279 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 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.

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.

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 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 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 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 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.

The application discloses a high-gain millimeter wave polarization reconfigurable antenna and belongs to the technical field of wireless communication.The application provides a high-gain millimeter wave polarization reconfigurable antenna, and the whole antenna structure is completed on two layers of dielectric substrates.Polarization diversity is realized by connecting the center patch of two groups of parasitic short columns by using pin diode switches, and the polarization state can be switched in the directions of ±45 degrees.Then, in order to improve the radiation performance of the antenna, an extended semi-ellipsoid lens is added to the antenna, so that the antenna gain is increased by about 10 dB, and therefore, the integrated lens antenna is an effective method for developing the millimeter wave polarization reconfigurable antenna.The gain-enhanced polarization reconfigurable antenna has the advantages of high gain, low cost and stable radiation pattern and is an ideal choice for low-cost millimeter wave applications of the fifth generation (5G) communication technology.

The application provides a kind of satellite-borne GNSS phased array antenna gain stability on-orbit monitoring method, system, the method comprises: obtaining the real-time position information of detection equipment and the beacon position information of beacon source;According to real-time position information and beacon position information, it is judged whether beacon source enters the gain monitoring range of detection equipment;If yes, then the beacon signal sent by the beacon source is tracked by GNSS phased array antenna, and the tracking result is obtained, and GNSS phased array antenna is installed on detection equipment;Based on tracking result, real-time monitoring is carried out on GNSS phased array antenna.The problem that GNSS phased array antenna cannot be monitored in subsequent orbit after being installed on detection equipment and put into operation in the prior art is solved, and because the entire antenna gain monitoring process is carried out in the actual application environment, the gap between the ground darkroom environment and the actual application environment can be reduced, and the influence of the performance change of the receiving antenna on the measurement result is reduced, to ensure the reliability and accuracy of the measurement result.

This invention discloses an electric dipole Yagi antenna, comprising a dielectric substrate and a magnetically coupled metal structure. The top surface of the dielectric substrate is provided with an electric dipole driver, a reflector, and multiple parasitic antenna elements. The reflector is located on one side of the electric dipole driver, the magnetically coupled metal structure is located on the other side of the electric dipole driver, and the parasitic antenna elements are located on the side of the magnetically coupled metal structure away from the electric dipole driver. The electric dipole Yagi antenna has a novel structure, utilizing a magnetically coupled metal structure to replace the parasitic antenna elements closest to the electric dipole driver. This significantly improves the antenna gain without changing the original size of the electric dipole Yagi antenna, making it particularly suitable for applications with limited space.

This invention relates to a pattern-reconfigurable antenna based on artificial surface plasmon polaritons (SSPPs), belonging to the field of antenna technology. The antenna includes a coplanar waveguide feed line, a transition structure, a reconfigurable SSPP waveguide, and periodic radiating elements. The reconfigurable SSPP waveguide modifies the dispersion characteristics by adding a varactor diode to a traditional SSPP element and adjusting the capacitance value using a bias circuit. The periodic radiating elements are elliptical patches with rectangular slots, coupled to the reconfigurable SSPP waveguide to radiate electromagnetic waves. This invention solves the problems of single radiation direction in traditional antennas and low gain in existing reconfigurable antennas. It achieves fixed-frequency beam scanning (maximum 23°) and frequency beam scanning (maximum 90°) in the 11.5GHz-15GHz frequency band, with gains greater than 9dBi (maximum 11.1dBi), expanding the detection range and increasing the detection distance, making it suitable for fields such as UAV detection.

The application discloses a wireless data communication terminal device of a power system and a Web terminal operation method, and relates to the technical field of terminal devices. The wireless data communication terminal device of the power system comprises a terminal machine, a support leg and an antenna assembly. The bottom of the terminal machine is provided with a frame body capable of fixing the terminal machine to a plane position. The support leg is arranged at the bottom of the terminal machine and forms support for the bottom of the terminal machine. The antenna assembly is installed at the top of the terminal machine and comprises two states of unfolding and shrinking. A heat dissipation module is arranged in the terminal machine. The opening and closing of the air inlet of the heat dissipation module are controlled by the unfolding and shrinking states of the antenna assembly. A wireless communication module is arranged in the terminal machine and connected to the terminal machine. The application adjusts the angle position of the antenna arranged in the communication terminal device, can realize antenna gain in a corresponding range, and can obtain more stable data transmission effect in the process of main data interaction.

Methods, media, and systems are provided for optimizing coverage and power usage in a network deploying an unlicensed band. A first transmission power associated with a primary carrier and a second transmission power associated with a secondary carrier are determined. Location data and channel state information from a user device utilizing the primary carrier and the secondary carrier are received. An interference level may be determined using the channel state information. Based on the location data and the interference level, the second transmission power associated with the secondary carrier is reduced and the first transmission power of the primary carrier is increased. In some aspects, a beamforming technique is applied for downlink transmissions via a 5G New Radio unlicensed band. In some aspects, upon detection of an increase of 3 dBi antenna gain, the second transmission power is reduced by 1 dBm.

The invention discloses an ultra-wideband small radio frequency antenna for PE pipe detection, and relates to the technical field of antennas. The antenna comprises an insulating medium substrate and a radiation structure arranged on the front surface of the insulating medium substrate. The radiation structure comprises a main radiation patch formed by an index gradual change slot line, an annular patch arranged at an interval with the tail end of the main radiation patch, and a strip-shaped patch arranged at an interval with the annular patch. The resistor element comprises a first resistor, a second resistor and a third resistor, and the main radiation patch is connected with the annular patch through the first resistor; a radiation part of the antenna forms a specific resistance loading network through a radiation structure and a resistance element, and a slot line feed structure feeds energy, so that resonance with lower frequency can be effectively excited, and the low-frequency cut-off frequency of the antenna is reduced, which is crucial for detecting a deep target; therefore, the input impedance of the antenna is very stable in the whole ultra-wideband, the energy transmission efficiency is ensured, and the gain and efficiency of the antenna are gradually increased.

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.

A high-gain millimeter wave antenna structure and a millimeter wave antenna module. The high-gain millimeter wave antenna structure includes a first reflective plate, a second reflective plate and a millimeter wave antenna module disposed between the first and the second reflective plates. When the millimeter wave antenna module is configured to provide an original millimeter wave signal, the original millimeter wave signal provided by the millimeter wave antenna module is reflected by the first and the second reflective plates in sequence to form an operating millimeter wave signal transmitted in a same predetermined direction. Therefore, an operating antenna gain of the operating millimeter wave signal provided by the cooperation of the millimeter wave antenna module, the first reflective plate and the second reflective plate is greater than an original antenna gain of the original millimeter wave signal provided by the millimeter wave antenna module.

The present invention provides an antenna device that includes multiple antennas in a common housing, can suppress the decrease in antenna gain and achieve miniaturization. The antenna device (1) includes a TEL antenna (2) and a capacitive load element (3) in a common housing. The capacitive load element (3) is located above the TEL antenna (2). The length of the capacitive load element (3) is a natural multiple of 1 / 2 of the wavelength of the PCS band. The TEL antenna (2) is arranged to avoid the maximum voltage point of the standing wave of the PCS band generated by the capacitive load element (3).

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 application discloses a kind of ultra-wideband small radio frequency antennas for PE pipe detection, it is related to antenna technical field;The application includes insulating dielectric substrate and the radiation structure of setting in insulating dielectric substrate front, the radiation structure includes the main radiation patch of being formed by exponential gradually changing slot line, ring patch is arranged at the end of main radiation patch interval, and strip patch is arranged at interval with ring patch;Resistance element includes first resistance, second resistance and third resistance, and main radiation patch is connected with ring patch by first resistance;The radiation part of the antenna of the application forms specific resistance loading network by radiation structure and resistance element, slot line feed structure feeds energy, and can effectively stimulate lower frequency resonance, reduce the low frequency cutoff frequency of antenna, which is crucial for detecting deep targets, so that the input impedance of the antenna is very stable throughout the ultra-wide frequency band, ensuring energy transmission efficiency, antenna gain and efficiency are gradually increased.

This invention provides a communication method, apparatus, program product, and storage medium, relating to the field of communication technology, to address the shortcomings of high system overhead in existing technologies. The method includes: receiving information from at least one serving terminal, the information of which includes the location information and receiving antenna gain of the serving terminal; receiving first information, the first information including information from at least one interfering terminal of a neighboring satellite, the information of which includes the location information and receiving antenna gain of the interfering terminal; generating precoding vectors corresponding to each serving terminal based on the satellite information, the information of the at least one serving terminal, and the first information; and transmitting signals to the corresponding serving terminals based on the precoding vectors.

The invention belongs to the technical field of low-altitude radar antenna gain, and discloses a low-altitude surveillance radar X-band antenna gain estimation method and system, and the method comprises the steps: collecting the phase distribution of a radiation unit, the standing-wave ratio of a feed network and other microscopic parameters, and building a correlation model of the microscopic parameters with a mesoscopic multipath signal and macroscopic scene complexity; a transition area correction factor iterator is introduced, temperature compensation, frequency compensation and a multi-level loss correction process are combined, and errors of temperature drift and frequency deviation of the 10-12 GHz frequency band are counteracted; the accuracy of gain estimation in a complex low-altitude environment is improved; constructing a three-dimensional adaptive matrix of the RCS, the maneuvering acceleration and the target type, and forming a three-dimensional correction system in combination with the environment complexity dimension; in a multi-target scene, computing resources are distributed according to the logic that the smaller the RCS is, the larger the maneuvering acceleration is and the higher the priority is, the targets are processed in batches by adopting a time division multiplexing architecture, and the contradiction between the gain response lag of the X-band antenna and the fast maneuvering of the targets is relieved.

Disclosed is a method and system for interference control and hybrid beamforming using multi-agent deep reinforcement learning for multiple users. The disclosed method includes performing multi-agent reinforcement learning using interference and antenna gain information that is expected based on a gain table designed using channel state information (CSI) of all user equipments; searching for an analog beamforming matrix pair corresponding to a link that maximizes antenna gain and minimizes interference between user equipments through multi-agent reinforcement learning; applying a signal-to-leakage plus noise ratio (SLNR) maximization technique that minimizes the interference between the user equipments based on the link; and optimizing transmission (Tx) power for each link based on iterative water-filling.