377 results about "Antenna gain" patented technology

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 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 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 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.

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.

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.

The invention relates to the technical field of wireless communication, and discloses a liquid crystal antenna and communication equipment, and the liquid crystal antenna comprises a liquid crystal box and a metal waveguide; the liquid crystal box at least comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is located between the first substrate and the second substrate. The metal waveguide is located on the side, away from the second substrate, of the first substrate. The liquid crystal box further comprises a first metal layer which is located on the side, away from the metal waveguide, of the first substrate. The first metal layer is grounded, and the first metal layer comprises two hollow grooves; the length direction of the metal waveguide is the same as that of the hollow groove; in the direction perpendicular to the plane where the first substrate is located, the metal waveguide and the two hollowed-out grooves are at least partially overlapped. The communication equipment comprises the liquid crystal antenna. According to the invention, insertion loss can be effectively reduced, antenna bandwidth is improved, and antenna gain is ensured.

The invention discloses a low-loss broadband 1-bit transmission type intelligent metasurface and a dynamic beam regulation and control method, and belongs to the technical field of wireless communication. The intelligent metasurface is composed of transmission type metasurface units arranged periodically, each unit comprises a receiving patch layer, a feeder line layer and a transmitting patch layer, and 1-bit phase modulation is achieved by loading a PIN diode. The transmission coefficient of the unit in the frequency band of 6.00-7.23 GHz is greater than-3dB, the transmission loss at the frequency band of 6.6 GHz is as low as-0.58 dB, and the reflection coefficient is-20.74 dB. By adjusting the phase compensation of the metasurface unit, beam focusing and beam scanning within the range of 0-30 degrees can be realized, and the gain of the feed source antenna and the efficiency of a communication system are remarkably improved. The transmission-type intelligent metasurface solves the problems that an existing transmission-type intelligent metasurface is high in loss and narrow in bandwidth, and is suitable for intelligent wireless environment regulation and control in a sixth-generation mobile communication system.

The invention belongs to the technical field of terahertz communication physical layer security, and particularly relates to a terahertz physical layer key generation method based on leaky-wave antenna space-spectrum coupling characteristics. According to the invention, the sensitivity of the effective antenna gain of the leaky-wave antenna to the frequency and the spatial propagation direction is utilized to make up for the defect of low eavesdropping channel doubtful degree caused by lack of small-scale fading in terahertz communication, and the conditional generative adversarial network is designed to accurately speculate the equivalent channel power gain. A physical layer key is generated based on the estimated channel power gain. According to the method, the channel power gain can be accurately estimated from the received signal strength with noise and auxiliary information, the reciprocity of an equivalent channel is enhanced, and the method has a lower key mismatch rate and a higher key generation rate; under the condition of different signal-to-noise ratios, good key generation performance can be kept.

The utility model discloses an antenna structure and a mobile terminal, and relates to the antenna technology field, the antenna structure comprises a basic coupling body and a radiation body, the radiation body is in coupling connection with the basic coupling body and is vertical to the basic coupling body, the radiation body comprises at least two radiation branches, and the radiation branches are arranged in an inner and outer surrounding manner; according to the technical scheme of the utility model, the radiation body and the basic coupling body are vertically arranged, so that the antenna structure can be conveniently arranged in the mobile terminal, and the occupied space of the antenna structure can be reduced as much as possible; the internal and external surrounding arrangement of the radiation branches may help to form a more complex electromagnetic radiation mode, and improves the radiation efficiency and directivity of the antenna. The antenna structure can realize a larger radiation area in a limited space, the antenna gain and bandwidth are improved, and the working efficiency of the antenna structure is guaranteed.

The invention relates to a sea surface wind speed inversion method, system, equipment and medium in combination with advantages of a simulation model and satellite data, a simulated time delay Doppler (DDM) image is generated by inputting parameters such as positions and speeds of a satellite and a receiver, gain of a receiving antenna and the like, satellite actual measurement data is expanded in combination with the simulated image, an actual measurement-simulation combined data set is constructed, and a sea surface wind speed inversion result is obtained. Extracting a leading edge slope and a trailing edge slope, and calculating to obtain a leading edge-trailing edge composite characteristic value to invert a sea surface wind speed value; the system, the equipment and the medium are used for implementing the method. According to the invention, the simulation of the time delay Doppler diagram is carried out through the position and speed of the satellite and the receiver, the wind speed, the GNSS signal frequency and the receiving antenna gain parameter, and the data sample can be expanded under the condition that the actually measured data sample of a specific sea area or sea condition is scarce. The method has the advantages that the applicability is wide, and sea surface wind speed inversion can be accurately achieved under the condition that samples are scarce.

The invention relates to an antenna assembly and a vehicle. The antenna assembly comprises a dielectric body, a first antenna structure, a second antenna structure and a metal frame body. The projections of the plurality of second antenna structures on the dielectric body along the thickness direction of the dielectric body are arranged around the circumferential direction of the first antenna structure, the plurality of second antenna structures are rotationally symmetrical about the center of the first antenna structure, and each second antenna structure is coupled with the first antenna structure. The metal frame body is arranged around the periphery of the first antenna structure, and the metal frame body is connected with the dielectric body. The low-profile antenna structure is realized, the influence caused by the surface wave effect of the dielectric body is improved, the mutual coupling interference between double frequencies is reduced, and the antenna gain and the antenna bandwidth are improved. Besides, the metal frame body can restrain back lobe level energy, capacitance coupling is formed between the first antenna structure and the metal frame body, capacitance coupling is formed between the second antenna structure and the metal frame body, the antenna miniaturization design is further achieved, the overall size is reduced, and the installation space can be prevented from being limited.

The present disclosure relates to an antenna apparatus, and more particularly, to an antenna apparatus including a plurality of low-band elements that radiate an operating frequency in a first frequency band, and a plurality of mid-band elements that radiate an operating frequency higher than the operating frequency in the first frequency band. Among the plurality of mid-band elements, mid-band elements that interfere in a radiation direction in relation to the low-band elements are disposed to penetrate centers of the low-band elements, thereby providing an advantage of securing favorable antenna gain.

The invention provides an ultra-wideband four-arm dipole antenna for an unmanned aerial vehicle-mounted ground penetrating radar. The ultra-wideband four-arm dipole antenna comprises an antenna upper arm which comprises a first upper arm antenna and a second upper arm antenna which are symmetrically arranged; and the antenna lower arm is conducted with the first upper arm antenna and the second upper arm antenna through a first conductive connecting piece and a second conductive connecting piece respectively to form an equivalent parallel structure. The pair of upper arms introduced by the four-arm dipole antenna provided by the invention is coupled with the resistance-capacitance loading dipole antenna serving as an original antenna, and the antenna can generate a new resonance point under the coupling action, so that the bandwidth of the antenna is effectively expanded. Meanwhile, the input impedance imaginary part of the original antenna is obviously improved and is close to 0 in most frequency bands, the radiation characteristic of the antenna is effectively improved, and the antenna gain is finally improved.

The invention discloses an antenna, a communication control method and an antenna manufacturing method. The antenna comprises an antenna element, a metasurface and a reflecting surface, the metasurface comprises a plurality of units, and the units are connected through switches; the metasurface is connected with the reflecting surface through the antenna element; the metasurface and the reflecting surface form a resonant cavity, the on-off state of the switch is used for adjusting resonance parameters corresponding to the resonant cavity, the resonance parameters of the resonant cavity are used for adjusting the phase of a reflecting electric field, and the phase relation formed by the phase of the radiation electric field and the phase of the reflecting electric field is used for enhancing the antenna gain of the corresponding frequency band. The radiation electric field phase is an electric field phase corresponding to electromagnetic waves radiated by the antenna element, and the reflection electric field phase is an electric field phase corresponding to electromagnetic waves reflected by the reflection surface. According to the invention, the technical problem that the antenna gain is not adjustable in the prior art is solved.

The present invention discloses a gradient voltage-excited miniature ultra-wideband directional antenna comprising eight arrays and a logarithmic periodic silicon-based support structure. The arrays are directly bonded to the logarithmic periodic silicon-based support structure, forming periodically arranged array pairs. Each array is directly fed by a voltage source, and each array pair generates strong resonance, enhancing the frequency of the corresponding array and increasing the antenna gain. Eight arrays are bonded above the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern. Eight arrays are bonded below the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern, and the eight arrays are aligned above and below. The present invention utilizes gradient voltage excitation, breaking through the inherent relationship between antenna wavelength and antenna size. This achieves miniaturization while providing extremely wideband coverage from very low frequencies to millimeter waves and enhancing antenna gain.

The application relates to the technical field of V2X antennas, in particular to a V2X antenna structure which comprises a first radiation unit, a second radiation unit and a radiation slot unit; the first radiation unit comprises a first radiation branch, a second radiation branch and a feeding branch; the second radiation unit comprises a third radiation branch and a fourth radiation branch; the radiation slot unit is formed by the first radiation branch, the second radiation branch and the fourth radiation branch; and a radio frequency coaxial line comprises an outer conductor and an inner conductor. Compared with the prior art, the application has the advantages that the antenna has good performance on metal surfaces and non-metal surfaces, has the characteristics of small size and low profile, can be applied to metal surfaces, has high antenna gain, is simple to manufacture, has excellent performance, is convenient to install and use, and is easy to popularize.

The invention discloses an ultra-wideband differential Vivaldi antenna with a reflection-free notch characteristic and a continuous gain test method of the ultra-wideband differential Vivaldi antenna. The Vivaldi antenna is composed of a differential feeder line and a metasurface on the top layer, a metal ground layer on the bottom layer and an intermediate dielectric substrate layer. A gradual change flaring groove line is etched on the metal ground layer of the bottom layer, and the gradual change flaring groove line is composed of a gradual change groove line with an exponential distribution characteristic and a tail end circular open-circuit groove line. Differential mode signals can excite a traveling wave slot mode through a broadband conversion structure formed by the differential feeder lines and the gradually-changed flaring slot lines, then resonance of the whole metasurface can be excited, and non-reflection notch absorption of electromagnetic waves of a target frequency band is achieved through inherent conductor and dielectric loss during resonance of the metasurface. The continuous gain test method overcomes the defect that a broadband balun needs to be additionally designed in a traditional differential antenna gain test, and has the advantages of being simple in test process, accurate in result and the like.

The invention provides a curved surface polarization torsion reflecting surface and an antenna using the same, and belongs to the technical field of antennas. The curved surface polarization torsion reflection surface comprises a curved surface dielectric plate, and a metal bottom plate and an electromagnetic metasurface which are respectively arranged on the outer side and the inner side of the curved surface dielectric plate; the electromagnetic metasurface is formed by periodically arranging a plurality of single-layer electromagnetic metasurface units. The single-layer metasurface unit with the polarization torsion function is conformal on the curved surface, so that the technical problems that a traditional multi-layer planar polarization torsion structure is complex to process, curved surface conformal is difficult, and the performance is deteriorated after conformal are solved. The reflecting surface is preferably a paraboloid, so that the incident wave polarization torsion is realized, and the spherical wave can be converted into the plane wave to improve the antenna gain. The metasurface unit keeps good cross polarization reflection performance within the wide incidence angle range of 0-40 degrees, is suitable for curved surface conformal design, can be integrally formed through 3D printing, and is easy and convenient to machine and stable in performance.

The present invention relates to the technical field of wireless communications, and specifically discloses an adaptive transmission method and user equipment for a CDD mode in a V2X communication technology, where the user equipment comprises an antenna module at least comprising a first antenna and a second antenna. The method comprises the following steps: user equipment acquires SNR values of two antennas, responds to the difference of the SNR values of the antennas, adaptively adjusts the transmitting power of the antennas according to a preset transmitting power allocation table, and realizes the comprehensive advantage characteristics of CDD and TxD modes even if only hardware supporting the CDD mode exists, thereby achieving the purpose of increasing the antenna gain in a specific scene.