圆阵的水平方向性

本文给出了阵元具有任意指向性的圆阵水平方向性函数的计算公式。对单面辐射阵元组成的圆阵进行了深入的讨论,给出了各种参数对阵方向性影响的规律性。对点元组成的圆阵,本文得出如下规律:使用奇数个阵元比用偶数个阵元更易于得到均匀的方向性;阵半径和波数的乘积接近零阶贝塞尔函数的零点,方向性的不均匀度明显增加,而且阵的接收灵敏度（或发射响应）显著降低。

HORIZONTAL DIRECTIVITY OF CIRCULAR ARRAY

A formula of the horizontal directivity of the circular array which is consisted of elements with arbitrary directivity was derived.
The diretivity patterns of circular array which is consisted of elements without back radiation such as the compound bar was disussed in detail. The effect of various paramen-ters on directivity was given.
For the circular array consisted of the point elements, the following conclusions were obtained:the circular pattern was obtained more easily using odd number of elements than using even number of elements; when the product of the radius of array and the wave number approches to the zero point of zero order Bessel function, the fluctuation of the directivity pattern increases significantly and the transmitting sensitivity or the receiving sensitivity of the array decreases significantly.