18 results about "Beam broadening" patented technology

Disclosed are a wide-angle beam-scanning phased array based on near-field coupling and port self-decoupling and a design method thereof. This design method is different from traditional methods that require introduction of additional beam-broadening and decoupling structures, but aims to obtain wide-beam active element pattern by cleverly utilizing a near-field coupling effect between elements. Meanwhile, port self-decoupling technology is introduced into the phased array to achieve high port isolation and improve beam gain at large scanning angle. Therefore, a phased array with an extremely simple structure and an excellent beam-scanning performance, can be constructed based on typical narrow-beam antenna elements, without requiring additional beam broadening and decoupling structures.

Aspects of the disclosure relate to user equipment (UE)-assisted beam broadening in a wireless communication system configured to employ beamforming. A UE may determine downlink channel characteristics by monitoring for, receiving, and measuring a suitable downlink reference signal. Based on the channel characteristics the UE may select a wide beam corresponding to a set of narrow beams. The UE may then transmit a report identifying the selected wide beam by indicating a direction of the selected wide beam and an angular width of the selected wide beam. Other aspects, embodiments, and features are also claimed and described.

A short-circuit rectangular metal patch and a dielectric slot act on a cavity-backed substrate integrated dielectric resonator, and by utilizing a newly-added mode of the short-circuit rectangular metal patch and a matching effect of the short-circuit rectangular metal patch and the dielectric slot on a slot mode and an adjusting effect of the short-circuit rectangular metal patch and the dielectric slot on amplitude distribution of an electric field of four modes, the broadband stable beam broadening dielectric resonator filtering antenna is obtained. By combining a low-frequency out-of-band radiation zero point generated by the whole resonator and a high-frequency out-of-band wave limiting effect of the U-shaped groove, the broadband wide-beam dielectric resonator antenna is realized, and the broadband wide-beam dielectric resonator antenna has the advantages of broadband stable beam broadening and integration of a filtering function, and can simultaneously take substrate integration and low profile into account.

The invention discloses a beam broadening phase generation method based on hierarchical optimization, and the method comprises the following steps: 1, the configuration of X-waveband phased array weather radar parameters and primary optimization parameters; 2, the selection of a phase construction function; 3, the rapid calculation of a directional diagram based on matrix operation; 4, the selection of a calculation method of robust beam width; step 6, optimization objective function setting; and step 7, directional diagram secondary optimization based on a random phase. According to the method disclosed by the invention, beam broadening can be realized through the phase weight on the premise of not using variable amplitude weight and reducing the number of used antenna arrays, and the method has important significance in improving wide transmitting and narrow receiving capabilities of an X-band phased array weather radar and improving the time resolution of the radar.

The invention relates to the technical field of wireless communication, in particular to an antenna radiation unit and an antenna, the antenna radiation unit comprises a radiation unit body and a phase adjusting structure arranged above the radiation unit body, and the phase adjusting structure is a metal ring array formed by arranging a plurality of metal ring units in an array mode. The spherical wave conversion module is used for converting the spherical wave emitted by the radiation unit body into a plane-like wave to realize beam convergence; the metal ring array is composed of multiple stages of metal ring sub-arrays which are concentrically arranged, the sizes of the metal ring units of all stages from inside to outside are gradually increased, the electromagnetic wave phase can be accurately regulated and controlled, spherical waves are converted into plane-like waves, beam broadening and narrowing can be effectively achieved while S parameters are not affected, the requirements of different wave widths are met, and the application range is wide. The performance of the radiation unit is improved, and the antenna directivity and radiation efficiency are significantly improved.

The invention discloses a wide-area radar system combining satellite-borne mechanical scanning and phase scanning. The wide-area radar system is composed of a central processing unit, a servo controller, an active phased-array antenna and a scanning mechanism. The servo controller is mounted on the platform cabin, is rigidly connected and does not rotate; the central processing unit and the active phased-array antenna are installed on the load cabin, the load cabin is connected with the platform cabin through the scanning mechanism, and the servo controller controls the whole load cabin to rotate around the center of the load cabin. According to the method, a brand new satellite-borne wide-area radar system architecture is constructed, mechanical scanning and electric scanning characteristics are combined, flexible control of beam broadening, tracking staring, wide-area searching, frequency agility, power control and the like of a radar system is supported, and the method has an application mode integrating detection, tracking, imaging and recognition.

The invention discloses a phased-array antenna beam broadening optimization method and system, and belongs to the technical field of array antenna design. According to the method, the ambiguity and randomness of addressing are quantized by adopting a self-iteration model, the speed and direction of particle addressing are dynamically adjusted by combining parameters such as expectation and entropy, and the optimization efficiency is greatly improved; grading weights are adopted during cross fusion, so that screening of particles of different levels is facilitated, different weights are assigned to different particles, invalid movement of the particles is effectively avoided, and the probability of finding a better solution is improved while the particles tend to a globally optimal solution; when the method is applied to a radar system, the radiation performance of the system can be effectively improved, and the reconnaissance range of the system is widened.

The application provides a beam widening method, device and equipment, and relates to the technical field of computers.The method comprises the following steps: acquiring a preset beam angle coverage range of an antenna system, the antenna system comprising N*M antenna units; determining a target beam combination according to M and N; the target beam combination comprising N horizontal target beams and M vertical target beams; a phase difference of the horizontal target beam is positively correlated with a first serial number; a phase difference of the vertical target beam is positively correlated with a second serial number; a peak angle of each target beam is within the beam angle coverage range; a difference between a first peak angle and a first angle is less than a first threshold value; a difference between a second peak angle and a second angle is less than a second threshold value; and the antenna system is subjected to beam widening according to the target beam combination.The application can widen the beam of the antenna system without sacrificing the antenna power.

This invention belongs to the field of satellite communication technology, and particularly relates to a method for enhancing satellite antenna control channel coverage based on dynamic beamspan. The method includes: determining the number of symbols and symbol positions of the uplink and downlink control channels to initialize the satellite antenna control channels; wherein the number of symbols and symbol positions of the uplink and downlink control channels correspond to the symbol time slots of the initialized satellite antenna control channels; judging scheduling events based on the initialized satellite antenna control channels to determine the beamspanning mode of the uplink and downlink control channels; and transmitting and / or receiving the uplink control channels after beamspanning in the symbol time slots of the initialized satellite antenna control channels, thereby completing the satellite antenna control channel coverage enhancement. This invention achieves effective coverage of the access beam area by the uplink and downlink control channels of the data beam, thereby eliminating uplink scheduling and uplink periodic signal blind spots.

The embodiment of the invention relates to the technical field of automatic driving, and discloses an antenna array and an automatic driving system.The antenna array comprises a circuit board, a first metal plate, a second metal plate, a first antenna unit, a second antenna unit and a choke structure, and the first antenna unit comprises a first antenna, a second antenna and a third antenna; the first antenna unit comprises a first radiation assembly, a first cavity and a first waveguide channel, the second antenna unit comprises a fourth antenna, a fifth antenna, a sixth antenna, a seventh antenna and an eighth antenna, and the fourth antenna comprises a second cavity, a second radiation assembly and a second waveguide channel. And the choke structure is used for controlling the beam shapes of the first antenna unit and the second antenna unit. Through the above mode, the phase distribution characteristics of the antenna array during electromagnetic wave radiation can be optimized, the problem of excessive concentration of phases is avoided, and thus the beam broadening capability of the antenna array in the horizontal plane direction is improved.

The invention discloses a broadband circularly polarized dielectric resonator antenna with double-sided beam broadening. The antenna is sequentially provided with a first dielectric block, a first metal layer, a second dielectric block, a metal ground layer, a dielectric substrate and a second metal layer from top to bottom, the first dielectric block is rectangular, the second dielectric block is in a centrosymmetric cross shape, the first metal layer comprises four centrosymmetric rectangular metal patches and a pair of 45-degree oblique symmetric metal strips, a fork-shaped feed groove is etched in the metal ground layer, and the second metal layer is of a linear microstrip feed structure. A signal is coupled to the fork-shaped feed groove through the microstrip feed structure, the laminated dielectric block is excited to generate an orthogonal mode to form right-handed circular polarization, the rectangular metal patch realizes beam broadening, and the metal strip inhibits left-handed circular polarization to broaden the axial ratio bandwidth. The antenna is wide in bandwidth, can achieve double-sided beam broadening, facilitates array scanning, and is suitable for the fields of satellite communication and the like.

The present invention discloses a wide-beam dipole antenna array with low mutual coupling, comprising: a metal ground, a half-wave symmetric oscillator array arranged in a linear interval parallel to the metal ground, and in the array additional structure, a long stub is respectively arranged at the middle of two adjacent half-wave symmetric oscillators and at both ends of the array, and the long stub is vertically connected to the metal ground; a group of short stubs is correspondingly arranged below each half-wave symmetric oscillator, and each group of short stubs has four and is vertically connected to the metal ground, and the four short stubs are distributed in pairs at both ends of the half-wave symmetric oscillator and are located on the upper and lower sides of the linear arrangement direction. The present invention utilizes the even-mode impedance adjustment effect of the middle stub of the dipole and the beam broadening effect of the overall additional structure on the E plane H plane to synchronously achieve low mutual coupling between units and beam broadening of the units, and can take into account the adaptability of the decoupling level, decoupling bandwidth and matching bandwidth, profile height, structural complexity, low cost and stability of the in-band beam width.

The application provides a phased array antenna beam broadening method, electronic equipment and a readable storage medium. The method comprises the following steps: constructing an optimization fitness function suitable for a phased array antenna, wherein the optimization fitness function comprises a normalized weighted combination of a beam width term for guiding an optimized half-power beam width to approximate a target beam width and a sidelobe level term for guiding an optimized sidelobe level to approximate a sidelobe suppression reference level; setting array physical parameters and beam optimization target parameters; initializing a meta-heuristic algorithm and generating an initial population, each individual in the initial population corresponding to a phase configuration scheme of all elements in the phased array antenna; starting an iterative optimization cycle, and in the case that the fitness value of each individual in the current population does not satisfy an iteration end condition, sequentially performing elite population screening, algorithm parameter updating, mutation operation, crossover operation and greedy selection operation to obtain a population of the next iteration.

This application discloses a beam control method and related products for a curved phased array weather radar, wherein the radar has multiple antenna elements arranged along an arc surface. In this scheme, M consecutively arranged antenna elements are selected from the multiple antenna elements to form a subarray, with only the antenna elements in the current subarray operating. A phase compensation amount is determined based on the position of each antenna element on the arc surface, causing the beam formed by the subarray to point towards the normal direction of the chord of its corresponding arc surface. The current beam is generated based on the phase compensation amount. The subarray is slid along the arc surface to a new starting position with a preset step, and the above steps are repeated to form multiple beams with different directions at different time periods. This application uses phase compensation to equate the curved subarray to a normal planar linear array, avoiding beam broadening and gain reduction problems. By sliding the subarray, each beam maintains its normal characteristics, achieving consistent beam performance across the entire scanning range and effectively improving the radar's observation accuracy.

The invention discloses a stable wide-beam broadband end-on-fire antenna, which is characterized in that a pair of inclined Y-shaped metal structures and a pair of inverted L-shaped metal structures are symmetrically distributed on two sides of the front and the rear of a dipole in a face-to-face and back-to-back manner, and multi-current distribution and resonance of the inclined Y-shaped metal structures are utilized; the end-on-fire antenna for broadband E-plane beam broadening and broadband impedance matching is realized through the vertical current compensation of the inverted L-shaped metal structure and the reduction of quality factors, and the end-on-fire antenna has the characteristics of high beam broadening degree and good beam width consistency.

The invention belongs to the technical field of optical communication, and particularly relates to a method for determining transmission characteristics of a double-vortex light beam in ocean turbulence, and the method comprises the steps: constructing a double-vortex light beam source field through coaxially superposing two Laguerre Gaussian light beams; simulating the influence of ocean turbulence based on a random phase screen theory and a power spectrum inversion method, and calculating the light intensity and phase distribution of a receiving end in combination with an angular spectrum transmission theory; finally, orbital angular momentum mode distribution is analyzed through spiral harmonic expansion, and a relation model of light beam broadening and transmission distance is established. The characteristic that the orbital angular momentum energy retention rate of a double-vortex light beam in ocean turbulence is higher than that of a single-vortex light beam is revealed for the first time, it is found that when the topological charge difference v is smaller than or equal to 3, the transmission stability is optimal, and meanwhile the influence rule of parameters such as the turbulent flow energy dissipation rate and the temperature variance dissipation rate on light beam broadening is quantified; and the optical communication quality and the target detection precision in the marine environment can be obviously improved.

The application discloses a kind of wideband dual-polarized indoor antennas of beam symmetry broadening, orthogonal mosaic balun is located between orthogonal dual-polarized printed dipole and square metal ground;The bottom end of each balun is used as signal feed port, and the top end of each balun is respectively inserted into the rectangular through hole of a pair of dipoles;Four cross-shaped folded edge metal strips are respectively supported by support above orthogonal dual-polarized printed dipole, and are respectively arranged end to end along the polarization direction of two orthogonal dipoles;Four trapezoidal right-angle bending plates are distributed at four diagonal positions of orthogonal dual-polarized printed dipole, and the bottom is connected with square metal ground.The application acts on orthogonal dual-polarized printed dipole by symmetrically distributed cross-shaped folded edge metal strip and trapezoidal right-angle bending plate, and the effects of the two on high frequency and low frequency E surface, H symmetrical beam broadening and the expansion effect on impedance matching bandwidth are utilized, and wide dual-surface symmetrical beam broadening bandwidth and impedance matching bandwidth are realized.

The present invention relates to a method for calculating the propagation characteristics of Gaussian beams in anisotropic hypersonic plasma turbulence. Based on the power spectrum of the refractive index fluctuations of anisotropic plasma turbulence and the Rytov approximation theory, the long-term beam broadening and scintillation index of Gaussian beams in anisotropic plasma turbulence are solved. Two anisotropy factors are introduced to parameterize the anisotropic characteristics of the turbulence unit in the horizontal and vertical directions. The long-term beam broadening and scintillation index are simulated, and ultimately the propagation characteristic data of Gaussian beams in anisotropic hypersonic plasma turbulence are obtained. This method for calculating the propagation characteristics of Gaussian beams in anisotropic hypersonic plasma turbulence overcomes the shortcomings of the propagation characteristics of Gaussian beams in anisotropic hypersonic plasma turbulence, making the wave propagation problem in hypersonic plasma turbulence not only based on isotropy, but also providing a theoretical basis for subsequent electromagnetic wave propagation problems in plasma turbulence.