115 results about "Wide beam" patented technology

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 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 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.

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 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.

The application belongs to the field of satellite mobile communication, and specifically provides a wide-beam metal-resistant antenna for satellite communication to overcome the problem that communication is interrupted under the interference of a metal environment for the existing satellite communication antenna. The application adopts a design of laminated slot coupling feed, improves the back and forward radiation of the antenna through a metal reflector plate and a forward radiation plate to improve the gain, generates 90 degrees of self-phase shift through a Wilkinson power divider, feeds a rotationally symmetrical "H" type slot at the same time, introduces a metal aluminum ring to pre-compensate the metal environment, reduces the influence of the surrounding metal floor on the antenna, and the metal reflector plate and the conductive metal aluminum ring together form a magnetic dipole, which is complementary to the directional diagram of the feed plate as an electrode to widen the lobe and improve the gain at a low elevation angle. Furthermore, the application has the advantages of wide beam, good low-elevation circular polarization performance and metal resistance, and is more suitable for satellite communication in actual scenarios.

This invention relates to the field of antenna technology, providing a circularly polarized antenna element and its array. The circularly polarized antenna element includes a support structure, a radiating module, a feeding module, and a current perturbation structure. The radiating module is mounted on the support structure and has two feed points. The feeding module is also mounted on the support structure and is coupled and / or electrically connected to the radiating module through the two feed points, enabling the radiating module to emit circularly polarized waves. One end of the current perturbation structure is grounded, and the other end is coupled to the radiating module, grounding at least a portion of the unbalanced current in the radiating module. The two orthogonal signals generated by the feeding module are transmitted to the radiating module through the two feed points, enabling the radiating module to emit circularly polarized waves and achieve communication functionality. Simultaneously, the grounded current perturbation structure adjusts the magnitude and direction of the unbalanced ground current in the radiating module, balancing the current magnitude in various directions and positions of the radiating module, thus improving its wide beam angular-to-axial ratio performance.

In one method, a wireless transmit receive unit (WTRU) receives a SSB and / or one or more SIBs through a wide beam from a non-terrestrial network (NTN) satellite. The decoded SIBs may provide a set of reference locations for narrow beams and several RACH configurations (or SSB-to-RACH occasion (RO) mappings) for narrow beams provided against reference timings and satellite location. The WTRU determines a suitable RACH resource based upon one or more of (i) WTRU location, (ii) reference locations for narrow beams, (iii) current time, (iii) reference timings for RACH configurations (or SSB-RO mappings) and (iv) satellite location. The WTRU transmits RACH over the determined RACH resource. In some embodiments the SIBs are received in a narrow beam based on SSB MIB information. In other embodiments, a narrow beam is selected based on CSI-RS measurements.

A communication method and apparatus relate to the field of communication technologies, and are provided to enable a terminal device to better access a network device, and improve communication quality between the terminal device and the network device. The method includes: A first network device adjusts a beam from a first beam to a second beam when a first preset condition is met; and after adjusting the beam to the second beam, adjusts the beam from the second beam to the first beam when a second preset condition is met. The first preset condition is that in a coverage area of the first network device, a quantity of terminal devices whose moving speeds are greater than or equal to a first preset threshold is greater than or equal to a second preset threshold. A beam type of the first beam is a narrow beam, and a beam type of the second beam is a wide beam. The second preset condition is that in the coverage area of the first network device, the quantity of terminal devices whose moving speeds are greater than or equal to the first preset threshold is less than the second preset threshold.

In one method, a wireless transmit receive unit (WTRU) receives a SSB and / or one or more SIBs through a wide beam from a non-terrestrial network (NTN) satellite. The decoded SIBs may provide a set of reference locations for narrow beams and several RACH configurations (or SSB-to-RACH occasion (RO) mappings) for narrow beams provided against reference timings and satellite location. The WTRU determines a suitable RACH resource based upon one or more of (i) WTRU location, (ii) reference locations for narrow beams, (iii) current time, (iii) reference timings for RACH configurations (or SSB-RO mappings) and (iv) satellite location. The WTRU transmits RACH over the determined RACH resource. In some embodiments the SIBs are received in a narrow beam based on SSB MIB information. In other embodiments, a narrow beam is selected based on CSI-RS measurements

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 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.

The invention provides a wide-beam high-gain microstrip antenna, and belongs to the technical field of wireless communication and antennas. Comprising a metal patch, a dielectric substrate and a metal parasitic patch, the metal patches are divided into a front part and a back part which are alternately placed on the front surface and the back surface of the dielectric substrate, namely, the metal patches with different widths are alternately arranged on the front surface and the back surface of the dielectric substrate, and the current distribution and impedance characteristics are adjusted through the gap structure to realize broadband matching and high-gain radiation; the metal parasitic patches are placed on the front face of the dielectric substrate and serve as a reflector and a director respectively, and a wide-beam directional radiation pattern is formed. The microstrip antenna provided by the invention can realize the characteristics of wide beam and high gain at the same time, can cover 2.12-2.78 GHz through the collaborative design of gap coupling and parasitic units, and realizes the impedance bandwidth exceeding 26%; the antenna can be expanded to any frequency band; a single-layer board integrated structure is adopted, excellent radiation performance is kept, and meanwhile, the antenna has the remarkable advantages of being low in profile, high in integration level and low in manufacturing cost.

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.

Methods, systems, and devices for wireless communications are described that provide for synchronization signal block (SSB) transmissions in a non-terrestrial network (NTN) using a relatively wide beam and data communications via relatively narrow beams. A transmitting satellite in a NTN may transmit system information blocks that correlate SSB or reference signal transmissions to particular random access channel (RACH) resources. The SIBs may indicate RACH resources associated with different user equipment (UE) locations that correspond to narrow beams, or may indicate RACH resources associated with different CSI-RS resources. A particular narrow beam may be selected based on a location of the UE and a RACH resource that is associated with that location. In cases where a beam is a moving beam, and the location associated with the RACH resource may be based on a reference time point and an ephemeris of the transmitting satellite.

Disclosed is a method performed by a network node. The method comprises receiving, from a coverage enhancing device (CED), control signalling indicative of the CED retransmitting an incident signal as a disjoint wide beam comprising a plurality of subbeams.

An apparatus (100) for use in an optical wireless communication system comprises: a wide beam light source (L5): two or more narrow beam light sources (L1-L4) configured to emit in a different direction, wherein a combined field-of-view. FoV, of the narrow beam light sources (L1-L4) is covered by a FoV of the wide beam light source (L5); a plurality of switches (S1-S5) configured to turn on or off a corresponding one out of the 5 light sources (L1-L5) individually; a receiver (RX) configured to receive one or more feedback signals from a remote device (200); and a controller (CTR) configured to control the plurality of switches (S1-S5) via a control signal; update the control signal based on the one or more feedback signals received by the receiver (RX): carry out a beam selection procedure by sending test signals via the wide beam light source (L5) and one or more 10 narrow beam light sources (L1-L4) to the remote device (200) to enable a selection of one out of the narrow beam light sources (L1-L4) for establishing data communication with the remote device (200).

The present disclosure relates to the technical field of antennas, in particular to a microstrip antenna unit and a spaceborne phased array antenna. The microstrip antenna unit is applied to the spaceborne phased array antenna. The microstrip antenna unit comprises a ground plate, a dielectric layer arranged on the ground plate, and a radiation patch arranged above the dielectric layer. The radiation patch is circular in whole, concentrically provided with a fan ring-shaped through slot, and at least provided with two open slots at the edge. The radiation patch is used to form a circularly polarized wave through feeding. One or more through holes are arranged at the opening of the fan ring-shaped through slot of the radiation patch, forming a plurality of current paths from the feeding position of the radiation patch to the edge of the radiation patch. The present disclosure can simultaneously realize wide beam, uniform radiation, low profile, high reliability, easy scale array, strong engineering implementation, and has wide application value.

The active light beam system is designed to improve the visibility of multi-lane vehicles. On highways, main roads, and rural roads, the active light beam system is automatically activated in conjunction with the hazard warning lights when traffic jams are expected. Simultaneously, the relatively large, two-part mirrors, particularly on multi-lane vehicles over 3.5 tons, are integrated to provide an immediate, intermittent yellow warning to the rear, while still allowing for continued rearward visibility. The third brake light, mounted on top of the vehicle, also features a pivoting light beam module with a vertical beam that can move up and down. This entire unit, preferably consisting of yellow warning lights, can provide even clearer warnings to following traffic and will significantly reduce the number of horrific rear-end collisions involving trucks.The 1.5 m long horizontal light beams also allow for better estimation of distances when forming an emergency lane. The warning colors of the vertical and horizontal light beams may vary depending on the country. Upon introduction of this new system, the unwarranted use of hazard warning lights (such as during loading and unloading operations, double parking, etc.) should be subject to stricter penalties. High fines and 1-2 points on the driver's record should be mandatory to increase awareness of the warning system's use and ensure it is only used in emergencies. The active light beam system can also be used on watercraft, with significantly more compact and preferably four rotating light beam modules integrated or mounted laterally at the front and rear of the hull.Up top, oscillating light beam modules can be used at the front and rear, producing customized and color-coded vertical beams of light that achieve optimal range. For ships without radar support, these modules visually widen the beam, effectively preventing collisions in poor visibility. Additionally, they can optimize visibility for rescue vessels in emergencies. For aircraft, rotating light beam modules are installed on both sides of the leading and trailing wing sections, generating horizontal beams the length of the wings. At the rear of the tail, an oscillating light beam module with a battery unit is integrated, producing vertical beams of light capable of covering an angle of more than 180 degrees. These systems can be used on airfields, during takeoffs and landings, or in flight to enhance visibility, for example.to increase in case of instrument failure.

This invention discloses a millimeter-wave wide-beam DRA, a wide-angle beam scanning phased array, and their design methods. The DRA consists of a DR and a microstrip coupling slot located directly below the DR. This invention enables the non-exciteable DRA to achieve TE by setting the dimensions of the slot and the DR. 112 The resonant frequency of the mode is close to that of the slot operating mode, and the field inside the DR will exhibit a similar behavior to that of the TE mode. 112 The field distribution of the mode forms an equivalent magnetic current parallel to the ground plane, thereby achieving wide beam characteristics in the E-plane and H-plane; moreover, arranging multiple such small-sized DRA units at equal intervals can form a linear phased array in the E-plane (H-plane), whose beam can be scanned from -72° to +72° (-65° to +65°), with a gain ripple of 2.5dB (0.5dB), and the present invention does not require any parasitic structures or additional active control circuits.

A light fixture is provided for use in photographic chambers that provides a combination of high flux, the ability to place / tuck the light fixture against a wall, and the ability to flash / tune the light fixture dynamically. The light fixture can use an energy efficient light source that generates far less heat than traditional mercury arc based lamps. The light fixture is modular and can be daisy chained to supply power and / or control signals to multiple attached light fixtures. Individual light fixtures may be joined together to form an array of light fixtures. The light fixtures may utilize the digital multiplex DMX512 standard for digital communication networks for controlling the light elements within the fixtures. The light fixture has a light output that is capable of providing a wide beam angle.

The present application relates to a kind of wide beam spot high-flux additive manufacturing and cladding device and its working method, belong to material surface engineering field, external fiber access fiber interface input laser, laser sequentially passes through collimating lens, DOE diffractive optical element, converging lens and protective lens, the laser beam of wide beam spot is output at nozzle outlet, spot width is 20-40mm.Two powder feeding tanks are connected on the nozzle powder feeding interface by powder feeding pipe, cooling water pipe is connected on multiple water cooling interfaces to form circulation, and external protective gas is connected on the protective gas interface to provide central protective gas.The present application can efficiently carry out additive manufacturing and cladding to large workpiece with laser beam of spot width 20-40mm, obtain metallurgical bonding single-layer or multi-layer additive manufacturing and cladding layer, and also can obtain high-flux sample array with different components by continuous and accurate control of composition, provide suitable composition and efficient protection technology for large workpiece working in extreme environment.

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.