Side-lobe suppression method for three-dimensional array antenna pattern based on improved MOPSO and convex optimization algorithm

Abstract

The invention discloses a side-lobe suppression method for a three-dimensional array antenna pattern based on an improved MOPSO and a convex optimization algorithm. Firstly, three-dimensional array antenna pattern synthesis is modeled and analyzed, and a basic mathematic model of the array antenna radiation pattern synthesis is given, and multi-objective functions of low side-lobe pattern synthesis under constraint conditions of an array radiation direction and first side-lobe suppression are constructed respectively; then, the maximal excitation of a polarization directivity coefficient is obtained by a Lagrange multiplier method and is added in the MOPSO algorithm as preference information, an initial population is generated in the vicinity of optimal solutions, and the model is solved by iterative calculation; a convex optimization model of the low side-lobe pattern synthesis is constructed, a convex optimization tool is utilized to solve the corresponding optimal solutions under different threshold constraints, then the three-dimensional array antenna pattern under the low side-lobe constraint is obtained, and therefore the purpose of side-lobe suppression is achieved. According to the side-lobe suppression method for the three-dimensional array antenna pattern based on the improved MOPSO and the convex optimization algorithm, the optimization performance of the algorithms is improved, and the side-lobe suppression problem of the three-dimensional array antenna pattern can be solved efficiently and quickly.

Description

technical field [0001] The invention belongs to the comprehensive research field of three-dimensional array antenna pattern, and in particular relates to a method for suppressing side lobe of three-dimensional array antenna pattern based on improved MOPSO and convex optimization algorithm. Background technique [0002] With the emergence of various advanced high-performance detection sensors, the battlefield environment faced by fighter jets is becoming more and more complex. The airborne radar antenna includes all radar antennas on the aircraft, and its performance directly determines the survivability of the aircraft in complex environments. With the deepening of research on three-dimensional array technology, more and more three-dimensional arrays are applied to airborne radars. The antenna elements are installed on the surface of the aircraft, so that the three-dimensional array antenna conforms to the surface of the aircraft without affecting the aerodynamic performance...

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Problems solved by technology

[0004] However, the synthesis of the pattern of the three-dimensional array antenna has requirements for the radiation direction, side lobe, and polarization of the array. It is a multi-objective optimization problem (Multi-objective Optimization Problem, MOP), and the orientation of the three-dimensional array elements is different. , the array factor and array element factor no longer satisfy the pattern product theorem, so the classic pattern synthesis algorithm cannot be used to solve

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