75results about How to "Narrow beam" patented technology

Embodiments of the present invention relate to a compact optical assembly which improves collimation of light produced by multiple LED light sources in a light engine. A shaped primary reflector located over the light engine reflects the light toward a larger shaped secondary reflector. The shapes of the reflectors are selected to cooperatively produce a highly collimated light beam. Color mixing may be improved by providing a plurality of facets on the reflective surfaces of at least one of the primary reflector or the secondary reflector.

Embodiments of the invention relate to an antenna structure and are particularly suited to array antennas. Conventionally, an antenna of the cavity-backed slot-radiating type comprises a slot formed in an end of an electrically conductive enclosure, which slot may be energised by a radiating element in registration with the slot. A feed network may connect to the radiating element via a transmission line formed by a conductive track on a feed layer located between the enclosure and an electrically conductive cover. A slot is formed in the section of the cover that covers the end of the cavity in which a slot is formed, such that the two slots are of substantially the same size and shape. A problem with this structure is that the cavity is difficult to mould in one piece and it can be difficult to achieve alignment of respective slots; as a result it is relatively costly to manufacture. Also, it is difficult to insert dielectric material into the enclosure to adjust the performance parameters of the antenna. An antenna according to an embodiment of the invention employs an enclosure having an aperture in one end; in preferred arrangements the aperture provides the enclosure with a substantially open end, over which the cover is placed. The cover has a slot therein, of a smaller size than the size of the aperture presented by the open ended enclosure and the slot in the cover then acts as the radiating slot. The benefit is that it is then easier to insert dielectric material into the enclosure and the enclosure is easier to mould in one piece, leading to a potential cost reduction.

The invention discloses an air dielectric cylindrical lens antenna. The air dielectric cylindrical lens antenna comprises a metal disc-shaped parallel plate waveguide, a feed source antenna and arc-shaped metal support plates, wherein the metal disc-shaped parallel plate waveguide comprises an upper metal disc and a lower metal disc, the upper and the lower inner surfaces of the metal disc-shaped parallel plate waveguide are planes or arc-shaped surfaces, a central cavity of the metal disc-shaped parallel plate waveguide forms an air dielectric cylindrical lens, an annular boss is arranged below the edge of the upper disc of the metal disc-shaped parallel plate waveguide, the annular boss is arranged above the edge of the lower disc of the metal disc-shaped parallel plate waveguide, the feed source antenna is arranged between the two annular bosses, the feed source antenna is embedded in an arc-shaped groove between the arc-shaped metal support plates on the edges of the two metal discs, and the arc-shaped metal support plates are connected with the two metal discs through screws. The feed source antenna is a horizontal polarization gradient groove antenna or a horizontal polarization gradient groove antenna array.

The invention discloses a 1.2m feedback full-automatic portable emergency satellite communication antenna servo system which comprises a portable box, an antenna structure unit and an antenna control unit, wherein the antenna structure unit and the antenna control unit are arranged in the portable box; the antenna structure unit comprises an antenna mount, a six-section carbon fiber antenna main reflection surface and a feed source component support frame, wherein the six-section carbon fiber antenna main reflection surface and the feed source component support frame are connected to the antenna mount, an antenna auxiliary reflection surface is installed at the end part of the feed source component support frame, a feed source component support plate is installed in the middle of the feed source component support frame, a feed source component is installed on the feed source component support plate, a direction drive device and an elevation drive device are arranged in the antenna mount, and the feed source component comprises a feed horn, a polarizer, a duplexer and a polarization power transmission mechanism. The 1.2m feedback full-automatic portable emergency satellite communication antenna servo system is reasonable in design, convenient in implementation, increased in communication bandwidth, expanded in communication capacity, high in degree of intelligence and working reliability, convenient to carry and good in use effect, provides communication guarantee for the emergency handling and is convenient to popularize and apply.

The invention discloses a high-gain low-sidelobe highly directive antenna based on an artificial medium structure, comprising a microstrip antenna array and a radome composed of a plurality of grooved cross metal strip artificial medium structures; the grooved cross metal strip structure is printed on a tellite and is used as the radome of the microstrip antenna array; the structure can be equivalent to a homogeneous medium with plasma frequency by rationally designing the cycle and size of the metal structure; the equivalent index of refraction of the frequency of the electromagnetic wave is similar to zero when the frequency is in a certain frequency band. The energy of the electromagnetic wave radiated by the microstrip antenna array is collected in the normal direction of the radome when the electromagnetic wave passes through the radome to achieve the effect of gathering energy, thus improving the overall directivity and gain of the antenna and reducing the sidelobe of the antenna. The antenna not only has the advantages of high gain, good directivity, low sidelobe and the like, but also has the characteristics of good mechanical performance, convenient fixed mounting, simple processing, low cost, small structure size and the like.

An LED reflector lamp is provided wherein the lamp has a concave reflector substantially symmetrically arrayed about an axis, the reflector further having a focus and a bottom. A subassembly is coaxially aligned with said axis and comprises a light guide having a proximal end positioned outside of said reflector and a distal end positioned within said reflector at said focus. A first light source comprising at least one light emitting diode (LED) is positioned at said proximal end and operable to emit a first radiation when energized. A second light source comprising at least one phosphor is positioned at said distal end and operable to emit a second radiation having a different wavelength than said first radiation when energized by said first radiation from said first light source.

The invention discloses a high performance wide angle domain frequency scanning antenna based on microwave surface plasmon and is different form traditional frequency scanning antennas. According to the frequency scanning antenna, different metal unit structures are etched on a medium surface, electromagnetic waves are coupled to be microwave surface plasmons, and the microwave surface plasmons are radiated in a conduction process. The frequency scanning antenna is advantaged in that the frequency scanning antenna is manufactured through employing the printed circuit board technology, sub-wavelength thickness and a plane structure have properties of wide scanning angle domain, linear scanning angle distribution and strong designability, and the frequency scanning antenna can be applied to engineering practices.

The invention discloses a concave conformal dielectric resonator antenna and a working method thereof, and the antenna comprises a dielectric resonator, a ground plate, a dielectric substrate, a feedseam and a feed line. The ground plate is conformal with the dielectric resonator, and the dielectric resonator is fixed at the middle of ground plate. The upper and lower surfaces of the dielectric substrate are respectively attached to and cover the ground plate and the feed line. The center of the ground plate is provided with the feed seam in a mode of etching. The antenna is fed by the feed line, and then the electromagnetic wave energy is coupled and conducted to the dielectric resonator on the upper surface through the feed seam on the ground plate. The antenna has a very low profile due to the conformal structure, reduces the space occupied by the antenna in a vertical direction, is easy for processing, is of a wearable structure, is wide in application range, is flexible in application scenarios, has a higher gain and a narrower beam, and has a bigger bandwidth.

The invention provides a laser-guided moving-type unmanned aerial vehicle parking apron. Rollers are installed on rotating shafts on both sides of a moving-type parking apron body, and a hydraulic rodis arranged at each of four corners of the moving-type parking apron body. A lifting berth is installed at the upper ends of telescopic rods of the hydraulic rods, an H-shaped mark of a landing pointis arranged at the middle of the lifting berth, and a laser emitting port is formed in the middle of the H-shaped mark. A solar panel is arranged on each side of the lifting berth, and a pair of horizontal rotating motors is arranged on each side of the lifting berth. Horizontal rotating motor rotating shafts of the horizontal rotating motors are connected by connecting rods, vertical rotating motors are arranged in the side of the solar panel, and vertical rotating motor rotating shafts are connected with the middle portions of corresponding connecting rods. The laser-guided moving-type unmanned aerial vehicle parking apron can use laser to carry out landing and guiding, and the laser beam with high directivity, narrow beam and high anti-interference ability is utilized; and the apron can be self-moved, the landing plane can be automatically leveled, and therefore the adaptability in complex environments is greatly improved.

The invention discloses a flat plate array antenna for X frequency band, comprising a plurality of antenna array units. Each antenna array unit comprises a circularly-polarized cover, a tuning air cavity, a cross radiator slit, a waveguide mode type transmission cavity body, a square orthogonal mode coupler, a first strip line input terminal, and a second strip line input terminal. The tuning aircavity is disposed at the upper part of the cross radiator slit. Each slit of the cross radiator slit is arranged in a rotating manner at an interval of 90 D. The waveguide mode transmission cavity body is disposed at the lower part of the cross radiator slit. The square orthogonal mode coupler is disposed at the lower part of the waveguide mode transmission cavity body. The first strip line inputterminal is disposed at one side face of the square orthogonal mode coupler, and the second strip line input terminal is disposed at the other side face of the square orthogonal mode coupler, whereinthe two side faces are adjacent. The antenna array of the invention is advantageous in that efficiency is high, cross section is low, gain is high, wave beam is narrow, processing is easy.

The invention discloses a circularly-polarized high-gain antenna based on a folded plane reflective array technology, and relates to the technical field of electromagnetic fields and microwaves. The circularly-polarized high-gain antenna comprises a feed source, a main reflecting surface and an auxiliary reflecting surface. The feed source is located at the phase center of the main reflecting surface, the feed source is arranged at one side of the main reflecting surface, and the auxiliary reflecting surface is arranged at the other side of the main reflecting surface; the auxiliary reflecting surface directly faces the feed source and is parallel to the main reflecting surface; the main reflecting surface consists of a plurality of main reflecting surface units which are arranged into an array, and the auxiliary reflecting surface consists of a plurality of auxiliary reflecting surface units which are arranged into an array in order; the auxiliary reflecting surface unit comprises a first dielectric substrate, a second dielectric substrate, a top emission layer, a middle ground layer, a bottom receiving layer and a first bonding layer. According to the antenna, single-polarization transmission is realized, and meanwhile, the antenna has the function of a polarization converter; the antenna has the characteristics of high gain, low profile and narrow beam, and can radiate circularly polarized waves within a certain frequency band.

The invention discloses a channel state information feedback method, a base station, terminal equipment and a system. The channel state information feedback method comprises the steps that the terminal equipment receives a reference signal transmitted by the base station; the terminal equipment determines channel state information according to the reference signal; and the terminal equipment transmits the channel state information to the base station so as to enable the base station to determine a pre-coding matrix F, wherein the pre-coding matrix F=C1C2W, C1 is a first level pre-coding matrix, C2 is a second level pre-coding matrix, and W is a third level pre-coding matrix. The channel state information corresponding to the first level pre-coding matrix C1 comprises information of a beam, the channel state information corresponding to the second level pre-coding matrix C2 comprises long-term broadband channel information, and the channel state information corresponding to the third level pre-coding matrix W comprises instantaneous channel information. The channel state information feedback method can reduce the overall pilot and CSI (Channel State Information) feedback overhead and thus improves the stem throughput.

A portable acoustic warning device which projects a specific acoustic waveform towards a target, creating a narrow beam of sound that is highly selective, minimising exposure to users and bystanders, whilst enabling a controlled dosage of sound to be applied to the target. The design of the device is tailored to this waveform thus achieving a very high degree of directivity. It is not intended for communicating verbal messages. This waveform achieves maximum intensity at the target whilst using a relatively low sound pressure level; meaning that the exposure levels can be controlled to ensure they are within existing health and safety legislation. A laser range finder limits the sound level at the target to a pre-determined level. An integrated camera is used to aid aiming. Video footage is recorded with use; along with the sound level at the target, exposure duration, time, date and GPS coordinates.

The invention relates to an array antenna, which comprises a dielectric substrate, a reference formation and a dipole antenna array, wherein the reference formation is arranged at the back side of thedielectric substrate; the dipole antenna array is arranged at the front side of the dielectric substrate, and comprises a first antenna array element and a second antenna array element in parallel arrangement; each of the first antenna array element and the second antenna array element comprises a plurality of dipole units which are arranged at equal intervals and are connected in series; each dipole unit in the first antenna array element is in relative arrangement to each dipole unit in the second antenna array element; each dipole unit is connected with the reference formation; each dipoleunit realizes the power feed through a microstrip transmission line or coplanar waveguide; the dipole antenna array also comprises a line feeder arranged between the first antenna array element and the second antenna array element; and the line feeder is used for connecting the first antenna array element and the second antenna array element. By using a mode of combining the serial connection power feed and the parallel connection power feed, the insertion loss of a feed network can be reduced; and the antenna gain is ensured.

The invention discloses a millimeter-wave life detection alarm system and an alarm method for preventing children from being left behind in a vehicle, wherein the alarm system comprises a millimeter wave sensor mounted on the inner side of the vehicle body, An alarm control module electrically connected to the millimeter wave sensor and an alarm module electrically connected to the alarm control module, the millimeter wave sensor comprising a transmitting module and a receiving module, the alarm control module comprising a system control switch and a signal processing module. As soon as that invention detect the existence of life in the vehicle, the invention will send out an alarm sound to remind the surrounding personnel, and effectively solve the problem that the child, especially the 1-4-year-old infants stay in the car, lack of self-help ability, difficult to sound a distress or alarm technical problems.

The invention discloses a vehicle-mounted millimeter-wave anti-collision radar antenna system comprising a back focus antenna. A lens unit is fixed to the opened end of the back focus antenna, and a microstrip antenna is fixed to the narrow end; the lens unit comprises an emitting lens and a receiving lens; the microstrip antenna includes an emitting antenna and a receiving antenna, and the receiving antenna irradiates the receiving lens through three microstrip pastes arrayed horizontally; the emitting antenna is connected to a power amplifier, a directional coupler, a pressure controlled oscillator and a linear modulator sequentially; the receiving antenna is connected to a low noise amplifier, a low pass filter and an intermediate frequency unit sequentially; the microstrip antenna adopts microstrip wire feed, the microstrip antenna array performs feed in a manner of mixing serial connection and parallel connection. The system is low in production cost and can be produced in batches; in the horizontal direction, the wave beams are narrow, the wave beam covering area is ideal, and the gain is high; the feed system consumption is low, irradiating efficiency is high, and the system can be widely applied to millimeter-wave radars of vehicles of low and medium grades.

The invention discloses a beam forming method and device, and belongs to the field of wireless communication. The method comprises the following steps: determining a channel matrix of a first reference signal; using a product of a preset directional beam weight vector matrix and a directional beam weighted coefficient matrix as a model matrix of a beam forming weight; using a product of the model matrix of the beam forming weight and a detection reference signal coefficient matrix H<SRS> as a channel matrix of a data signal; determining the model matrix of the beam forming weight satisfying a constraint relationship as a beam forming weight matrix according to the channel matrix of the first reference signal, the channel matrix of the data signal and a preset constraint relationship between the channel matrix of the first reference signal and the channel matrix of the data signal; and performing beam forming processing on the data signal according to the beam forming weight matrix. Through adoption of the beam forming method and device, the problem of relatively small antenna gain of a transmitting end is solved, and the effects of obtaining narrower beams, concentrating energy and increasing the antenna gain of the transmitting end are achieved. The beam forming method and device are applied to an MIMO (Multiple-Input Multiple-Output) system.

A sterile scale is described suitable for automated use in animal cages. A case is covered by a flexible membrane that provides both sealing against pathogens and mechanical compliance for transfer of weight on an above weighing platform through a single sealed penetration in the membrane to a load cell in the case. The membrane comprises a perimeter that is attached and sealed to the case with a membrane frame, a penetration area, penetrated by a rigid weight-bearing element, and an isolating compliance area. A skirt on the weighing platform surrounds the case, protecting detritus from entering from below onto the membrane, while providing open-air movement. The weighing platform and case are easily separated permitting fluid-based sterilization of both. The weight-bearing element may contain an electrical connection from the case to the platform, through the membrane.

The invention relates to a communication system of an APT subsystem and a spacecraft, and belongs to the technical field of space communication. The APT subsystem comprises a first controller, a firstterahertz transceiver and a terahertz antenna array which are connected in sequence, wherein the first terahertz transceiver is used for modulating and demodulating terahertz waves; the terahertz antenna array is used for transmitting and receiving terahertz waves; and the first controller is used for controlling the first terahertz transceiver to capture, align and track another APT subsystem through the terahertz antenna array. According to the invention, the capture, alignment and tracking efficiency of the APT subsystem is improved. The communication system is used for communication in space.

The invention relates to a wireless coverage antenna unit. The wireless coverage antenna unit comprises a substrate; an oscillator which is arranged on the substrate for radiating electromagnetic waves; and a director which is arranged on the substrate for making the beam width radiated by the antenna unit in a default frequency band is not less than 180 degrees according to the structure, the size and the distance between the antenna unit and the oscillator, and restraining the radiation intensity of the antenna unit in the coverage of another antenna unit having a same frequency. The antenna unit provided in the invention has the advantage of good directivity, narrow-beam wireless coverage can be realized in the default frequency band to avoid the electromagnetic radiation on regions which do not need to be covered, and the signal intensity in the coverage area can be realized.

An elongated, indirect lighting module comprising a plurality of LEDs arranged along a longitudinal axis in a housing provided with a mounting element having an elongated shape in axial direction. The elongated lighting module further comprising suspension elements for suspended connection of the housing to a ceiling. Each suspension element has at a first end a first connector connected to the mounting element, and at a second, opposite end a second connector for connection to the ceiling. The suspension element via its first connector is displaceable along the longitudinal axis over the mounting element, and the LEDs are configured to issue light into a radial direction essentially away from both the mounting element and the suspension element and for a major part toward the ceiling.

The invention provides a method for transmitting and receiving data and a communication device. The method is applied to a plurality of network devices, such as a first network device and a second network device, so as to cooperatively transmit data to a terminal device. The method comprises the following steps: in a pre-allocation stage, the plurality of network devices pre-allocate beams or beamsets for the terminal device, i.e., pre-allocate airspace resources; in the real scheduling stage, the plurality of network devices send data to the terminal device through cooperation of the pre-allocated beams or beam sets. According to the application, the airspace resources are pre-allocated in the pre-allocation stage, the scheduling complexity can be simplified, and two modules, namely thenetwork equipment pre-allocation module and the network equipment independent scheduling module, are relatively independent by utilizing the characteristic that the airspace of the terminal equipmentis slowly changed, so the transmission delay and the processing delay are reduced, and the transmission performance is improved.