Sparse broadband optimization method for concentric annular array

Abstract

The invention discloses a sparse broadband optimization method for a concentric annular array, and the method comprises the steps: firstly, building a genetic algorithm population based on the concentric annular array for a circular aperture broadband array synthesis problem, and designing an optimization target corresponding to a plurality of frequency points; then, starting circulation, and normalizing a plurality of objective functions of population individuals on a hyperplane; further calculating a self-adaptive normalized crossover radius, dividing crossover sub-populations according to the self-adaptive normalized crossover radius, and respectively solving corresponding probabilities; and finally, combining the individuals generated by crossing with the parent, and performing non-dominated sorting based on the crowding distance to obtain a filial generation population; judging whether the maximum number of cycles is reached, if so, ending the algorithm, otherwise, re-starting the cycle. According to the method, multi-objective optimization is applied to broadband array sparse cloth, so that the convergence level of the algorithm is effectively improved, the peak side lobe of the sparse cloth array on a broadband is inhibited, and high-performance circular aperture broadband array synthesis can be realized.

Description

Technical field [0001] The present invention relates to the field of array integration, and more particularly to a width optimization method of a concentric circular array. Background technique [0002] In the fields of phased array radar, radio astronomy, etc., an array with broadband or ultra-wideband has a very broad actual application scenario; and the concentric circle is widely used because of its symmetry. With the expansion of the array, the uniformly-uniform excited thinbed arrays can greatly reduce the cost and complexity of the antenna system, and can achieve a comprehensive indicator of uniform array, so it is widely Research and Application. However, for the widening array with high broadband, how to design a chamferial position, and implement the directional map optimization of the wide frequency band is the difficulty of this class. [0003] The main idea of ​​the existing method is: First, through the design of the broadband array design, or the approximation of t...

AI Technical Summary

Problems solved by technology

These methods rely too much on design experience or mathematical approximation, or use a single index, and the existing multi-objective algorithm itself is difficult to achieve comprehensive optimization due to its high complexity and poor convergence when applied to broadband arrays.

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