Method for reducing number of array elements of large-scale spherical surface array

Abstract

The invention discloses a method for reducing the number of array elements of a large-scale spherical surface array, and aims to provide a method capable of obtaining electrical performance equivalentto that of a full array and remarkably reducing the total number of the array elements of a spherical surface antenna array. According to the technical scheme, the method comprises: establishing a coordinate system, and constructing an antenna subarray according to the rule of half-wavelength uniform arrangement of antenna units in the antenna subarray; dividing sub-arrays along the pitching direction and the azimuth direction of the coordinate system, and constructing an initial full array; establishing a spherical cylindrical array antenna array model based on large-spacing array element arrangement, and constructing a new antenna subarray with large-spacing array element arrangement; and then, setting an activation angle domain and different incoming wave directions according to the array element spacing, and calculating the synthetic gain of the antenna array under each array element interval. The total array synthetic gain of the antenna is compensated by reasonably reducing thecurvature of the spherical surface and increasing the diameter of the spherical surface to a proper value, and the gain value and the sidelobe characteristic similar to those of a full-array array areobtained while the number of the array elements is reduced.

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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