13 results about "Array factor" patented technology

For example, an antenna array can comprise a multitude of antenna elements arranged in a configuration that provides a predefined array factor including a main beam between a first angle and a second angle; a first sidelobe (SL) region between the first angle and a third angle, including one or more first SL peaks below a predefined array factor value; a second SL region between the second angle and a fourth angle, including one or more second SL peaks below the predefined array factor value; and a third SL region between the third angle and a fifth angle, including one or more third SL peaks above the predefined array factor value.and a fourth SL area between the fourth angle and a sixth angle, which includes one or more fourth SL peaks above the predefined array factor value.

The application discloses a low sidelobe pattern synthesis method, device and equipment and a storage medium, relates to the technical field of antennas, and comprises the following steps: simplifying an array factor response expression according to the structural symmetry of an antenna array to be optimized and representing the array factor response expression in a vector form; taking the maximum simplified array factor response on discrete sampling points in a sidelobe region as an optimization target, taking the initial upper limit and lower limit of the main lobe gain and the element weight value of the antenna array to be optimized as constraints, and modeling the low sidelobe pattern synthesis problem as a linear programming problem; solving the linear programming problem to obtain optimized element weight values and corresponding array factor patterns; if the system EIRP or G / T value does not satisfy the corresponding set value, adjusting the initial upper limit and lower limit of the element weight value, and solving the linear programming problem again. The application reduces the optimization variable dimension and the constraint number of the convex optimization problem, and greatly improves the operation efficiency under the condition of global optimization.

The application discloses a kind of high-efficiency accurate conformal transmission array design methods, comprising: setting fine model and coarse model;Using swarm intelligence algorithm optimization to obtain coarse model optimal solution, and as fine model initial parameter;Using swarm intelligence algorithm extracts coarse model parameter corresponding to fine model parameter;According to the principle of space mapping, update mapping matrix, predict next step fine model parameter;Repeat the last two steps until the design result of fine model meets the requirement or mapping converges.The application proposes to combine space mapping algorithm and swarm intelligence algorithm to optimize the phase distribution of transmission array surface, designs conformal transmission array based on considering actual amplitude and phase error, and realizes excellent conformal transmission array.The method converts the full-wave simulation process (fine model) of transmission array into efficient array factor (coarse model) optimization process through parameter extraction, so that complex transmission array optimization can be successfully realized.

The invention discloses a group target electromagnetic scattering rapid calculation method with linear complexity. The method comprises the following steps: extracting characteristic current and characteristic value from a single target in group targets, and multiplexing the characteristic current and characteristic value to other targets to linearly reconstruct induced current generated by each target under external excitation; carrying out region division; a multi-layer fast multipole algorithm and a fast multipole algorithm are adopted for calculation of the coupling mode weight coefficient between every two targets in each area and the coupling mode weight coefficient between the targets in different areas, and induced currents of the targets under the electromagnetic coupling effect are calculated; calculating the final stable induction current of each target in the group targets; and the total scattering field of the final group target is obtained through array factor superposition, and then the RCS of the group target is obtained. The rapid and accurate calculation of the group target RCS is realized by calculating the induction current of each target in the group target through mode reconstruction and accelerating the calculation of electromagnetic coupling between the targets through the two-stage rapid multi-pole sub-frame.

Disclosed is a method performed by a network node (130) of a wireless communication network (100), for configuring an intelligent reflective surface, IRS (150) of the wireless communication network (100), the IRS (150) comprising a plurality of dual-polarized reflective elements. The method comprises determining a configuration for the IRS, the configuration comprising individual phase shifts per first and second polarization of the plurality of dual-polarized reflective elements, determined so that the IRS can redirect a signal, received from the network node as a dual-polarized beam, over an angular sector made up from a plurality of angular subsectors, as a beam having substantially same power-domain array factor over the angular subsectors Hereby, the IRS (150) is able to reflect a signal received from the network node (130) as a broad beam towards one or more wireless devices (140, 142) residing in the angular sector.

The invention provides a method for quantifying the influence of amplitude-phase tapering of a quiet zone on antenna radiation characteristic parameters, and the method comprises the steps: measuring the scattering data of a standard antenna based on a preset position point of the quiet zone of a compact range, and obtaining the actual measurement statistical characteristics; constructing a function model for describing coning distribution on the basis of the actually measured statistical characteristics, wherein the function model describes the relationship between amplitude coning and phase coning of the quiet zone and the spatial position; correcting an amplitude weight and a phase weight of the antenna array unit to be measured based on the function model; calculating a corrected array factor and a total directional diagram according to the amplitude weight and the phase weight; and determining a radiation characteristic parameter difference value of the to-be-tested antenna according to the corrected array factor and the total directional diagram. According to the invention, the influence of the amplitude-phase tapering of the quiet zone on the radiation characteristic parameters of the antenna is quantified, and simulation analysis based on numerical values can be realized.

This invention relates to the field of antenna technology, providing a beamforming modulation method and apparatus for bit-reconfigurable leaky-wave antennas. The method includes: acquiring a target beam direction set and array parameters; initializing the modulation state of the radiating elements; and iteratively optimizing the following process: randomly selecting any radiating element, calculating the current function value of a preset objective function corresponding to all possible modulation states for that radiating element, and updating the modulation state of that radiating element to the target state that maximizes the current function value; and outputting the optimized modulation state to control beamforming after satisfying a preset iteration termination condition. This invention combines an array factor model with random iterative optimization to achieve adaptive solution and precise control of the optimal modulation state of the radiating elements of a bit-reconfigurable leaky-wave antenna. It does not rely on single-bit quantization, is not limited by the antenna's physical period, and can flexibly and efficiently support complex multi-beam synthesis.

A base station device according to the present invention comprises: a beam squint estimation unit that estimates a beam squint on the basis of a reference signal for estimating the beam squint or a theoretical formula of an array factor, and that, on the basis of the estimated beam squint, estimates an optimal beam at a frequency other than a specific frequency used for estimating the beam squint; and a data transfer instruction unit that, during data transfer, instructs the data transfer using optimal beams corresponding to the frequencies respectively allocated to terminal devices, on the basis of the optimal beam for each frequency estimated by the beam squint estimation unit.　

The application belongs to the technical field of radar antenna, and aims at solving the problem of low detection efficiency of the current ground penetrating radar, and provides a phased array ground penetrating radar antenna array system design method and system for detecting a tunnel.The method comprises the following steps: constructing an eccentric function according to the beam scanning angle range of a linear phased array, combining Chebyshev inequality to form eccentric Chebyshev inequality, and then solving the antenna unit excitation weight according to the corresponding relationship between the eccentric Chebyshev inequality and the array directional pattern array factor, so as to adjust the power distribution of different antenna units and meet the requirements of the predetermined main lobe direction and the side lobe level; taking the side lobe gain level, the mutual reflection coefficient and the overall gain level of the array as the optimization target, the optimal spacing of each antenna unit is determined; and the detection strategy of the phased array ground penetrating radar antenna array system is designed, so that the underground target can be accurately and quickly positioned.

For example, an antenna array may include a plurality of antenna elements arranged according to an array arrangement configured to provide a predefined array factor including a main beam between a first angle and a second angle; a first Side- Lobe (SL) region between the first angle and a third angle including one or more first SL peaks below a predefined array factor value; a second SL region between the second angle and a fourth angle including one or more second SL peaks below the predefined array factor value; a third SL region between the third angle and a fifth angle including one or more third SL peaks above the predefined array factor value; and a fourth SL region between the fourth angle and a sixth angle including one or more fourth SL peaks above the predefined array factor value.

The application relates to the technical field of antennas and provides a beam forming modulation method and device applied to a bit reconfigurable leaky-wave antenna, which comprises the following steps: obtaining a target beam direction set and array parameters, and initializing the modulation state of a radiation unit; and cyclically executing the following iterative optimization process: randomly selecting any radiation unit, respectively calculating the current function value of a preset target function corresponding to any radiation unit under all available modulation states, and updating the modulation state of any radiation unit to the target state that makes the current function value maximum; and after a preset iteration end condition is met, outputting the optimized modulation state to control beam forming. Through the combination of an array factor model and random iterative optimization, the application realizes adaptive solution and accurate control of the optimal modulation state of the radiation unit of the bit reconfigurable leaky-wave antenna, does not need to depend on single bit quantization, is not limited to the physical period of the antenna, and can flexibly and efficiently support complex multi-beam synthesis.

The invention belongs to the technical field of radar antennas, and provides a phased array ground penetrating radar antenna array system design method and system for tunnel detection in order to solve the problem of low detection efficiency of an existing ground penetrating radar. The design method of the phased array ground penetrating radar antenna array system for detecting the tunnel comprises the following steps: constructing an eccentric function according to a beam scanning angle range of a linear phased array, and forming an eccentric Chebyshev inequality in combination with the Chebyshev inequality; according to the corresponding relation between the eccentric Chebyshev inequality and the array directional diagram array factor, the excitation weight of the antenna unit is solved, so that the power distribution of different antenna units is adjusted, and the requirements of the preset main lobe direction and the side lobe level are met; with the sidelobe gain level, the mutual reflection coefficient and the overall gain level of the array as optimization targets, the optimal spacing of each antenna unit is determined; a detection strategy of a phased array ground penetrating radar antenna array system is designed, and accurate and rapid positioning of an underground target is achieved.

The invention provides a substrate integrated dielectric resonator antenna array with multiple sidelobe suppression schemes, relates to the technical field of antenna wireless communication, and solves the technical problems that in the prior art, the application sidelobe suppression capability of a high-order mode technology is insufficient and incomplete, and an amplitude weighting or spacing optimization method is limited. According to the technical scheme, the method comprises the following steps of: accurately designing a unit interval to align an array factor grating lobe with a zero point of a unit directional diagram; the distance between the two gaps is regulated and controlled to control the zero point position of a unit directional diagram, and the radiation zero point depth is deepened by using a substrate integrated structure; amplitude weighting fed to each port is realized through thickness difference and position offset of impedance conversion lines of different ports of the feed network, and the sidelobe level of the array is inhibited; the triangular grooving structure improves the flexibility of impedance matching adjustment and port amplitude weighting. Cooperative sidelobe suppression is achieved, integrated manufacturing is achieved through the substrate integrated structure, and the overall performance and reliability of the array are remarkably improved while high gain is kept.