74 results about "Directivity diagram" patented technology

The invention discloses an array antenna phase-only real-time beam scanning and side lobe control method based on machine learning. Firstly, array geometry, scanning angles and minor lobe indexes are set; and then, array element excitation phases meeting requirements are rapidly synthesized by using a phase-only fast Fourier FFT (Fast Fourier Transform) algorithm. Constructing a training data set by taking the scanning angle and the minor lobe index as input and the corresponding phase distribution as output; training a neural network by using the data set to obtain a real-time prediction model from initial excitation distribution to accurate excitation distribution; and according to a target expected directional diagram scanning angle and a sidelobe feature, inputting the scanning angle and the sidelobe feature into a neural network to predict and obtain an array element excitation phase so as to realize a real-time phase-only beam and sidelobe control function. Input dimensions are reduced by extracting key features of a directional diagram, data generation is accelerated by means of FFT, real-time performance and precision are both considered, and the method is suitable for fast beam scheduling tasks of various array antennas.

The embodiment of the invention provides an edge detection method and device based on gradient weighted fusion and an adaptive threshold, and is applied to the field of computer vision and digital image processing. The method comprises the steps of firstly preprocessing an input image, then extracting two groups of gradient magnitude diagrams and directional diagrams through an adaptive morphological operator and a traditional difference operator, and constructing a weighted fusion function according to the gradient direction consistency of each pixel point to obtain a fused gradient magnitude diagram; and adaptively determining a high threshold and a low threshold based on an information entropy maximization principle, executing an improved Canny process by combining the fused gradient magnitude diagram and the second gradient directional diagram to obtain an initial edge diagram, and outputting a final edge detection result after dynamic structure element optimization. In this way, the defects that in a traditional edge detection method, gradient information extraction is not precise, threshold selection lacks adaptability, and an edge result is fractured can be overcome, more robust and more accurate image edge detection is achieved, and the reliability of an edge detection algorithm in a complex image scene is improved.

The invention discloses an accurate directional diagram null control robust airspace anti-interference method, which considers a multi-antenna receiver communication scene with interference signals in different incoming wave directions, and improves the output signal to interference plus noise ratio of a receiving end by controlling a receiving array directional diagram to form accurate null in the direction of an interference angle of arrival. Therefore, robust airspace anti-interference is realized. In order to control the nulling direction of a directional diagram, the nulling control problem of the directional diagram is converted, and then a filtering weight vector form capable of accurately controlling nulling of the directional diagram is obtained by using an orthogonal projection theory. And then establishing an optimization problem to maximize the output signal to interference plus noise ratio on the premise of controlling the null of the directional diagram. And finally, solving the optimization problem to obtain an optimal filtering weight vector capable of controlling the directional diagram to form accurate null at the angle of arrival of the interference signal. The model is complete, the design method is reasonable and effective, and directional diagram nulling can be effectively controlled in a communication scene in which a receiver faces interference in multiple directions so as to effectively suppress interference.

The invention discloses a microphone array layout optimization method based on IGSA, and belongs to the field of sound source localization. The method comprises the following steps: firstly, constructing a topological structure of a microphone array as a rectangular array; then, the directivity and the directional diagram of the microphone array are adopted to express the performance of the microphone array; constructing a fitness function through the width of a main lobe, the level of a side lobe and the number of microphones; then, on the basis of a genetic algorithm, improving crossover and mutation steps, adopting a hierarchical crossover strategy and a similarity regulation and control mutation strategy, and simultaneously optimizing an array structure by a simulated annealing operator in an interspersed manner; and finally, outputting the optimal microphone array arrangement to meet the requirements of low sidelobe performance and high resolution. The IGSA algorithm is adopted to optimize the microphone array layout, so that more accurate global optimization, faster convergence speed and better multi-target balance are realized, and particularly, the number of microphones and the hardware cost are remarkably reduced while the sound source localization performance is ensured.

Disclosed in the present invention is a microfluidic antenna with a reconfigurable frequency and directivity pattern. The microfluidic reconfigurable antenna consists of six parts, which are a metal floor, a metal radiation patch, a top reflector, a middle dielectric substrate, a coaxial feeder line penetrating the dielectric substrate, and an annular microfluidic channel packaged with a magnetic liquid metal column, respectively. Different modes can be excited by means of manipulating the length of the magnetic liquid metal column in the microfluidic channel, thus realizing the switching between radiation frequency bands; an antenna directivity pattern is reconfigured by means of manipulating the position of the magnetic liquid metal column; the microfluidic antenna involves main beam switching in a total of ten azimuthal planes within three bands of 5.98-6.10 GHz, 6.08-6.23 GHz and 6.85-7.47 GHz, and the maximum gain values in the states of the three bands are 8.5 dB, 7.4 dB and 8.1 dB, respectively; and the front-to-back ratios are 13 dB, 17 dB and 16 dB, respectively. The present invention has the characteristics of a simple structure, easy integration, a good performance, no introduction of extra distortion, low noise, a high-power operation capability and flexible application.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The utility model provides a waveguide antenna structure with a frequency selective surface structure and a waveguide radar, and the structure comprises a waveguide antenna which is provided with a waveguide slot array and a frequency selective surface structure; the waveguide slot array is arranged on the waveguide antenna in a penetrating manner, and the frequency selective surface structures are distributed on the peripheral side of the waveguide antenna; the frequency selective surface structure comprises surface structure units, and the frequency selective surface structure is formed by arranging a plurality of surface structure units. According to the utility model, the frequency selective surface structure absorbs reflection between the top surface of the antenna and the antenna housing and reduces distortion of a directional diagram; surface waves can be reduced, space coupling between the antennas is reduced, and the isolation between the antennas is improved; the beam directivity can be adjusted, and beam performance specific directivity can be shaped.

The application discloses a kind of consistency construction and multi-dimensional parameter joint setting method and system of space field of course beacon, it is related to aviation technology field, comprising: constructing the three-dimensional electromagnetic simulation model of course beacon antenna array, the radiation directivity diagram of antenna array and channel field type characteristics are analyzed;Antenna array is installed and checked and precision is reviewed;Determine that the radio frequency performance of full transmission link meets the requirements;According to correct transmission link, adopt the method of phase matching to carry out channel antenna pair phase matching and clearance antenna pair phase matching in turn, so that the phase of the radiation signal of each antenna pair is the same, and the spatial consistency of antenna pair is constructed;Near-field-far-field signal joint test setting is carried out, near-field test data and far-field test data are obtained, channel line, displacement sensitivity and clearance signal are evaluated, combined with simulation model and actual environment, complete multi-dimensional parameter joint setting.The method significantly improves the consistency and excellence of the final combined field pattern of the space field of the course beacon, and reduces the trial-and-error cost and rework times of flight verification.

The invention discloses a lens antenna system with a flexibly reconfigurable wave beam, and the system comprises a lens antenna which comprises a target lens and a multi-path receiving and transmitting array arranged on the surface of the target lens; one side of the signal conversion module is connected with the multi-path transceiving array; one side of the digital domain coding module is connected with the other side of the signal conversion module; the target lens is used for adjusting wavefront phases of received and transmitted electromagnetic waves and focusing or parallelizing the received and transmitted electromagnetic waves; the multi-path receiving and transmitting array is used for forming receiving and transmitting directional diagrams in multiple directions through the target lens; the signal conversion module is used for converting signals between the multi-path transceiving array and the digital domain coding module; and the digital domain coding module is used for carrying out digital domain coding processing on the digital domain transmit-receive signal. According to the lens antenna system, the beam forming performance can be improved, meanwhile, flexible reconstruction of the beam is achieved, the anti-interference capacity of the lens antenna system can be improved, and the application scene of the lens antenna system can be expanded.

In order to achieve an object that is to provide a communication control apparatus capable of improving utilization efficiency of frequency bands in communication using beams, the communication control apparatus includes at least one processor, which carries out: a control process of controlling a communication apparatus capable of communicating with a plurality of communication terminals by irradiating the plurality of communication terminals with a radio wave beam from an antenna; an acquisition process of acquiring control information that includes terminal position information indicating positions of the plurality of communication terminals, apparatus position information indicating a position of the communication apparatus, and constraint information including information indicating a physical constraint of the antenna; and a determination process of determining, on the basis of the control information, a directivity pattern of the antenna in generation of the beam, and allocation of a frequency band to the beam.

The invention relates to a satellite-borne synthetic aperture radar in-orbit calibration method and system, and belongs to the technical field of satellite-borne SAR calibration, and the method comprises the steps: selecting a uniform scene target to execute a calibration task after a satellite enters an orbit and before a conventional observation task is executed, and obtaining an initial value of a distance direction beam pointing calibration parameter; in the conventional observation task, a pointing calibration area and a calibration observation period for the pointing calibration area are determined; based on business data of a conventional observation task, calculating a distance directional diagram for observing a pointing calibration area in a calibration observation period; and gradually comparing the observed distance directional diagrams, inverting the distance pointing deviation of the current observation relative to the previous observation, correcting the current distance directional diagram, updating the current distance beam pointing calibration parameters, and ensuring the accuracy of the conventional observation task business data in each calibration observation period. The on-orbit calibration method is efficient and convenient, and the task arrangement frequency is reduced.

The invention relates to the field of traffic planning route optimization, and discloses a traffic route space and passenger flow pattern optimization method and system, and a storage medium. The traffic line space and passenger flow directional diagram optimization method comprises the following steps: acquiring a station position and section passenger flow information of a traffic line in a target area, and generating a space direction division method; reconstructing the traffic line based on the section passenger flow information to obtain a reconstructed line diagram; forming sub-lines by adjacent stations in the reconstructed line diagram, and translating starting points of the sub-lines to the same position to obtain a space directional diagram and a passenger flow directional diagram; according to a space direction division method, respectively grouping the space directional diagram and the passenger flow directional diagram; and calculating the grouped space directional diagram and passenger flow directional diagram based on a preset method to obtain a space directional value and a passenger flow directional value. According to the method, the traffic line space direction and the passenger flow direction can be quantitatively described, the integrity of current traffic description in the region is improved, and subsequent traffic line planning and prediction are served and supported.

The invention discloses an antenna assembly, and relates to the technical field of Internet of Things. The antenna assembly comprises an antenna and a reflecting plate, the reflecting plate is provided with a reflecting surface, the antenna and the reflecting plate are arranged at an interval, the antenna and the reflecting surface are oppositely arranged, and the reflecting surface is used for adjusting an antenna pattern of the antenna. According to the embodiment of the invention, the antenna pattern is adjusted by arranging the reflecting plate with the reflecting surface, an antenna does not need to be customized for each scene, the cost is saved, and the implementation difficulty is low.

The invention discloses a miniaturized double-slot Vivaldi sum-difference beam antenna for target positioning and tracking. The miniaturized double-slot Vivaldi sum-difference beam antenna comprises a double-slot radiation patch, a dielectric substrate and two sum-difference microstrip feed structures, when the phases of the incident signals of the two ports are consistent, a difference beam is generated; and when the difference is 180 degrees, a sum beam is generated. Furthermore, in order to reduce the mutual coupling effect between the two ports, a trapezoidal structure (flow repression groove) is dug out at the most front end of the radiation patch, and a small quadrangular prism is dug out at the corresponding position of the dielectric substrate. Furthermore, the front end part of the dielectric substrate is extended downwards by 0.8 mm and is equivalent to a director, so that the antenna gain is improved. The size of the final antenna is 61 * 48.6 * 1.6 (mm < 3 >), the working bandwidth of the wave beam is 2.85-21GHz, the gain in the frequency band of 6-21GHz is greater than 8dBi, and a directional diagram has high symmetry. The difference beam working bandwidth is 4.35-20.85 GHz, the sidelobe level is low, the anti-interference capability is high, and the directional diagram has high symmetry. The method has great application value in the field of target tracking and positioning.

The present application relates to the technical field of millimeter wave radar signal processing, in particular to a millimeter wave radar pitch angle ambiguity discrimination method based on directional diagram features and machine learning, and the specific steps are as follows: S1, channel response directional diagram data collection; S2, training data generation; S3, data enhancement processing; S4, feature data preprocessing; S5, model training and optimization; S6, model verification and evaluation; S7, ambiguity discrimination and confidence output; In the complex environment and multi-target scene, unlike the traditional method, the shortcomings of the prior art are overcome, the directional diagram features are introduced, the radar hardware channel characteristics are fully utilized, the channel response directional diagram features and the machine learning model are combined, the performance of the pitch angle ambiguity discrimination is improved, the feature extraction and model inference calculation amount are small, and the real-time processing requirements of the radar are met.

The invention discloses an irregular subarray division design method for a low-sidelobe wide-angle scanning array antenna, and solves the problem that the optimization time is long due to the slow speed of calculating the sidelobe level in the prior art. The method comprises the steps of discretizing an array plane into an array element set, performing permutation and combination on array elements in the array element set to obtain a sub-array position combination set, and constructing a dictionary matrix; converting a sub-array division problem into a set coverage problem, solving a binary selection vector to enable the dictionary matrix and the binary selection vector to obtain a whole-row vector, and further obtaining a candidate sub-array combination set of a coverage array surface; constructing an irregular subarray division design model, and screening the candidate subarray combination set to obtain an optimal subarray division result; optimizing the excitation amplitude of the optimal sub-array division result by using the optimal sub-array division result and adopting a grey wolf optimization algorithm so as to reduce the sidelobe level of the directional diagram; according to the method, direct calculation of the sidelobe level is replaced, so that the calculation efficiency is improved.

The application discloses a sum and difference beam optimization method of a cover array antenna, and comprises the following steps: creating an array antenna model and a cover array antenna model; performing quadrilateral mesh division on the models respectively; based on the corresponding quadrilateral mesh division of the models, performing simulation calculation by using a high-order moment method, and extracting corresponding active unit directional diagrams; applying excitation to the antenna units in the models, combining the active unit directional diagrams, calculating the sum and difference beams of the models under different scanning angles, and comparing corresponding performance indexes; and using an improved hybrid differential evolution algorithm to optimize the sum and difference beams of the cover array antenna model which does not meet the index requirements; wherein the improved hybrid differential evolution algorithm performs global and local iterative searches, and adaptively calculates a mutation factor and a crossover factor in the global and local iterative search processes. The application realizes the optimization design of the sum and difference beams of the cover array antenna, and is more in line with engineering application requirements.

The invention discloses a quick correction method for a phase value of a phased beam scanning wave control table, which belongs to the array antenna technology, and is characterized in that a homogenized directional diagram of an antenna unit in an array provided by the invention is calculated only through full-wave simulation or test of an individual beam position of an antipode; on the basis, the phase correction value of each beam position in the beam control table can be quickly obtained, and the purpose of quickly correcting the array beam pointing deviation is achieved. According to the method for rapidly correcting the phase value of the phased beam scanning wave control table, mutual coupling between antenna units in an array does not need to be specially researched, full-wave simulation or debugging testing does not need to be carried out on beam positions of the whole array one by one, the method can be implemented in a design stage and a verification test stage, and the method is high in practicability. The method has the advantages of high correction precision, high speed, wide applicability, easiness in implementation, low cost and the like.

The invention relates to an antenna array synthesis directional diagram estimation method based on a multi-unit antenna actual measurement directional diagram and application, and the method comprises the following steps: in a standard test environment, measuring an azimuth plane or pitching plane directional diagram of each antenna unit, recording angle gain or power data, and obtaining actual measurement data; establishing a coordinate system, determining antenna reference positions and inter-unit parameters, dividing every two antennas into one group, and scoring groups and parameters; according to the directivity multiplication principle, a double-antenna composite graph computational logic (estimation formula) is established, and data simulation is substituted to obtain a composite graph; and taking the composite diagram as a quasi-unit diagram, and repeating the operation to complete the estimation of the composite directional diagram of the multi-unit antenna array. According to the method, the defects of complex modeling, large calculation amount and poor adaptability of a traditional theory multi-unit antenna array can be avoided, the blank in the prior art is filled, the estimation efficiency and precision can be effectively improved, the requirement for rapid and accurate analysis of the performance of a multi-antenna system in engineering is met, and reliable support is provided for design optimization of the antenna array.

The invention particularly relates to a sparse array DOA (direction of arrival) estimation method based on an optimized array manifold dictionary, and the method comprises the steps: firstly carrying out the layout optimization of an initial uniform area array through combining a genetic algorithm, constructing an eight-element sparse array structure, and maintaining a directional diagram which is close to a full array while greatly reducing the number of array elements; performing energy screening on multichannel observation signals acquired by the sparse array, and extracting a dominant frequency band to improve an effective signal-to-noise ratio; and an optimized array manifold dictionary is constructed based on a phase compensation mechanism and an amplitude weighting mechanism, and the internal correlation of the dictionary is reduced by minimizing off-diagonal elements of a dictionary Gramer matrix. And on the basis, sparse reconstruction is carried out on the optimized dictionary by using an orthogonal matching pursuit algorithm, so that a direction-of-arrival estimation result of the sound source signal is obtained. According to the scheme, inherent direction finding fuzziness and grating lobes of the sparse array are effectively suppressed, the direction estimation precision is improved, and high reliability and high robustness are still kept under the condition that the number of array elements is remarkably reduced.

The present application provides an array layout method and device based on the joint sparse recovery technology. The method includes: determining the array aperture size, the number of dictionary grid points, the total number of reference direction diagrams, and the number of Hermitian reference direction diagrams according to the reference multi-direction diagram for array optimization; solving the joint sparse problem to obtain the measurement vector and the observation matrix of the sparse matching task; estimating the sparse weight vector by using the relevance vector machine algorithm; and assigning weights to individual patterns to obtain the excitation vector of the direction diagram. The advantages of the present application are as follows: By using the method of the present application, only by changing the element excitation, it is possible to reconstruct the same multi-direction diagram as the uniform array with fewer elements, that is, the same element positions are shared among different direction diagrams; The array layout method based on the joint sparse recovery technology not only meets the constraints on the expected main lobe width and sidelobe level, but also matches the entire reference direction diagram with precise details.

The application relates to an antenna layout method and system for ground penetrating radar receiving end beam forming, and relates to the field of ground penetrating radar detection. The method solves the problem that, in a conventional ground penetrating radar, a multi-channel scheme is adopted, the number of transmitting and receiving antennas is increased to improve the lateral detection range, and due to time lag of channel data and beam forming difficulty, the potential of the array antenna cannot be fully utilized. The method comprises the following steps: determining the form of a ground penetrating radar antenna array according to the requirement of beam forming; constructing an equivalent directional diagram of the antenna array layout according to the form of the radar antenna array; suppressing the grating lobe phenomenon in the equivalent directional diagram of the antenna array layout; suppressing the coupling effect in the equivalent directional diagram of the antenna array layout; and suppressing the direct wave from the transmitting antenna to the receiving antenna according to the polarization direction of the antenna in the suppressed equivalent directional diagram, so as to complete the antenna layout. The application is applied to the field of underground nondestructive imaging.

The invention relates to the technical field of antennas, in particular to a beam vector superposition method for multi-beam antenna design, which comprises the following steps: firstly, acquiring directional diagram information of a feed source antenna, then presetting a longitudinal distance from a lens focal plane to a feed source, the number of plane grids and unit width, then acquiring basic requirements of multiple beams, and according to a target requirement, calculating a multi-beam vector according to the target requirement; dielectric units are designed, S parameters and phase characteristics of the units are evaluated, finally, phase distribution needing to be compensated by the lens is obtained through a phase compensation scheme of a beam vector superposition algorithm, and the dielectric units are reasonably arranged. In addition, the feasibility and effectiveness of the method are verified by manufacturing a test prototype. A simulation experiment verifies that flexible control of the number of multiple beams and free adjustment of sub-beam pointing can be realized, and improvement of gain of each sub-beam, narrowing of beam width, low sidelobe level and deepest null can be realized under the condition that the requirements of the number of the beams, the sub-beam pointing and the like are met.

The invention relates to a radar metal ball calibration method and device, computer equipment and a medium, and the method comprises the steps: obtaining the directional diagram data of a radar transmitting antenna and a receiving antenna, carrying out the normalization processing of the directional diagram data, and obtaining the normalized data; on the basis of the normalized data of the corresponding angles, discrete grids are constructed, and solid angle infinitesimal elements of all grids in the discrete grids are calculated; performing discrete integral operation on the normalized data of the corresponding angle based on the solid angle infinitesimal to obtain integral data of the corresponding angle; obtaining an input parameter of radar calibration, and calculating a theoretical reflectivity factor of the receiving antenna at each angle based on the input parameter and the integral data; and calculating a corresponding radar calibration parameter based on the theoretical reflectivity factor of each angle, and transmitting the radar calibration parameter to a signal processor to complete system calibration. According to the method, the calibration precision of the radar system in the wide-transmitting narrow-receiving mode can be improved.

The application relates to the technical field of antenna channel calibration, in particular to a plate array antenna multi-channel directional diagram resolution global calibration method and system, and the application proposes the following scheme: firstly, local calibration is carried out, a local target function is constructed by extracting directional diagram characteristics of each channel, and initial compensation parameters are obtained through an optimization method; if a global optimization stage condition is met, a particle swarm algorithm is introduced, a recognition subspace is established based on resolution in a dual-role particle structure, and a pattern avoidance drive is applied to a controlled collaborative particle, so that global optimization calibration of the directional diagram is realized. The application improves the resolution and spatial structure regulation and control capability of the directional diagram.

The application belongs to the technical field of wireless communication, and discloses a 1Bit reflection array phase optimization method, which comprises the following steps: step 1: initializing a population, i.e. a parent; step 2: combining a fast Fourier transform to calculate a target value of the parent; step 3: calculating the fitness and selection probability of an individual according to the target value; step 4: selecting, crossing and mutating the population individual to generate a new phase distribution, i.e. a child; step 5: repeating step 2 to calculate a target value of the child; step 6: selecting a new target value according to the target values of the child and the parent, and repeating steps 2 to 6 until an optimal solution is optimized; and step 7: verifying the correctness of the optimization result of the algorithm and the correctness of the optimization of the optimized directivity pattern. The application adopts a simplified directivity pattern calculation formula and combines a fast Fourier transform to speed up the calculation of the directivity pattern target value under different phase distributions, reduce the optimized gene sequence of the algorithm, and improve the optimization speed and convergence speed of the algorithm.

The invention provides terminal equipment. The terminal equipment comprises an antenna unit, a metal floor and at least one choke structure, the antenna unit comprises a radiator, and the radiator resonates in a target frequency band under excitation of a feed signal; the radiator is arranged adjacent to the first edge, and when the first feed source provides a first feed source signal to excite the radiator to resonate in a target frequency band, the metal floor is coupled with the radiator to be excited to generate current; the at least one choking structure comprises a choking structure which is connected with the first edge and meets a first position relation with the radiation body projection of the radiation body on the first edge; and / or a choke structure which is connected with at least one of the second edge and the third edge and satisfies a second position relationship with the projection of the radiator, the at least one choke structure resonates in a target frequency band and is used for enabling the length of current on the edge where the at least one choke structure in the metal floor is located to be within a preset range; therefore, the directivity or beam width of a directional diagram of the antenna unit can be selectively improved.

The application relates to the technical field of antenna array directional diagram, and relates to a grating lobe suppression method based on a reconfigurable lens unit directional diagram. best，G The optimal decision variable X of each lens unit is calculated based on a differential evolution algorithm according to lens array parameters to suppress grating lobes. The reconfigurable lens antenna array grating lobe suppression technology based on the differential evolution algorithm breaks the periodicity of the array layout equivalently by using the reconfigurable directional diagram of the lens antenna, so that the effect of suppressing grating lobes is achieved, and the generation of grating lobes is reduced in a large-angle scanning range of the large-interval lens array.

The invention discloses a four-direction pattern reconfigurable antenna. The antenna is of a rotational symmetric structure composed of a single-layer dielectric substrate and a double-layer four-direction radiation structure. The antenna takes an electric dipole structure as a basic radiation structure, directional radiation of the antenna is realized by introducing a reflection structure, radiation gain of the antenna is improved by introducing a guide structure, impedance matching of the antenna is improved and bandwidth of the antenna is broadened by adding a U-shaped groove structure in the electric dipole radiation structure, and in order to realize reconfiguration of a directional diagram of the antenna, the antenna is provided with a U-shaped groove structure. An antenna structure is rotated, four pairs of PIN diodes and corresponding control circuits are added in parallel double lines of a feed structure, and the radiation direction of the antenna is controlled by controlling the opening and closing states of the PIN diode pairs. Due to introduction of the reflection structure and the guide structure, the directional radiation capability and the antenna gain of the antenna are improved, the communication distance is increased, and the working bandwidth of the antenna can be widened; the design of the direct-current feed structure enables the radiation direction of the antenna to be controlled more flexibly.

According to the radar digital array directional diagram optimization method based on the genetic algorithm, the radar digital array directional diagram optimization is achieved through the genetic algorithm, complex mathematical derivation is not needed, the method is suitable for a nonlinear scene which is difficult to process through an analysis method, implementation is easy, the solving speed is high, and the method is suitable for large-scale popularization and application. An optimization scheme meeting engineering requirements can be quickly given; by accurately constructing a cost function and combining flexible setting of a weight constraint condition, the method can adapt to various optimization targets, realizes different types of directional diagram optimization of amplitude synthesis, phase synthesis, complex synthesis and the like, and is high in adaptability; the genetic algorithm guarantees population diversity and global search ability through selection, crossover and mutation operation, and compared with a particle swarm optimization algorithm, lower cost function values can be obtained in part of scenes, and the optimization effect is better; meanwhile, through the arrangement of the main lobe separation mark, the minor lobe adjustment process is simplified, and the engineering practicability is improved.