9 results about "Beam broadening" patented technology

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 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 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 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.