Method for Reducing the Number of Large-Scale Sphero-Cylindrical Arrays

Abstract

The invention discloses a method for reducing the number of elements of a large-scale sphero-cylindrical array, aiming to provide a method that can obtain electrical performance equivalent to that of a full array and can significantly reduce the total number of elements of a sphero-cylindrical antenna array. The invention is realized through the following technical solutions: establish a coordinate system, and construct the antenna sub-array according to the rule that the antenna units in the antenna sub-array are uniformly arranged at half wavelength. Divide sub-arrays along the pitch and azimuth directions of the coordinate system to construct an initial full array; establish a spherical cylindrical array antenna array model based on the arrangement of large-pitch array elements, and construct a new antenna sub-array with large-pitch array elements; Then, according to the activation angle domain set by the array element spacing and different incoming wave directions, the composite gain of the antenna array under each array element spacing is calculated, and the spherical cylinder diameter is increased to a suitable value by reasonably reducing the curvature of the spherical cylinder To compensate the total array synthesis gain of the antenna, while the number of array elements is reduced, the gain value and sidelobe characteristics similar to the full array array are obtained.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a method for reducing the number of elements of a spherical cylindrical array based on the arrangement of large-scale array elements, which is suitable for reducing the number of elements in a uniformly distributed spherical antenna array with large-scale array elements. , the number of channels of the array and the cost of the array can be significantly reduced through this technology. Background technique [0002] In a modern radar system, the antenna array plays a very important role in the whole system as the receiving and transmitting end of the signal. However, in many occasions, it is necessary to optimize the position of each array element of the antenna array to obtain lower sidelobe levels and better array gain while reducing the number of array elements. However, the performance optimization of antenna array is a multi-variable nonlinear optimization prob...

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Problems solved by technology

[0006] The present invention aims at realizing the low-cost optimization design of the sphero-cylindrical conformal array for the existing large-scale sphero-cylindrical array, and provides a simple-designed, low-cost , easy to operate, the performance of the array does not decrease, the electrical performance equivalent to that of a full array can be obtained, the total number of elements of the spherical cylindrical antenna array can be significantly reduced, and the array element reduction technology of the low-cost optimized design of the spherical cylindrical antenna array is realized

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