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107 results about "Antenna surface" patented technology

Method and system for automatically detecting structural defects of electrically tunable antenna

The invention relates to the technical field of defect detection, and discloses an electrically tunable antenna structure defect automatic detection method and system, and the method comprises the steps: collecting the multi-modal data of an electrically tunable antenna, and generating a three-dimensional model; mapping the three-dimensional model to a two-dimensional space, displacing pixels by analyzing the curvature distribution condition of the surface of the electrically tunable antenna, and filling a missing region in the two-dimensional space to obtain a two-dimensional model; identifying to obtain a first defect identification result; extracting a defect endpoint set from the first defect identification result, constructing a defect graph, and mapping the defect graph into the three-dimensional model to obtain a second defect identification result of the electrically tunable antenna; the method is suitable for geometric structures of a paraboloid and a cylindrical surface in the electrically-tunable antenna, image distortion and information loss caused by a curved surface structure of the electrically-tunable antenna are reduced, the quality of the constructed model is improved, the problems of local overheating, connecting piece loosening and the like caused by electrical faults in the electrically-tunable antenna can be found in time in combination with thermal image data, and the reliability of the electrically-tunable antenna is improved. And the accuracy of a defect identification result is improved.
Owner:NANJING ABY RF TECH CO LTD +1

Double-plane tapered slot antenna

The invention discloses a biplane tapered slot antenna, and belongs to the technical field of antennas. The antenna comprises a dielectric substrate, a metal radiation patch, a metal conduction band and a resistor. The radiation patch is arranged in a double-plane manner, so that the different-plane tapered slot line is constructed, and the impedance matching of the antenna is improved while the power capacity is improved. The metal radiation patch comprises an upper radiation patch and a lower radiation patch, the metal conduction band and the lower radiation patch form a microstrip line, and the resistor, the upper radiation patch and the lower radiation patch are connected in series into a whole, so that the effective suppression of the reflection voltage of the antenna is realized; therefore, resistance loading does not affect the radiation efficiency of the antenna. Technical index parameters such as power capacity, reflection voltage and radiation efficiency are considered at the same time, a technical scheme with excellent comprehensive performance is provided for ultra-wideband microwave pulse radiation, and the ultra-wideband microwave pulse radiation model can be used as an antenna basic model.
Owner:ZHEJIANG UNIV

Antenna snow melting device, antenna system, and program

To provide an antenna snow melting device that can simplify the calculation of the power required to melt snow.SOLUTION: An antenna snow melting device 400 attached to an antenna reflector 500 includes an imaging unit 401 that images the antenna reflector 500, a measuring unit 402 that acquires imaging data of the antenna reflector 500 from the imaging unit 401 and measures the snow accretion rate, which indicates the rate of snow accretion per unit area of the antenna surface of the antenna reflector 500, on the basis of the acquired imaging data, and a control unit 403 that controls a heating unit 501 installed on the antenna reflector 500 on the basis of the snow accretion rate of the antenna surface of the antenna reflector 500.SELECTED DRAWING: Figure 13
Owner:NEC PLATFROMS LTD

Profiling supporting seat for antenna test

The utility model relates to the technical field of antenna testing, in particular to a profiling supporting seat for antenna testing, which comprises a base, an accommodating groove is arranged on a supporting surface of the base, a plurality of sliding plates are vertically and slidably arranged in the accommodating groove, and the sliding plates are uniformly arranged in the accommodating groove. An air bag assembly is arranged between the sliding plate and the base. The air bag assembly comprises a main air bag and an auxiliary air bag, and air spaces of the main air bag and the auxiliary air bag are communicated together. The main air bag is located between the bottom end of the sliding plate and the containing groove. Gap spaces exist between the adjacent sliding plates, an auxiliary air bag is correspondingly arranged in each gap space, and the top ends of the auxiliary air bags are attached to the side walls of the top ends of the sliding plates. According to the utility model, the technical problem of self-adaptive profiling supporting of the profiling supporting seat on the surfaces of antennas of different models is solved.
Owner:CHENGDU TIMES TOP TECHNOLOGY CO LTD

Control unit for receiving and processing radio signals in a vehicle

The invention relates to a control unit (100) for receiving and processing radio signals in a vehicle (1300). The control unit (100) comprises a housing (103), a main circuit board (205) arranged in the housing (103) and having at least one contact surface (218), and an antenna (107). The antenna (107) has an antenna surface (119) arranged on a top surface (108) of the housing (103) and a connection contact (221) with at least one spring-elastic contact finger (223) that contacts a contact surface (218) of the main circuit board (205). The antenna surface (119) and the connection contact (221) are formed in one piece from a metal sheet.
Owner:JOYNEXT GMBH

Measuring device for surface precision of reflector antenna

The invention belongs to the field of antenna processing, and particularly relates to a reflector antenna surface precision measuring device which comprises a workbench and a laser scanning head. A first electric push rod is fixedly connected to the side face of the workbench, a top cover is fixedly connected to the output end of the first electric push rod, a bottom bin is fixedly connected to the position, corresponding to the top cover, of the bottom of the workbench, a negative pressure pipe is fixedly connected to the center of the bottom of the bottom bin, and a plurality of extraction openings are formed in the top end of the negative pressure pipe. A first electric push rod is controlled to drive a top cover to move downwards, the top cover covers the top of a bottom bin to form a relatively sealed space, then a draught fan is started, the air inlet end of the draught fan is connected with an air filter, and the draught fan sucks dust from the bottom of the antenna through a negative pressure pipe so as to suck the dust in the antenna, so that the antenna can be conveniently cleaned; therefore, errors caused by metal chippings and dust generated by processing adhered to the surface can be avoided, and a laser scanning head can conveniently acquire data of the reflecting surface of the antenna.
Owner:XIAN DONGTANG HUATONG INFORMATION TECHNOLOGY CO LTD

Large-scale net antenna surface shape measurement and regulation method and device based on force-position fusion visual measurement

The application relates to a large-scale rope net antenna surface shape measurement and regulation method based on force-position fusion vision measurement, and relates to the field of antenna precision control and optimization. In order to solve the problems of high cost, high structural complexity and limited regulation precision of the existing technology, the application provides a high-efficiency regulation method. The method comprises the following steps: collecting displacement data of upper and lower rope net nodes and tensile spring marker points, and recording images; pre-processing the image data, and extracting actual coordinates of the marker points; comparing the actual coordinates with design coordinates, calculating node displacement errors, and obtaining root mean square error values of an antenna reflecting surface through a shape error formula; based on the root mean square error values, calculating deformation amounts of piezoelectric actuators and spring deformation variables, determining driving voltages and tensile force parameters; generating control instructions and optimizing regulation according to the calculation results. The method is suitable for design and maintenance of a spacecraft antenna, and has the advantages of high precision, low cost and easy operation.
Owner:HARBIN INST OF TECH

Radar sensor with reflection inhibitors

The invention relates to a radar sensor (10) comprising a waveguide antenna (12) for transmitting and / or receiving radar waves (14) with respect to a sensor environment (16), with an antenna surface (20) facing the sensor environment (16) and comprising at least in sections an electrically conductive surface material (22), and with at least one antenna element (24) which is designed as at least one opening (26) in the antenna surface (20) and which lies opposite a protective component (34) arranged in the sensor environment (16), wherein the antenna surface (20) has structured reflection inhibiting means (36) which are designed to inhibit the reflection of scattered waves (38) as radar waves (14) reflected by the protective component (34) between the protective component (34) and the antenna surface (20) at least by wave interference of the scattered waves (38).
Owner:ROBERT BOSCH GMBH

Electronic scanning antenna system and communication method

This invention provides an electronically scanning antenna system capable of communicating with communication equipment with high precision and continuous operation. [Solution] The electronic scanning antenna system (1) comprises a plurality of antenna surfaces (S), detection units (12, 131), a selection unit (132) that, based on the detection results of the detection units, selects one of the plurality of antenna surfaces as the main antenna surface and one of the other antenna surfaces as the sub-antenna surface, a receiving unit (134) that receives a received signal from a communication device via the main antenna surface and the sub-antenna surface, and a transmitting unit (135) that transmits a transmitted signal to a communication device via the main antenna surface. Each of the plurality of antenna surfaces is equipped with a plurality of units (U1 to U4) through which the received signal and the transmitted signal are transmitted. The detection unit detects the received signal value of the received signal transmitted to each of the plurality of units.
Owner:ASTRO TERRACE CO LTD

Novel slit flat plate scattering portable antenna system

The invention provides a novel slot flat plate scattering portable antenna system, which is applied to the technical field of antenna scattering communication. Comprising an antenna surface subsystem, a servo turntable subsystem and a foldable tripod unit, wherein the servo turntable subsystem and the foldable tripod unit are mounted on a back plate of the antenna surface subsystem, and the foldable tripod unit supports the servo turntable subsystem; the antenna surface subsystem transmits and receives electromagnetic wave signals; the servo turntable subsystem bears and drives the antenna surface subsystem to perform azimuth and pitching rotation, and comprises an azimuth assembly, a pitching assembly, an ultrasonic sensor and a servo control system; the ultrasonic sensor measures the real-time distance from the back plate; the servo control system determines a current pitch angle according to the real-time distance; and under the condition that the current azimuth angle and the current pitch angle of the antenna surface subsystem meet the preset condition of the alignment target, the azimuth assembly and the pitch assembly are controlled to stop running. The problems that an existing portable antenna is large in size, tedious in erection, low in attitude adjustment intelligent degree, too large in weight and insufficient in modular design are solved.
Owner:XIAN TONGFEI ELECTRONIC TECH CO LTD

Satellite-ground communication terminal of low-orbit satellite

The utility model discloses a satellite-ground communication terminal of a low-orbit satellite, relates to the field of satellite communication, and is used for solving the problems of high degree of freedom and shock resistance of the satellite-ground communication terminal. The terminal comprises a three-axis adjusting system, and the three-axis adjusting system is connected with the antenna surface so as to adjust the azimuth angle, the roll angle and the pitch angle of the antenna surface. The three-axis adjusting system is mounted on the antenna base; and a damping mechanism is arranged in the antenna base and is connected with the three-axis adjusting system. The designed terminal has three adjustment freedom degrees of azimuth angle, roll angle and pitch angle, and a damping mechanism is arranged under the three-axis adjustment system, so that vibration in the movement process can be effectively absorbed, and the operation stability of the terminal is improved.
Owner:四川领航未来通信技术有限公司

A gas-tight combination antenna for underground 4G and GPS

This utility model discloses a hermetically sealed combination antenna for 4G and GPS in wellbore applications, relating to the field of combined antenna technology. It includes a screw sleeve fixedly mounted on a housing, through which the GPS antenna and 4G antenna pass and are electrically connected to the housing. A rubber post, encasing the GPS and 4G antennas, is fixedly mounted inside the screw sleeve. This hermetically sealed combination antenna for 4G and GPS in wellbore utilizes the rubber post encasing the two antennas within the screw sleeve to seal and enclose the inner side of the screw sleeve, thereby improving the sealing line between the inner side of the screw sleeve and the antennas. This prevents external moisture from entering the inner side of the housing along the inner side of the screw sleeve and the antenna surface, improving the protection of the internal circuitry.
Owner:GAOKE ANT

A multi-frequency antenna and communication device

The application provides a multi-frequency antenna and a communication device. The multi-frequency antenna comprises a reflecting plate, a first radiating unit and a second radiating unit, the first radiating unit and the second radiating unit are arranged on one side of the reflecting plate, and the first radiating unit is located between the reflecting plate and the second radiating unit. The first radiating unit comprises a first radiating part and a metal plate, and the metal plate is located between the first radiating part and the second radiating unit. The second radiating unit comprises a second radiating part and a metal ring, and the metal ring is located between the second radiating part and the metal plate. When the above structure is adopted, the size of the multi-frequency antenna as a whole can be reduced, and the first frequency band and the second frequency band have high isolation, so that the two frequency bands can work independently, the multi-frequency antenna can meet the miniaturization demand of the common antenna surface, the antenna works stably, and the efficiency is high.
Owner:HUAWEI TECH CO LTD

Asymmetric coupling type double-cage short-wave antenna device

The utility model discloses an asymmetric coupling type double-cage short-wave antenna device, and belongs to the technical field of radio short-wave communication. The antenna device comprises a self-supporting tower assembly, a coupling lower cage antenna surface assembly, a direct-feed lower cage antenna surface assembly, a distribution box assembly, a feed end insulator assembly, a direct-feed upper cage antenna surface assembly and a main lightning rod assembly. The asymmetric coupling type double-cage short-wave antenna device provided by the utility model has the characteristics of wider working bandwidth and low elevation radiation, and the antenna surface and the self-supporting tower assembly are designed in an integrated conformal manner, so that the influence of performance index reduction caused by the fact that the self-supporting tower assembly passes through the antenna surface is eliminated; the device not only can cover an ultra-wideband short-wave communication frequency band of nearly four times of frequency, but also can realize excellent performance of low return loss, high gain, low radiation elevation angle and omnidirectional radiation.
Owner:SHAANXI HAITONG ANTENNA

Irregular subarray division design method for array antenna beam forming

The invention discloses an irregular sub-array division design method for array antenna beamforming, which comprises the following steps: constructing an association mathematical model of an irregular sub-array division array plane based on a preset sub-array set and an array antenna array plane, the sub-array set comprising a plurality of irregular candidate sub-arrays, the association mathematical model is used for representing an affiliation relationship between the plurality of irregular candidate sub-arrays and all array elements in the antenna array plane; based on reference full-filling array excitation and a preset excitation matching criterion, excitation of each irregular candidate subarray is determined, and the reference full-filling array excitation is excitation required by target beam forming; based on the association mathematical model and excitation of each irregular candidate subarray, a convex optimization model is constructed, and the convex optimization model takes a main lobe forming wave number matching error and a peak side lobe level as a joint optimization target; and solving the convex optimization model to obtain an optimal irregular subarray division scheme and excitation of each subarray. According to the invention, good radiation characteristics of the antenna can be maintained while the cost of the antenna system is reduced.
Owner:XIDIAN UNIV

Anti-interference data receiver based on dam displacement monitoring data transmission

The utility model discloses an anti-interference data receiver based on dam displacement monitoring data transmission, which comprises a receiver structure, a control box is arranged on the front side of the receiver structure, an antenna assembly is arranged at the top of the control box, a track frame is bolted at the top of the control box, a fixed block is arranged at the top of the track frame, and a data transmission module is arranged at the top of the fixed block. The left side of the fixing block is in bolted connection with a protection assembly, and a sliding block is inserted into the inner wall of the protection assembly, so that the problems that when an existing anti-interference data receiver based on dam displacement monitoring data transmission is used, an antenna is prone to being damaged, a feeder line of the antenna is prone to being aged and damaged, and consequently signal transmission loss is increased, and the data transmission efficiency is improved are solved. Even signal transmission is interrupted, or the polarization mode of the antenna may be changed due to factors such as external force impact, the signal receiving effect is affected, and dust accumulated on the surface of the antenna can attenuate satellite signals, resulting in weakening of the strength of the signals reaching a receiver.
Owner:海南碧兴仪器科技有限公司

Patch antenna, wireless device and polarization fingerprint authentication method and system of wireless device

The invention relates to a patch antenna, wireless equipment and a polarization fingerprint authentication method and system of the wireless equipment. In the first aspect, the patch antenna is provided, the patch antenna is provided with injection grooves, the injection grooves are formed according to a set grooving scheme, the grooving schemes of different patch antennas are different, and the grooving schemes comprise the number of the injection grooves, the area where the injection grooves are located, the distance between the injection grooves and the center of the antenna and the length of the injection grooves. The second aspect provides a wireless device having the above patch antenna. The third aspect provides a polarization fingerprint authentication method for wireless equipment. The method comprises the following steps: sending a wireless signal through the wireless equipment; receiving the wireless signal and extracting a polarized fingerprint; matching the polarized fingerprint with a polarized fingerprint stored in a polarized fingerprint database; and authenticating the wireless equipment according to a matching result. By slotting the surface of the antenna and injecting the polarized fingerprint, the problem of insufficient fingerprint difference caused by hardware defects in the existing radio frequency fingerprint technology is solved.
Owner:INSTITUTE OF INFORMATION ENGINEERING CHINESE ACADEMY OF SCIENCES

Novel slit plate scatter portable antenna system

The application provides a novel gap flat plate scattering portable antenna system, which is applied to the technical field of antenna scattering communication. The system comprises an antenna surface subsystem, a servo turntable subsystem installed on a backboard of the antenna surface subsystem and a foldable tripod unit, the foldable tripod unit supports the servo turntable subsystem; the antenna surface subsystem transmits and receives electromagnetic wave signals; the servo turntable subsystem carries and drives the antenna surface subsystem to rotate in azimuth and elevation, and comprises an azimuth component, an elevation component, an ultrasonic sensor and a servo control system; the ultrasonic sensor measures the real-time distance from the backboard; the servo control system determines the current elevation angle according to the real-time distance; in the case that the current azimuth angle and the current elevation angle of the antenna surface subsystem meet the preset conditions for aligning the target, the azimuth component and the elevation component are controlled to stop running. The problems of the prior art, such as large volume, complicated erection, low intelligent degree of attitude adjustment, excessive weight and insufficient modular design, are solved.
Owner:XIAN TONGFEI ELECTRONIC TECH CO LTD

Ultra-wideband notch antenna for 5G millimeter wave communication systems

The present invention discloses an ultra-wideband notch antenna for a 5G millimeter wave communication system, comprising a first metal layer, a second metal layer and a third metal layer; the second metal layer is a metal ground, the third metal layer is a feeding part, and the first metal layer is a radiating part, comprising a radiating patch and a parasitic patch; the radiating patch is a dipole structure, comprising two dipole arms, and the end of each dipole arm is bent inward on the side away from the symmetry axis; the parasitic patch comprises a first parasitic patch and a second parasitic patch, the first parasitic patch is located outside the end of each dipole arm, and is used to excite a current in the same direction as the dipole arm within the working frequency band to improve the impedance matching of the antenna; the second parasitic patch is located between the ends of each dipole arm, and is equivalent to a half-wavelength resonator at the center frequency of the required filtering band. When the antenna operates within this frequency band, the surface current of the antenna will be concentrated on the parasitic patch, thereby causing impedance mismatch and achieving effective filtering of this frequency band.
Owner:XIDIAN UNIV

A portable tracking device for low earth orbit satellite antennas

A portable tracking device of a low-orbit satellite antenna comprises a shell assembly and a driving mechanism arranged in the shell assembly, the top of the shell assembly is provided with an antenna surface, the driving mechanism is connected to the antenna surface for controlling the adjustment of the antenna surface in the pitch and roll directions, the bottom of the antenna surface is provided with a connecting structure, the connecting structure is provided with a first movable connecting point movably connected with the top end of the shell assembly, the connecting structure is further provided with a second movable connecting point and a third movable connecting point, and the first movable connecting point, the second movable connecting point and the third movable connecting point form a triangular structure in space; compared with the prior art, the support of the antenna surface is realized through the three-point connection, the occupied space of the antenna surface is reduced, thereby the transportation and carrying of the tracking device are facilitated, and the convenience of the tracking device is improved.
Owner:DITAI (ZHEJIANG) COMM TECH CO LTD

Waveguide antenna with polarization means and radar sensor

The invention relates to a waveguide antenna (10) for a radar sensor (46), comprising a waveguide substrate (12) having cavity structures (14) for transmitting radar waves within the waveguide antenna (10), an antenna surface (18) facing surroundings (16) of the waveguide antenna (10), at least one emission element (20) for emitting radar waves into the surroundings (16) of the waveguide antenna (10), said radar waves being polarized in a first direction (22) perpendicular to a normal direction (24) of the antenna surface (18), wherein at least regions of the antenna surface (18) comprise polarization means (34) for rotating the polarization of radar waves that were reflected in the surroundings (16) and are incident on the polarization means (34). The invention also relates to a radar sensor (46).
Owner:ROBERT BOSCH GMBH

An ultra-wideband dual-polarized transmission array antenna based on interdigital capacitive coupling

The application relates to an ultra-wideband dual-polarized transmission array antenna based on interdigital capacitive coupling, which comprises a transmission array and a feed antenna; the transmission array is a horizontal array structure composed of transmission units in quasi-periodic distribution; the transmission unit comprises a receiving unit, a transmitting unit and a parallel flat plate transmission line; the receiving unit and the transmitting unit are structures composed of a planar short dipole through interdigital capacitive coupling, a dielectric substrate and a metal ground which are orthogonally arranged; the parallel flat plate transmission line is a structure composed of two mutually parallel planar metal wires and a dielectric substrate in the middle; and the phase center of the center frequency of the feed antenna is located at the focal point of the transmission array. Compared with the prior art, the ultra-wideband dual-polarized transmission array antenna surface based on interdigital capacitive coupling has a relatively low relative profile, a wide operating frequency band, high reliability, can withstand a certain degree of high power, and can be applied to a relatively complex working environment.
Owner:SHANGHAI JIAOTONG UNIV

Portable tracking device of low-orbit satellite antenna

A portable tracking device of a low-orbit satellite antenna comprises a shell assembly and a driving mechanism arranged in the shell assembly, an antenna face is arranged at the top of the shell assembly, the driving mechanism is connected to the antenna face and used for controlling adjustment of the antenna face in the pitching direction and the rolling direction, and a connecting structure is arranged at the bottom of the antenna face. The connecting structure is provided with a first movable connecting point movably connected with the top end of the shell assembly, the connecting structure is further provided with a second movable connecting point and a third movable connecting point, and the first movable connecting point, the second movable connecting point and the third movable connecting point form a triangular structure in space. Compared with the prior art, the antenna surface is supported through three-point connection, and the occupied space of the antenna surface is reduced, so that the tracking device is convenient to transport and carry, and the convenience of the tracking device is improved.
Owner:DITAI (ZHEJIANG) COMM TECH CO LTD

Automatic anti-condensation purge system and method for ultrasonic or radar level gauge

PendingCN122500007AImprove cleaning efficiencyEfficient Directional CleaningTemperature controlSolenoid valve
This invention discloses an automatic anti-condensation purging system and method for ultrasonic / radar level gauges. The system includes an anti-vapor protection device and an automatic purging control air supply unit. The protection device is a double-sleeve structure fitted over the probe, forming an annular air duct, with a directional injection hole at its lower end. The control unit includes a solenoid valve and a pressure reducing valve controlled by a time relay. The method involves setting the purging cycle and duration, and the time relay periodically triggering the solenoid valve to open, allowing dry compressed air to be ejected at high speed through the injection hole in the annular air duct, directionally purging the antenna surface. After purging, the valve is closed, and the process is repeated. Preferably, an electric heating and temperature control system is installed inside the annular air duct. This invention achieves timed, directional, uniform, and low-energy purging of the level gauge antenna surface, effectively preventing water vapor condensation and dust adhesion, and significantly improving the measurement accuracy and operational reliability of the instrument in harsh environments.
Owner:SHANXI TAIGANG STAINLESS STEEL CO LTD

Terahertz device

A terahertz device includes a substrate, a terahertz element, an antenna base, and a reflecting film. The terahertz element is mounted on the substrate to generate electromagnetic waves. The antenna base is disposed at a position opposite to the substrate and has an antenna surface. The reflecting film is formed on the antenna surface to reflect at least a portion of the electromagnetic waves generated from the terahertz element in one direction.
Owner:ROHM CO LTD

Flexible foldable structure antenna surface

The utility model discloses a flexible foldable structure antenna surface, which relates to the technical field of antenna surface materials and comprises an antenna surface main body, the antenna surface main body sequentially comprises a first TPU (thermoplastic polyurethane) layer, a conductive layer and a second TPU layer from inside to outside, and the conductive layer is carbon fiber woven cloth. According to the utility model, the antenna surface with the flexible foldable structure is arranged, so that the antenna surface is endowed with overall flexibility and can be smoothly unfolded and folded, the folding times are more than 100 times, and no crease is generated; wherein the first TPU layer and the second TPU layer are thermoplastic elastomers, and the first TPU layer is softer than the second TPU layer, so that better toughness is provided for the inner surface, and smooth unfolding and folding of the antenna surface are facilitated; the structure is reasonable and scientific, the manufacturing is simple, the sheet resistance of the conducting layer is 0.80 omega mm < 2 > / m, and the electromagnetic wave gain reflection requirement of the X-band antenna surface can be met.
Owner:SHAANXI TIANYI ANTENNA

Rib contour optimization method of annular truss type radial rib antenna and related equipment

The invention belongs to the technical field of aerospace communication antenna structure optimization, and discloses an annular truss type radial rib antenna rib contour optimization method and related equipment, and the method comprises the steps: building an annular truss type radial rib antenna model; initializing parameters of the annular truss type radial rib antenna model; inputting the initialized parameters of the annular truss type radial rib antenna model into a set rib contour optimization algorithm, and outputting an optimization result meeting a set threshold value; wherein the rib profile optimization algorithm is based on a He-horse optimization algorithm, optimization is carried out by taking minimization of a root-mean-square error between the antenna surface of the annular truss type radial rib antenna model and an ideal paraboloid as an optimization target, the profile precision of the antenna can be accurately improved, the performance of the antenna is guaranteed, and an optimization result meeting a set threshold value is finally output. A reliable basis can be provided for antenna rib contour design, and optimization effectiveness and practicability are ensured.
Owner:XIDIAN UNIV

Active tracking coverage method based on channel knowledge map in mobile antenna system

The invention discloses an active tracking and covering method based on a channel knowledge map in a mobile antenna system, which aims to maximize the total spectrum efficiency in a service period by expressing an active tracking and covering task of mobile user equipment as a long-term trajectory optimization problem of a mobile antenna. Accurately modeling a dependency relationship of a channel on each surface freedom degree of the antenna by using a control parameter obtained based on a Rodrigues rotation matrix; key physical feasibility constraint conditions are systematically integrated, so that the feasibility of an optimization result in engineering is ensured; a channel knowledge map is introduced to realize proactive planning, and traditional reactive control is converted into active planning by utilizing prediction information, so that performance loss caused by channel information lag is reduced; on the basis of a manifold optimization framework, rotation parameters of the movable antenna system are mapped to a special orthogonal group manifold for optimization, rotation constraints are processed through Lie group operation, and singularity and calculation redundancy caused by traditional parameterization are avoided.
Owner:XIDIAN UNIV

Signal transmitter / receiver, moving means, traffic route, and communication facility

To provide a signal transmitter / receiver capable of achieving both target detection performance and reduction of erroneous detection.SOLUTION: A signal transceiver comprising: a control circuit; an antenna body including an antenna element group that is an assembly of a plurality of antenna elements; and an electromagnetic wave absorber, wherein the electromagnetic wave absorber and the antenna body have all of the following features 1 to 3. Feature 1: An angle φ formed between the electromagnetic wave absorber and the antenna body surface is π / 4 or more and 3 π / 4 or less. Feature 2: An electromagnetic wave absorber is installed toward an electromagnetic wave transmission direction of the antenna body surface. Feature 3: The following expressions 1 and 2 are satisfied, where A (k) is a return loss at a peak top when an electromagnetic wave is incident on the electromagnetic wave absorber from the antenna body at an incident angle k, and θ is an angle formed by a traveling direction of the electromagnetic wave transmitted by the antenna body and a direction of a main side lobe. A (π / 2 - θ)> A (2 π / 3 - θ) Expression 1 A (π / 2 - θ)> A (π / 3 - θ) Expression 2 SELECTED DRAWING: Figure 1
Owner:TORAY INDUSTRIES INC

Antenna arrays and multi-frequency combining antennas

The antenna array includes a reflector and a plurality of high-frequency radiation unit arrays disposed on the reflector; a first and a second low-frequency radiation unit array are disposed on the reflector, wherein high-frequency radiation units are nested within the low-frequency radiation units at the first and second ends of each of the first and second low-frequency radiation unit arrays, and high-frequency radiation units are nested within the remaining low-frequency radiation units of each of the first and second low-frequency radiation unit arrays. The low-frequency radiation units in the first low-frequency radiation unit array and the first high-frequency radiation units of the adjacent outermost high-frequency radiation unit array are staggered within the column, and the low-frequency radiation units in the second low-frequency radiation unit array and the first high-frequency radiation units of the adjacent outermost high-frequency radiation unit array are staggered within the column. This solution has made significant breakthroughs in reducing size and improving antenna surface utilization. While ensuring various technical parameters, it reduces the antenna surface, reduces cost and weight, and meets current communication needs.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD +2