped metal radiation director, the interference of the antenna mounting surface on the wide-beam antenna radiation diagram is reduced, the requirement of the antenna on the mounting environment is lowered, the wide-beam circularly polarized radiation and reception of the antenna can be effectively realized, and the antenna has the advantages of wide beam, beam equalization and low axial ratio.

At a first communication device in a wireless communication network, reference signaling is received from a second communication device in two or more beams having the same direction, and one or more values associated with a direction from the first communication device to the second communication device for receiving the reference signaling are determined. The one or more values are determined from the received reference signaling. The direction has a higher accuracy than an accuracy of a beamwidth associated with the received reference signaling. The direction can be or include, for example, an angle of arrival or an angle of departure, and in the case of an angle of departure, signaling indicating the one or more values is transmitted by the first communication device to the second communication device or another component, such as a network device.

Aspects of the disclosure provide techniques and apparatuses for using keep-alive signaling for network energy saving in an idle mode. A network entity can transmit a keep-alive signal (KAS) to reduce the energy consumption of a network when the network is in an idle mode. In some aspects, the KAS can be a reduced synchronization signal block (SSB) that is sent more frequently than a full SSB. In some aspects, the KAS can have a different beam sweeping pattern and / or beam width from the full SSB.

The invention relates to the technical field of wireless communication, and provides a seabed node wireless communication anti-interference system, which comprises a high transmission rate signal module and a low transmission rate signal module based on a millimeter wave frequency band, the high-transmission-rate signal module is configured to transmit and receive network data streams and is used for seismic data transmission; the serial port signal module is configured to be used for time service signal transmission; the second pulse signal module is configured to be used for clock calibration; the antenna transmitting plane of the high-transmission-rate signal module intersects with the antenna transmitting plane of the low-transmission-rate signal module, and the intersection angle is larger than half of the sum of the half-power beam width of an antenna. The arrangement distance of the wireless communication module can be reduced to a greater extent in narrow working scenes such as seabed nodes so as to better adapt to space requirements and effectively eliminate signal interference, and stable transmission of high-speed seismic data, low-speed control and time service signals is guaranteed. The method provided by the invention has corresponding advantages.

The invention discloses an ultra-wide beam antenna based on multi-magnetic-current superposition, and belongs to the field of microwave communication. The technical problems that an existing wide-beam antenna is limited in beam coverage range, and vertical polarization and end radiation cannot be considered at the same time are solved. The antenna comprises a top-layer metal structure, a dielectric substrate, a bottom-layer metal structure and a metalized through hole which are stacked in sequence, and the antenna is integrally in bilateral symmetry and integrates a single-ended short-circuit double-sided resonator, a double-ended open-circuit double-sided resonator, a pair of double-ended short-circuit double-sided strip-shaped resonators and a grounded coplanar waveguide transmission line. Through feed excitation of the grounding coplanar waveguide transmission line, the three resonators respectively generate clockwise semicircular magnetic current, front and back bidirectional semicircular magnetic current and vertical magnetic current, and superposing of multiple magnetic currents realizes ultra-wide wave beam vertical polarization end radiation. The antenna has the advantage of extremely wide beam width, and can give consideration to both vertical polarization and end radiation.