阵列馈源偏置抛物面天线合成高功率微波的研究

Generating high-power microwave with array feed offset paraboloid antenna

运用物理光学分析方法,对使用7单元的扇形喇叭一维阵列和角锥喇叭或圆锥喇叭三角形阵列喇叭束作为单偏置抛物面天线的馈源,空间合成高功率微波进行了比较研究,数值分析表明在阵元输入功率、口面最大场强、天线口径、净空间及天线边缘照度相同,且阵列馈源具有准轴对称主瓣条件下,扇形喇叭构成的一维阵列馈源与单偏置抛物面组成的天线系统的方向性系数和溢出效率优于采用角锥喇叭三角形阵列馈源或圆锥喇叭三角形阵列馈源的天线系统。若将喇叭束直接作为辐射天线使用,由于圆锥喇叭三角形阵列方向性系数对阵元间相位波动的稳定性较好,而更具优势。

For generating high power microwave in free space the physical optics is used to analyze offset paraboloid antennas with three types of 7 element array horn feeds: one dimension sectorial horn array, two dimension triangle pyramidal horn array and two dimension triangle circular horn array. On condition that the maximum electric fields on the aperture of all the horns are equal, the array feeds radiate axial symmetrical main lobe and the antennas are with same reflector diameter, clean space and edge taper, and the radiation characteristics of the antenna with sectorial horn array feed are the best of the three. However, the circular horn array has the most stable radiation directivity when the phase difference between the elements of the horn array is changed, the circular horn array is the best as a radiator antenna for combining high power microwave.