491 results about "Antenna gain" patented technology

The invention relates to the technical field of vehicle-mounted antennas, and aims to solve the technical problem of low antenna gain. In order to solve the technical problem, the invention provides the double-frequency automobile glass antenna applied to vehicle-mounted satellite navigation. According to the invention, an intermediate dielectric layer is stacked below an outer glass dielectric layer; the inner glass dielectric layer is stacked below the middle dielectric layer; the first patch is attached between the outer glass dielectric layer and the middle dielectric layer; the first patch is provided with four fan-shaped grooves penetrating through the thickness of the first patch; the second patch is attached between the middle dielectric layer and the inner glass dielectric layer; the second patch is provided with four linear grooves penetrating through the thickness of the second patch, and the four linear grooves are distributed in a cross shape; the fan-shaped grooves and the straight-line-shaped grooves are arranged in a one-to-one correspondence mode, and orthographic projections of the straight-line-shaped grooves are covered by orthographic projections of the fan-shaped grooves The feed patch is attached to the lower surface of the inner glass dielectric layer and is used for feeding; and the PCB layer is attached to the lower surface of the feed patch. The antenna covers two resonance points, and the antenna gain is high.

The invention provides a method and a device for predicting influence of sea wave fluctuation on signal intensity based on ship data. The method provided by the invention comprises the following steps: acquiring multi-attitude angle data of a ship based on a nine-axis inertial measurement unit; the multi-attitude angle data comprises a rolling angle, a pitch angle and a yawing angle; establishing a Cartesian coordinate system taking the gravity center of the ship as an original point; based on the multi-attitude angle data, calculating spatial transformation of the antenna position in the Cartesian coordinate system through an automatic spatial transformation algorithm to obtain the transformed antenna position; determining the direction of the transformed antenna through vector operation by combining the initial orientation of the antenna and the position of the transformed antenna; and determining a corresponding angle through an angle resolving algorithm based on the initial antenna direction and the transformed antenna direction, matching a corresponding antenna gain in an antenna gain database based on the angle, and determining a signal strength change prediction value based on the antenna gain.

The invention discloses a microwave radio frequency waveform array optimization method, and relates to the technical field of signal processing, and the method comprises the steps: S1, monitoring an original link of a target multi-carrier system in real time, obtaining channel state data from the original link, screening out the channel state data, and marking the channel state data as an abnormal link segment; s2, calculating an antenna gain and a compensation coefficient by using a minimum variance undistorted response method; s3, applying each compensation coefficient to a corresponding abnormal link section to obtain an actual gain value; s4, compensation coefficient numerical value supplementation is carried out on the actual gain values which do not reach the distribution gain values; and S5, marking the abnormal link section reaching the distribution gain value as a correction link section, and reapplying the correction link section to the original link to generate channel correction data. According to the method, the antenna gain and the beam forming are optimized by monitoring in real time and using the MVDR method, so that the system can dynamically adjust the beam direction among a plurality of link sections, and the method has the advantages of reducing beam forming offset and being capable of correcting the system in real time.

The invention belongs to the technical field of maritime wireless communication. The invention provides an evaporation waveguide and scatter communication mode discrimination method based on measured data. According to the embodiment of the invention, the method comprises the steps: setting a threshold value of a difference between a troposphere scattering path loss simulation value of a troposphere propagation prediction model and an actual measurement path loss average value according to the parameters, such as a communication distance, a working frequency, a transmitting antenna gain and a receiving antenna gain; and according to an evaporation waveguide and troposphere scatter communication mode discrimination criterion, a current offshore beyond visual range communication mode is accurately discriminated. According to the method, the maritime beyond-visual-range communication system can fully utilize the evaporation waveguide to reduce the power consumption of the communication system or improve the communication rate, and key technical support can be provided for performance improvement of the maritime beyond-visual-range communication system.

The utility model provides a terminal antenna integrating low orbit and Tiantong satellite communication, which is characterized in that a fixed radiator and a movable radiator are arranged, so that the movable radiator is rotatably connected to the fixed radiator, and a movable radiation arm on the movable radiator is switched to be in a contact connection state with a fixed radiation arm by rotating the movable radiator; when the movable radiation arm is in contact connection with the fixed radiation arm, the terminal antenna is in a low-orbit satellite communication mode; when the movable radiation arm and the fixed radiation arm are not in contact connection, the terminal antenna is in a Tiantong satellite communication mode, and meanwhile, the disconnected movable radiation body can play a guiding role in a Tiantong frequency band, so that the gain of the Tiantong frequency band is improved. The technical problems that in the prior art, an adjustable handheld terminal antenna integrating low orbit and Tiantong satellite communication is low in gain, the movable end and the fixed end of the terminal antenna are abraded and loosened after frequent drawing and pulling are carried out in use, the structural strength of the terminal antenna is reduced, and the reliability is insufficient are solved.

A broadband 4T4R automobile radar antenna disclosed by the present invention comprises an upper-layer radiation plate and a lower-layer feed plate, the upper-layer radiation plate is provided with a plurality of horn mouths and a plurality of EBG choke grooves, the horn mouths and the EBG choke grooves are distributed at intervals in a staggered manner, each horn mouth is internally provided with a plurality of radiation slots at unequal intervals, and the upper-layer radiation plate is provided with a plurality of feed slots. A waveguide feed port is arranged on the lower surface of the lower layer feed panel; compared with the prior art, in order to ensure the antenna gain, the choke design in the EBG form is adopted between the antenna units, the transmission of surface waves is effectively restrained, and the isolation degree between the antenna units is improved; the horizontal plane realizes a good gain effect by accurately optimizing taper pin distribution of the slot array and amplitude-phase excitation of the feed network, and has better sidelobe envelope directional diagram characteristics; and the width of the lobe on the horizontal plane is adjusted by adjusting the inclination angle of the horn mouth, so that the width reaches 63 + / -3 degrees, and the gain effect is effectively improved.

The invention belongs to the technical field of high-frequency millimeter wave wireless communication, and discloses a high-frequency millimeter wave three-dimensional integrated antenna array based on an LTCC (Low Temperature Co-Fired Ceramic) process, which comprises a transition interface layer, a feed layer and a radiation layer which are sequentially stacked together from bottom to top, the radiation layer is provided with N step radiation resonant cavities which are mutually independent and face a free space and are in an inverted pyramid shape, the feed layer is provided with a first excitation module, a broadband H-face SIW power divider and a second excitation module which are communicated in sequence, and the transition interface layer is provided with a waveguide transition interface step resonant cavity which faces a metal waveguide and is in an inverted pyramid shape. The waveguide transition interface stepped resonant cavity is communicated with the first excitation module; the waveguide transition interface stepped resonant cavity, the first excitation module, the broadband H-plane SIW power divider, the second excitation module and the stepped radiation resonant cavity form a bidirectional transmission path of electromagnetic waves. According to the invention, broadband matching can be realized, high-order resonance in the cavity can be suppressed, and the antenna gain is higher.

The invention provides a communication device, a communication method, a communication system, electronic equipment and a storage medium, which are applied to the technical field of communication and are used for solving the problem that the coverage range and the antenna gain of an existing intelligent antenna cannot meet the use requirements of different use environments. The communication device comprises a multiplexer and a plurality of antenna structures. The multiplexer comprises a common end and a plurality of selection ends. The common end of the multiplexer is coupled with one radio frequency channel, and the common end is used for being switched and conducted with different selection ends in the plurality of selection ends to form a plurality of paths. The multiple antenna structures comprise phased-array antennas, the multiple selection ends comprise first selection ends, and the phased-array antennas are coupled with the first selection ends. The plurality of antenna structures further comprise an omnidirectional antenna, the plurality of selection ends further comprise a second selection end, the omnidirectional antenna is coupled with the second selection end, and / or the plurality of antenna structures further comprise a directional antenna, the plurality of selection ends further comprise a third selection end, and the directional antenna is coupled with the third selection end.

According to an aspect, there is provided a terminal device comprising means for measuring signal quality (300) of a non-serving cell (232); determining based on said signal quality a beam (310) for said non-serving cell; determining, for the non-serving cell, a first antenna gain (320) obtainable with said beam if the non-serving cell is added as a secondary cell in multicarrier connectivity with a serving cell; transmitting to a base station of the serving cell information on said determined first antenna gain (330).

The invention relates to the technical field of communication antennas, in particular to a radiation unit of an integrated feed network and a base station antenna. The radiation unit comprises a radiation body, a feed structure and a balun structure, the balun structure is located below the radiation body and is provided with a balun cavity with two open ends, the balun cavity comprises a first balun cavity, the first balun cavity is arranged below the radiation body, and a feed sheet of the feed structure comprises a combiner, a phase shifter, a power divider or a filter and is arranged in the first balun cavity. According to the scheme, the Balun structure of the antenna array part is fully utilized, the appropriate feed network is integrated into the Balun structure, under the condition that the array size is not increased, the layout space of the feed network is increased, the complexity of the layout space of the feed network is reduced, meanwhile, the antenna gain is improved, and the reliability and consistency of the antenna are improved.

The invention discloses a narrow pulse ns-level time delay compensation type plane reflection array antenna, and belongs to the technical field of antennas. The array antenna comprises a reflective array antenna and a feed source, and each array element in the reflective array antenna performs corresponding time delay compensation on electromagnetic waves emitted by the feed source according to the distance between the array element and the feed source so as to improve the gain of a reflective wave beam in an expected direction. According to the invention, a time delay type compensation method is adopted to enable the pulse signals fed into the plane reflection antenna array to realize simultaneous, equal-amplitude and same-phase superposition in a far field, so that the time domain pulse distortion phenomenon is avoided, the time delay compensation of electromagnetic waves fed into the plane reflection antenna array can be effectively realized, and the antenna gain and the fidelity of received signals are improved.

The utility model provides a satellite antenna structure and a satellite communication device, and relates to the technical field of satellite communication. The satellite antenna structure provided by the utility model comprises a plurality of antenna array surfaces, the angles of the plurality of antenna array surfaces are different, and the plurality of antenna array surfaces can work independently; each antenna array surface is used for forming a beam coverage area; according to the invention, the corresponding wave beam coverage areas are respectively formed at different angles through the plurality of antenna array planes, so that the whole airspace is correspondingly divided into the plurality of sub airspaces, the coverage of the whole airspace is realized, the scanning range is improved, the angle required by each antenna array plane during scanning is reduced, the scanning loss generated during large-angle scanning is reduced, and the scanning efficiency is improved. The antenna gain is improved; and secondly, the plurality of antenna array surfaces can independently work to generate wave beams, so that the satellite antenna structure can generate a plurality of wave beams at the same time, thereby obtaining a wider wave beam coverage range at the same time, and improving the scanning efficiency.

The invention relates to the technical field of underground communication, in particular to an underground deterministic network optimization scheduling method. According to the method, underground roadway humidity, electromagnetic interference and channel blocking data are obtained in real time, a blocking state distribution diagram is generated, a reconfiguration demand threshold value is determined, and then a data packet dynamic reconfiguration sequence is formulated; dynamically adjusting time slot division granularity and antenna gain parameters by comprehensively evaluating multi-path reflection interference, dust influence and an equipment moving track, and generating an optimized time slot allocation scheme; and finally, adaptively adjusting time slot configuration according to a comparison result of the signal attenuation dynamic distribution and a preset threshold value. According to the invention, the dynamic influence of the underground complex environment on the communication quality is effectively overcome, the reliability, real-time performance and network resource utilization efficiency of data transmission are remarkably improved, and reliable communication guarantee is provided for mine safety production.

The invention belongs to the field of positioning identification, and particularly relates to a handheld equipment label space positioning identification system and method based on the RFID technology, and the system comprises a label signal obtaining module, a moving track module, a label positioning module and a secondary correction module. Wherein the label signal acquisition module acquires a target label signal space by using a dynamic time slot allocation strategy in combination with a phase hopping algorithm; the moving track module obtains a compensated handheld dynamic track point sequence according to a preset target area two-dimensional model and IMU (Inertial Measurement Unit) data; the label positioning module obtains an initial relative position space of the handheld label and the multi-target label according to the target label signal space; and a secondary correction module carries out secondary correction on the initial position space by using the region correction vector space and the corrected antenna gain directional diagram, finally, a required multi-target relative position space is accurately obtained, and efficient and accurate label space positioning identification is realized.

A radio frequency antenna gain measuring apparatus includes: first and second antennas; antenna positioners to position the antennas; a central controller to: control the antenna positioners to position the first and second antennas, control the linear motion positioner to vary the separation distance, and receive information from the distance meter; and an antenna gain processor to: receive information from the central controller and the first and second radio frequency transmit and receive electronics device, and determine the gain of the first and second antennas based on the third-order scattered signal as a function of the separation distance.

The embodiment of the invention relates to the field of antenna calibration, in particular to an antenna gain calibration system and method based on Rydberg atoms, and the system comprises a frequency stabilization module of a detection light source, a light path module, a microwave module, a signal detection module and a darkroom. A frequency stabilization module of the detection light source is used for stabilizing the laser wavelength of a semiconductor laser in a light path module, so that the laser wavelength is suitable for detection light of a Rydberg electromagnetically induced transparency (EIT) system; the light path module is used for generating coupling light and detection light; the coupling light and the detection light are oppositely emitted in an alkali metal atom gas chamber in the darkroom, alkali metal atoms in the alkali metal atom gas chamber are excited to be in a Rydberg state through two-stage excitation, and an EIT signal window needed by an experiment is obtained; the microwave module is used for generating and transmitting a microwave signal to control a microwave electric field in an experiment, and the microwave electric field influences an EIT signal; the signal detection module is used for converting the detection light into an electric signal, and the electric signal is collected through an oscilloscope in the signal detection module so as to be analyzed.

The invention discloses an antenna far field test system and method based on weather radar base data, and relates to the technical field of weather radar test. The transmitting antenna is mounted on the first antenna turntable and rotates along azimuth, pitching and polarization axes; an antenna to be tested and a standard horn antenna are installed on a second antenna rotary table through a radar receiver, the aperture faces of the antenna to be tested and the standard horn antenna form an included angle of 180 degrees, mechanical axes are coaxial, and the antenna to be tested and the standard horn antenna rotate along azimuth and pitch axes. The data processing device is connected with the radar receiver. The testing process is simplified, and the equipment cost and the maintenance cost are remarkably reduced. The test time is shortened, and the test precision of gain, beam width, sidelobe level and the like of the to-be-tested antenna is improved. The whole system has wider adaptability in practical application and is not limited by specific climate conditions. The test process is accelerated, and errors caused by human factors are reduced. The method has the advantages of simplicity in operation, high automation degree, high adaptability and the like, and the measurement precision and the test efficiency of antenna performance parameters are remarkably improved.

Method comprising:receiving, from a first cell of a satellite, a handover command triggering a handover of a terminal from the first cell of the satellite to a second cell of the satellite and an assumed location of the terminal;determining an actual location of the terminal;checking one or more of the following conditions applies: the actual location of the terminal deviates from the assumed location by more than a first threshold, and the actual location of the terminal is on the side of the first cell of the coverage boundary and remote from the coverage boundary by at least a second threshold;preventing the terminal from performing the handover if at least one of the one or more checked conditions is fulfilled.

The utility model relates to a broadband wide-beam horn antenna, which comprises an antenna main body, a feed port, a feed probe, a polarizer, a waveguide and a beam widening structure, the antenna body is in a cuboid shape with an opening in the upper middle end inside, through holes are formed in the left side face and the right side face of the antenna body, feed ports are connected to the through holes, feed probes are arranged in the feed ports, a polarizer is vertically connected to the bottom face inside the antenna body, and the polarizer is located between the two feed probes. The open end of the antenna main body is connected with a waveguide, and the inner diameter of the waveguide is gradually increased along the direction close to the antenna main body to form a horn shape with a big-end-down opening; the side surface of the waveguide is provided with a wave beam widening structure which extends outwards. The antenna with the structure has the advantages that the antenna with the structure can achieve the wide-beam antenna gain of 1.5 dB within + / -60 degrees and the wide-beam antenna gain of-0.5 dB within + / -70 degrees; and the working bandwidth can reach 10%. And the diameter is only 1.27 times of the wavelength of the lowest working frequency.

The invention relates to the technical field of scatter communication, in particular to a narrow-edge traveling wave waveguide slot array antenna. Comprising an antenna housing which adopts a flanging design to protect an antenna surface; the slot radiation port is composed of a rectangular port array with horizontal short edges; the coupled feed port is composed of a rectangular port array with horizontal short edges; and the power division network is formed by cascading H-surface T-shaped power dividers and is formed by equally-divided and unequally-divided one-to-two power dividers. The problems that an existing panel antenna is low in gain, large in size and heavy in weight are solved.

The utility model relates to the navigation antenna field, and discloses a high precision GNSS antenna comprising an upper cover, a pedestal, a medium antenna, a PCB circuit board, a shielding cover and a reflection sheet, the upper cover and the pedestal are covered to form an accommodation cavity, the medium antenna, the PCB circuit board, the shielding cover and the reflection sheet are accommodated in the accommodation cavity, and the reflection sheet is arranged in the accommodation cavity. The dielectric antenna is installed above the PCB and electrically connected with the PCB, the shielding case is installed below the PCB, and the reflector plate is located below the shielding case. The utility model has the following advantages: the size is small and can be adjusted according to the installation position on the vehicle; the structure is stable, and the installation mode can be adjusted according to different scenes; the installation scenes are diversified and are not easily influenced by the external installation environment; under the action of the reflector plate, AR, PCO and PCV are ensured, and the gain and bandwidth of the antenna can be improved; the navigation system is diversified, and different frequency band signals of different navigation systems can be adjusted and received according to requirements.

The embodiment of the invention provides a base station antenna and a base station. The base station antenna comprises a first antenna array, a metasurface lens and a second antenna array, the metasurface lens is located between the first radiator of the radiation unit of the first antenna array and the second antenna array, and is used for reflecting a radiation signal of the first antenna array and carrying out wavefront phase regulation and transmission on the radiation signal of the second antenna array. Therefore, the radiation signal of the second antenna array penetrating through the metasurface lens is approximately focused into a plane wave. The base station comprises the base station antenna. According to the scheme, a common-caliber array antenna can be realized, the defects of mutual shielding of antennas and mutual interference of antenna performance are avoided, the problem of structural interference can be avoided, and the antenna gain can be improved.

Method comprising:receiving, from a first cell of a satellite, a handover command triggering a handover of a terminal from the first cell of the satellite to a second cell of the satellite and an assumed location of the terminal;determining an actual location of the terminal;checking one or more of the following conditions applies: the actual location of the terminal deviates from the assumed location by more than a first threshold, and the actual location of the terminal is on the side of the first cell of the coverage boundary and remote from the coverage boundary by at least a second threshold;preventing the terminal from performing the handover if at least one of the one or more checked conditions is fulfilled.

The invention provides a communication method and device. The method comprises the following steps: receiving an SSB from network equipment; determining a first search space according to the SSB, and receiving a first system message according to the first search space; the first system message is used for configuring information related to random access; after the random access request is sent, a second system message is received, and the second system message is used for configuring cell-related information; the first coverage area of the first system message is larger than the second coverage area of the second system message, and / or the first antenna gain of the first system message is smaller than the second antenna gain of the second system message. According to the method, the first coverage area of the first system message received before the random access is relatively large, so that more terminal devices in a cell can obtain information required by the random access. The second coverage area of the second system message received after random access is relatively small and / or the second antenna gain is relatively large, so that the transmission performance is improved, and the initial access performance is improved.

A link reachability determining method to enable a multi-link device to determine whether a link is reachable in an uplink direction, includes: a multi-link STA receives a first frame sent by a multi-link AP on a first link, where the first frame includes transmit power and antenna gain information of each AP of the multi-link AP; and then, the multi-link STA determines, based on the first frame, whether each of M links supported by the multi-link STA is reachable in an uplink direction.

The invention relates to the technical field of wireless communication, and particularly discloses a flight ad hoc network link evaluation method, which comprises the following steps: constructing an antenna model, a transmitter model, a receiver model and an interference model; determining a topological structure according to the real poses and the deviation poses of any two communication nodes in the flight ad hoc network; corresponding antennas are determined according to the real poses and the deviation poses of any two communication nodes in the topological structure, and antenna gains are obtained according to the antennas and antenna directional diagrams in the antenna model; respectively confirming link loss, receiving signal power and interference power according to the transmitter model, the receiver model and the interference model, and calculating a signal-to-noise ratio according to the link loss, the receiving signal power and the interference power; and determining a bit error rate according to the signal-to-noise ratio and the state of the flight ad hoc network, so as to evaluate the flight ad hoc network according to the signal-to-noise ratio and the bit error rate. The method can be used for analyzing the influence of the navigation deviation on the link performance and helping to optimize a flight ad hoc network protocol.

The present subject matter provides an RFID device configured to provide improved antenna gain and directivity. The RFID device includes an antenna, a metamaterial (MTM) array, and a substrate. The substrate includes a first surface and a second surface, and the antenna includes a bottom surface and a top surface. The bottom surface of the antenna and the MTM array are formed on the first surface of the substrate. The antenna and the MTM array are separated by a gap. The antenna is formed from a first conductive material defining an area surrounded by a first perimeter. The antenna includes a nesting slot. The MTM array is formed from a second conductive material defining an area surrounded by a second perimeter.

The utility model provides an anti-unmanned aerial vehicle antenna structure, which comprises an antenna housing, a reflecting plate, a plurality of radio frequency cable joints arranged in the antenna housing, a feed network, an antenna half-wave oscillator, a power divider, a coupler, a directional coupler, a directional antenna system, a control system and a power supply unit, wherein a plurality of radio frequency cable probes are connected with the antenna half-wave oscillator; comprising a 868MHz / 915MHz radio frequency cable joint, a 1.5 GHz radio frequency cable joint, a + 2.4 GHz radio frequency cable joint, a-2.4 Ghz radio frequency cable joint, a 5.8 GHz radio frequency cable joint and a 533MHz-6000 MHz radio frequency cable joint. The antenna half-wave oscillator comprises a T-shaped antenna, a symmetrical antenna, a ceramic antenna and an aluminum plate antenna; the power divider is connected with the symmetrical antenna; the coupler is connected with the T-shaped antenna; the directional coupler is connected with the ceramic antenna; the directional antenna system is connected with the control system. The antenna provided by the utility model is smaller in structure, improves the interference precision, reduces the energy consumption, enhances the anti-interference capability, and is higher in antenna gain.

The invention discloses a low-power-consumption adaptive antenna gain control device for a navigation system, and belongs to the technical field of navigation communication. Comprising an adjustable LNA array, a signal quality monitoring module and an MCU control unit. The adjustable LNA array is used for receiving a satellite signal and dynamically adjusting gain according to a control signal output by the MCU control unit; the signal quality monitoring module integrates a power detector and a signal-to-noise ratio analyzer, and is used for collecting the power, the signal-to-noise ratio and the multipath interference intensity of an input signal in real time, and generating a state vector S based on the collected parameters; and the MCU control unit is used for executing an adaptive gain control algorithm, calculating an optimal gain value based on the state vector S, and dynamically adjusting the gain configuration of the LNA array. Through the low-power-consumption LNA array and a self-adaptive gain control algorithm, high-precision signal receiving of the Beidou / GNSS terminal in a complex environment is realized, power consumption is remarkably reduced, and positioning reliability is improved.

Multi-band antenna arrays and methods of use are provided herein. An example device includes vertical surfaces arranged into a tubular configuration, where each of the vertical surfaces comprising antenna arrays is aligned along the vertical surfaces. The antenna elements are arrayed through a feed network in such a way that antenna gain is increased while elevation beam-width is reduced. The device also includes two or more radios connected to the antenna arrays on the vertical surfaces via the feed network.