Array antenna designing method of polynomial and particle swarm mixing method

Abstract

The invention provides an array antenna designing method of a polynomial and particle swarm mixing method, and relates to a thinned array antenna. The array antenna designing method of the polynomial and particle swarm mixing method comprises the following steps: (1) setting parameters of an array antenna according to actual demands; (2) setting a control parameter of particle swarm optimization according to a parameter of the array antenna; (3) selecting an order n of a polynomial, and initializing a particle swarm; (4) solving position distribution of various array elements by using position vectors of particles; (5) calculating whether the particles meet a constraint condition or not according to a model constraint condition, namely calculating whether the particles are in a feasible region or not; (6) judging whether array element distribution shown by the particles is good or bad according to a fitness function and a penalty function, and updating the position vectors and speed vectors of the particles; (7) repeating the step (4), the step (5) and the step (6), and searching optimum of the various current particles and experienced global optimum of all the particles; and (8) carrying out iteration repeatedly, searching to obtain convergent optimal particles, substituting the position vectors of the optimal particles into an array element distribution polynomial, and solving the optimized array distribution.

Description

Technical field [0001] The invention relates to a sparse array antenna, in particular to an array antenna design method involving a polynomial and particle swarm hybrid method. Background technique [0002] The array antenna arrangement can be divided into uniform and non-uniform arrangements. An array composed of non-uniformly arranged array elements is called an unequal-distance array, and vice versa. The non-uniformly spaced array has the following advantages: 1) The same main lobe width as the uniformly spaced array, that is, when the aperture is similar, fewer antenna elements are required, which reduces the cost of the entire system; 2) By optimizing the array element position distribution, Equal amplitude feeding can achieve low sidelobe characteristics, simplifying the feeding system. [0003] Non-uniformly spaced arrays can be divided into sparse arrays and sparse arrays according to the arrangement of array elements. The sparse array is an array in which the positions o...

AI Technical Summary

Problems solved by technology

However, although these intelligent algorithms can search for the optimal solution in the global scope, the solution accuracy and solution speed are still not high, and they converge prematurely. When the number of array elements is large, the calculation amount will increase and occupy too much computer resources

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