Combined optimization method used for synthesis of large-scale heterogeneous four-dimensional antenna array

Abstract

The invention discloses a combined optimization method used for synthesizing a large-scale heterogeneous four-dimensional antenna array which employs a pulse phase shift sequence. According to the combined method, a part of convexity of an original synthesis problem is fully utilized, and the original complicated synthesis problem is divided into two sub-problems; and then optimization is performed by two steps: step 1, rapidly optimizing an equivalent excitation amplitude (switch switch-on duration) and a static excitation phase with high efficiency according to constraint of a field at a center frequency by employing a convex optimization algorithm; and step 2, optimizing a switch switch-on initial time with the combination of a subarray optimization technology by employing a differential evolution algorithm according to the requirement of a directional diagram by a sideband so that the whole optimization problem can be rapidly solved with high efficiency. According to the method, the biggest innovation is the discovery of the essential characteristic of the original optimization problem, optimization is performed with the combination of the convex optimization algorithm and the differential evolution algorithm, the speed and the efficiency of the whole optimization process are greatly increased, and the effect of getting double the result with half the effort is achieved.

Description

technical field [0001] The invention belongs to the technical field of antennas and relates to the synthesis of large-scale heterogeneous four-dimensional antenna arrays. Specifically, a joint optimization method is used to quickly and efficiently synthesize heterogeneous four-dimensional antenna arrays. The fast and high efficiency of this joint optimization algorithm is mainly reflected in the full use of the partial convexity of the problem, and the introduction of the convex optimization algorithm to the problem of large-scale heterogeneous four-dimensional antenna array synthesis. Background technique [0002] So far, the topological structures of antenna arrays are almost planar antenna arrays distributed only on the same plane or conformal antenna arrays distributed only on the same curved surface. For some special carriers, such as satellites, aircraft, ships, etc., due to the very limited surface space that can be arrayed by the carrier itself and other non-antenna ...

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Problems solved by technology

However, for large-scale four-dimensional array synthesis, it seems powerless, the convergence speed is very slow, the efficiency is extremely low, and it is even unfeasible.

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