211 results about "Wide beam" patented technology

The invention relates to the technical field of communication, in particular to an airborne Tiantong phased-array antenna and an application method thereof. According to the method, phased-array antenna beams are driven to perform electronic scanning according to a geometric azimuth angle, beacon signal blind acquisition is performed in a preset airspace in a wide beam mode, and when an initial signal is detected, the mode is immediately switched to a narrow beam scanning mode; dynamically adjusting a phase weighting coefficient to realize pointing adjustment, so that a signal quality parameter is continuously converged in an optimal threshold interval; carrying aircraft maneuvering acceleration feedback is introduced, beam pointing offset is dynamically compensated based on a pre-constructed interference feature library, and signal fluctuation caused by a multipath effect is suppressed; and continuously checking a data validity flag bit of the main inertial navigation system, seamlessly switching to an antenna built-in inertial navigation data stream when a failure threshold is triggered, and activating a rapid recapture program to maintain zero interruption of a communication link. Through dual-source inertial navigation data fusion and intelligent beam control, rapid and accurate tracking of Tiantong satellites in an airborne environment is realized.

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 discloses a PT symmetrical hot-pressing resistance MEMS wind speed and wind direction sensor. The sensor comprises four groups of PT symmetrical MEMS resonators which are orthogonally distributed and have hot-pressing resistance feedback; the PT symmetrical MEMS resonator comprises two cantilever beam resonators with completely same structures, a coupling spring beam connected with the two resonators, and a constant current source connected with one resonator, each cantilever resonator comprises two anchor areas, a wide beam connected with the anchor areas, a narrow beam with a piezoresistive effect, a warped thin plate structure and external electrodes located on the two sides of the thin plate structure. Wind speed and wind direction signals are converted into rigidity change of the resonator array through mechanical action by means of a warped thin plate structure, and the rigidity change enables the PT symmetrical MEMS system to deviate from an EP point, so that system frequency splitting is caused. As the frequency splitting quantity of the PT symmetric system is in direct proportion to the square root of the disturbance quantity, the wind speed and direction sensor can detect tiny wind speed signals, and has the advantages of very high sensitivity, simple process, high integration level and the like.

Aspects of the disclosure relate to user equipment (UE)-assisted beam broadening in a wireless communication system configured to employ beamforming. A UE may determine downlink channel characteristics by monitoring for, receiving, and measuring a suitable downlink reference signal. Based on the channel characteristics the UE may select a wide beam corresponding to a set of narrow beams. The UE may then transmit a report identifying the selected wide beam by indicating a direction of the selected wide beam and an angular width of the selected wide beam. Other aspects, embodiments, and features are also claimed and described.

This disclosure describes procedures for UE and network on initial access, to ensure the normal operation of system and to obtain high energy efficiency and obtain high access reliability. Consider power efficiency, wide and narrow beams are considered in NTN systems to achieve more efficient DL / UL transmission scheduling. However, there may be EIRP split issue for beam differentiation. For example, 50%EIRP are allocated for wide beam and 50%EIPR are allocated for narrow beam, then there may be -3db loss compared with no EIRP split. In view of mentioned issue, novel schemes for Synchronization signal and PBCH design in NTN are mentioned in this patent.

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 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.

Lighting system having visible-light source including semiconductor light-emitting devices arranged for generating plurality of visible-light emissions having range of color points including cool to very cool white color point for daytime and warm to very warm white color point for nighttime. Optical system arranged for causing some visible-light emissions to have range of beam widths including relatively wide and narrow beam widths. Mounting system causing range of beam directions. Control system causing visible-light emissions to include daytime configuration having cool to very cool white color point and relatively wide beam width, and nighttime configuration having warm to very warm white color point and relatively narrow beam width. Daytime configuration includes control system for causing visible-light emissions to include lateral- or up-light emissions, promoting relatively high equivalent melanopic lux. Nighttime configuration includes control system for causing visible-light emissions to include down-light emissions promoting relatively low equivalent melanopic lux.

A device includes first, second and third elements fabricated on a common substrate. The first element includes an optical source, the second element includes at least one optical facet coupled to free space, and the third element includes a waveguide that optically couples the first element to the second element. The optical facet, having a compound III-V semiconductor material as a core and a dielectric material as a cladding, is characterized by a refractive index contrast between the core and the cladding that is greater or equal to 1. An optical beam exiting the facet is characterized by a central beam propagation axis and a FWHM beam divergence greater than 40 degrees referred to at least one axis perpendicular to the central beam propagation axis.

A relay node may receive a pattern index indicating a beam pattern. Further, the relay node may receive resource information indicating a beam type. Also, the relay node may receive one or more first beam indexes associated with the indicated beam pattern. On a condition that the indicated beam type is narrow and a beam index of the one or more first beam indexes corresponds to a wide beam type, the relay node may determine second beam indexes for a set of narrow beams associated with the beam index of the one or more first beam indexes corresponding to the wide beam type. Moreover, the relay node may determine a beam and time-domain resources for each of the determined second beam indexes based on the pattern index and resource information. Accordingly, the relay node may transmit data using the determined beam and at least one of the determined time-domain resources.

The invention relates to the technical field of sensor sensing, and discloses a microspur sensing method and system for an MEMS ultrasonic sensor array, and the method comprises the steps: carrying out the phase calibration of the MEMS ultrasonic sensor array, and obtaining a phase calibration parameter; performing near-field spherical wave phase compensation on the phase calibration parameter based on the macro target distance and the incident angle to obtain a near-field compensation parameter; controlling the MEMS ultrasonic sensor array to execute beam forming of wide beam scanning and narrow beam focusing according to the near-field compensation parameter to obtain a macro focusing sound field; transmitting ultrasonic waves to a rear vehicle target through the micro-distance focusing sound field and receiving a reflection signal, and performing vehicle feature recognition on the reflection signal to obtain a vehicle recognition result; and positioning calculation of the target angle and distance is carried out based on the vehicle identification result to obtain rear vehicle positioning data, and the angle resolution and the distance measurement precision in a microspur range are improved.

The invention relates to the technical field of antennas, and provides an antenna, a communication method and terminal equipment, and the method comprises the steps: attaching a metal floor to a first surface of a dielectric substrate; the first excitation element and the second excitation element are respectively arranged on the first side and the second side of the metal floor, and the sizes of the two elements are related to a target frequency band; an inner conductor and an outer conductor of the first feed assembly are correspondingly connected with a first feed point of the first excitation element and the metal floor respectively; an inner conductor and an outer conductor of the second feed assembly are correspondingly connected with a second feed point of the second excitation element and the metal floor respectively; the first feed assembly is used for providing first excitation current for the first excitation element; the second feed assembly is used for providing a second excitation current for the second excitation element; the first excitation current and the second excitation current with different phase differences can present different current distributions on the metal floor, so that the purpose of antenna radiation beam steering is achieved, the technical effect of wide beams is achieved, and thus space direction coverage on a target frequency band is achieved.

Methods, systems, and devices for wireless communications are described for beam measurement and selection using separate synchronization signal block (SSB) bursts for wide beams and narrow beams, where a periodicity of SSB bursts of narrow beams may be longer than a periodicity of SSB bursts with wide beams. A user equipment (UE) may predict narrow beam measurements (such as using an artificial intelligence or machine learning (AI / ML) model) at occasions of the wide beam SSBs that do not include the narrow beam SSBs. The UE may identify control resource set or remaining minimum system information resources, or random access channel resources for a random access transmission, based on the measured and predicted measurements.

Various solutions for initial access with enhanced beam configuration in wireless communications are described. A network node may configure a cell with at least one wide beam and one or more narrow beams. The wide beam is associated with a cell-defining synchronization signal block (CD-SSB) and each of the narrow beams is associated with a non-cell-defining synchronization signal block (NCD-SSB) or a channel state information-reference signal (CSI-RS). The network node may transmit the CD-SSB on the wide beam. Then, the network node may receive a random access request from an apparatus for initial access to the cell.

The invention provides an anti-interception communication access method, system and device, a storage medium and a program product, and relates to the technical field of wireless communication networks, and the method comprises the steps: generating a radio frequency signal through an intelligent array antenna based on a time slot index and a beam power index, and transmitting the radio frequency signal to a satellite, so as to obtain the service data of a service copy packet; the radio frequency signal comprises a sending signal corresponding to each time slot, and each sending signal carries a service copy packet; and in any two adjacent time slots, the intelligent array antenna sends corresponding sending signals in one time slot by adopting a wide beam mode and a high power mode, and the intelligent array antenna sends corresponding sending signals in the other time slot by adopting a narrow beam mode and a low power mode. Through the above mode, the orthogonality of the wave beam and the power can be fully utilized to avoid the situation that the signal is intercepted by an electronic reconnaissance satellite, the anti-interception performance of the aircraft is improved, and the risk that the aircraft is exposed is reduced.

The invention discloses a wide-beam omnidirectional circularly polarized antenna and a radio communication system comprising the same, and belongs to the technical field of linear communication antennae, the wide-beam omnidirectional circularly polarized antenna comprises a feed connector, a printed board feed balun, a conical hollow substrate, a feed printed board and a radiation printed patch; by adopting the split type conical substrate which is composed of the feed printed board at the top and the conical hollow substrate, connection and conduction of the feed printed board and other structures are facilitated, and the process cost is reduced while the process credibility is enhanced; the feed form of the antenna is set to be printed board balun feed, the microstrip line extending according to a certain curvilinear equation is arranged on the copper layer of the printed board balun, and the printed board feed balun is connected and conducted with the spiral radiation printed patch through the feed printed board, so that the performance requirements of low axial ratio and high gain of the antenna can be ensured, and the antenna can be widely applied to the field of antenna devices. And the technical requirements of wide wave beams can be met.

The invention discloses a dual-port coaxial feed circular polarization magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave satellite communication antennas. The antenna comprises a first metal patch layer, a dielectric substrate a, a second metal patch layer, a dielectric substrate b and a metal ground which are sequentially stacked from top to bottom, the second metal patch layer comprises four radiation patches which are arranged in a rectangular array, and each radiation patch is composed of a square patch and a circular ring patch at an inner corner; a metal through hole is formed in the dielectric substrate and is connected with the radiation patch and the metal ground, so that a magnetoelectric dipole radiation path is formed; the first metal patch layer is provided with a probe patch a, the center of the second metal patch layer is provided with a probe patch b, and the probe patch a and the probe patch b form two space orthogonal inverted L-shaped feed probes through a short column and a long column respectively; and the inner conductors of the two feed ports are respectively connected with the long columns of the two probes. The antenna has the advantages of wide impedance bandwidth, wide beam coverage, low profile and easy integration, and is suitable for a low-orbit satellite communication terminal.

The invention provides a method and a device for enhancing beam configuration in wireless communication. The network node may divide the total transmit power into a first transmit power and a second transmit power. The network node may then configure one or more wide beams, serving one or more user equipments (UEs) within one or more first areas covered by the wide beams to share the first transmission power. Furthermore, the network node may also configure one or more narrow beams to serve one or more UEs within one or more second areas covered by the narrow beams to share a second transmission power.

A pupil-replicating waveguide usable in a VR display may have a slab of transparent material, an input grating coupler supported by the slab at the center of the slab, with output gratings supported by the slab and surrounding the input grating coupler. The input grating coupler couples image light into the slab, which propagates in the slab by total internal reflections. The out-coupling grating or gratings spread the image light all around the input grating, providing a wide beam of image light illuminating the eyebox of the VR display.

A receiver system includes and antenna and a processor. The processor is further configured to establish initial contact with a satellite using a wide beam antenna setup for the antenna; determine a plurality of narrow beam antenna setups for the antenna based at least in part on satellite data from the initial contact; determine position coordinates and time information using position-navigation-time (PNT) data received from the plurality of narrow beam antenna setups; and provide the position coordinates and the time information.

Methods and devices are provided in which a synchronization signal block (SSB) pattern is transmitted on overlapping wide beams that include one or more auxiliary sequences that do not include physical broadcast channel (PBCH) payload. The auxiliary sequences may be transmitted on different time slots, for example different OFDM symbols, or different frequencies, or both. In some embodiments, for each SSB transmission, auxiliary sequences may be sent on a same frequency as the SSB, but different time slots or OFDM symbols. In some embodiments, the one or more auxiliary sequences are sent on the same time slot or OFDM symbol, but via a different radio frequency (RF) chain.

The invention discloses a log-periodic antenna and an ultra-wide-band dual-polarization low-profile conformal array antenna, and belongs to the technical field of design and manufacturing of ultra-wide-band antennas. The array element is formed by compounding and nesting two types of antennas including a miniaturized log-periodic antenna and a Vivaldi antenna, and the structure is multiplexed. According to the provided miniaturized log-periodic antenna, the broadband miniaturized conformal design is realized through composite loading methods such as array top loading, partial array bending, partial array loading dielectric blocks and the like. On the basis, the invention provides a design method for forming the dual-polarized antenna by nesting a Vivaldi antenna and a log-periodic antenna. A Vivaldi antenna is subjected to left and right block design, a radiation slot and an excitation slot are formed through splicing, and an assembly line of a log-periodic antenna is deployed on a left sector plate and a right sector plate of the Vivaldi antenna. According to the dual-polarization array forming mode, large-curvature conformality of the pitching surface is considered, and pitching surface wide-beam coverage and azimuth surface wide-angle scanning application can be achieved.

A RAP detection procedure that can be used to find the best narrow beam in an efficient manner. In a first step, an access point correlates an incoming signal with appropriate RAPs and then selects at least one candidate RAP for further processing in at least one set of narrow beams that all reside within the coverage area of a wide beam with which the candidate preamble is associated. For each candidate RAP, a second step is executed including narrow beamforming and a PRACH receiver chain including threshold comparison.

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 an unmanned aerial vehicle-mounted L-band high-gain omnidirectional miniaturized knife-shaped antenna, which comprises an antenna base and a composite substrate riveted on the antenna base, an upper oscillator and a lower oscillator are arranged on a first side surface of the composite substrate at intervals, a coupling oscillator is arranged on a second side surface of the composite substrate, and the coupling oscillator is connected with the antenna base. The antenna base is provided with a socket, the socket is connected with a coaxial cable, an outer conductor of the coaxial cable is welded with the lower oscillator, and an inner conductor of the coaxial cable is welded with the upper oscillator; on the basis of realizing a light-weight and small-volume structure, the antenna structure can have the performances of wide beam and high gain.

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to an early user equipment (UE) beam refinement scheme during initial access using msg1 repetition. In some aspects, a UE may beam-sweep an initial message of a random access procedure over respective UE narrow beams within an initial UE wide beam. A network node may select one of the UE narrow beams and transmit an indication of the selected UE narrow beam to the UE. The UE may then use the UE narrow beam for subsequent uplink and / or downlink communications.

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 present invention discloses a single-satellite positioning method combining wide and narrow beams, which belongs to the field of satellite navigation and positioning. In view of the constraint that single-satellite positioning can obtain limited position information, the present invention constructs a single-satellite positioning strategy combining wide and narrow beams. In the wide beam stage, the satellite transmits a broadcast signal to cover the entire positioning area, and locks the potential position point of the terminal by processing the leading sequence signal fed back by the terminal. In the narrow beam stage, the coverage area is divided into multiple quadrants and narrow beams are transmitted in sequence. The quadrant in which the terminal is located is determined by measuring the received signal strength of the leading sequence signal fed back by each beam, eliminating the ambiguity of the position point locked in the wide beam stage to determine the specific position of the terminal, and realizing accurate positioning of the terminal under the working condition that single-satellite positioning can obtain limited information. The present invention improves the utilization efficiency of positioning parameters based on the single-satellite positioning strategy combining wide and narrow beams, realizes accurate positioning based on a single satellite, simplifies the positioning parameter solution, and reduces overhead and cost compared to multi-satellite positioning.

The present application relates to the technical field of wireless communications, and in particular to a communication method and a related apparatus. The method comprises: determining a first sub-area and a second sub-area within a first area covered by a first satellite, wherein a sub-satellite point of the first satellite is located in the first sub-area, and the second sub-area comprises part or all of an edge area of the first area; and configuring a first wide beam within the first sub-area and configuring a first narrow beam within the second sub-area. By using the method provided in the present application, the impact on communication quality at the edge of a satellite coverage area when a wide beam is used to improve communication coverage can be mitigated.

Liquid crystal (LC) beam control devices utilize dispersion-shaping (DS) half-wave plates (HWPs) with specific physical properties to allow broadened beams to maintain significantly better color cohesion. This paper describes the advantages of using HWPs with appropriate thickness and birefringence, which makes them inefficient in the blue wavelength spectrum, thus reducing blue photon loss at the center of the broadened beam. This paper also describes combinations of vertically aligned LC cells and DS HWP structures for reducing color separation, accelerating relaxation time, and reducing ground-state scattering.