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本文采用一种振子型合成元作为阵元组成圆阵天线,通过一组加权,可控制阵中所有的元方向图型都指向预先任意规定的相控方向。这在“全向”范围内,任何方向都能形成强定向波束,以有效地获取有用信号。在此基础上,本文通过引入等效干扰源的概念,把Gabriel的各向同性元自适应直线阵理论扩展应用到有向元圆阵,对单元方向可控自适应圆阵专题进行了研究。它包括:阵远区辐射图型;单元方向可控圆阵系统输入协方差矩阵的导出;单元方向可控自适应圆阵辐射图型正交分解;阵系统输出噪声瞬态特性公式。
In this paper, a vibrator-type composite element is used as the array element to form a circular array antenna. Through a set of weights, all the element patterns in the controllable array point to pre-defined phased directions. This creates a strong directional beam in any direction within the “omnidirectional” range to effectively obtain useful signals. On this basis, by introducing the concept of equivalent sources of interference, this paper applies Gabriel’s isotropic element adaptive linear theory to the directed circular array and studies the controllable circular array with unit direction. It includes: the radiation pattern of the far-field array; the derivation of the input covariance matrix of the unit direction controllable circular array system; the orthonormal decomposition of the array direction controllable circular array radiation pattern; and the formula of the output system transient noise characteristics.