密排圆柱基阵基元振幅和相位特性

AMPLITUDE AND PHASE CHARACTERISTICS OF ELEMENTS ON A CLOSELY PLACED CYLINDRICAL ARRAY

摘要: 具有机械输入阻抗Z¹的基元,密布在无限长的圆柱基阵上。这些基元能被看作是圆柱阵的阻抗障板,在该边界值条件下求解波动方程,我们就得到入射平面波散射场的解。
文中给出了计算一个基元的水平方向性的理论公式,也就是基元沿着圆周方向的振幅和相位的分布。对波束形成中的相幅权,可按此情况下的基元相幅特性加以修正。
最后,文中还扼要地说明了基元的机械输入阻抗Z¹对基元方向性的影响。

Abstract: Elements with mechanica inputinipedance Z¹ are closely placed on an infinite long cylindrical array. These elements can be cosidered as impedance baffle of the cylindrical array. Under Conditions of the boundary, we solve the wave equation and then get the scattering field of incident plane wave.
This paper gives a theoretical formula to calculate horizontal directivity of an element on the array. Effects of mechanical impedance Z¹ on horizontal directivity of an element is also related.