基于虚拟阵叠加原理的阵列抗干扰方法研究

提出了一种基于虚拟阵叠加原理的阵列抗干扰方法。将相控阵列分解成一个主阵列和 N 个虚拟阵列，主阵列采用 Taylor 幅度加权实现低旁瓣电平，并通过相位控制使主波束对准来波方向。虚拟阵列也采用 Taylor 加权，并在主阵列旁瓣上产生 N 个零点，实现阵列的旁瓣对消， 虚拟阵的低旁瓣将减少对阵列主波束的影响，虚拟阵加权后与主阵列叠加最终得到整个阵列抗干扰的幅相权值。文中使用该方法对一个 24 元直线阵进行抗 3 个干扰的设计验证，在 3 个干扰方向实现了小于-100dB 的零点，证实了该方法的有效性。

Array Anti-interference Method Based on Virtual Array Superposition Principle

An array anti-interference method based on virtual array superposition principle is proposed in this paper. A phased array is decomposed into a main array and n virtual arrays. The low side-lobe level of the main array is achieved by using Taylor amplitude weights and the main beam is aligned to the direction of the incoming wave by adjusting corresponding phase. The virtual arrays also use Taylor amplitude weights and generate N nulls on the side-lobe of the main array. The side-lobe cancellation in the array will be realized using the method and the virtual arrays with low side-lobe levels have a small impact on the main beam of the array. The weights of the complete array are obtained by superimposing the main array and the virtual arrays. In order to validate the proposed method, a 24-elements uniform linear array with three interferences is analyzed. The three nulls are imposed to the interference directions and the null depth levels are less than -100 dB, which show that the proposed method is effective.