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针对赋形反射面天线优化设计耗时长的问题,提出了一种快速有效的分析赋形反射面天线远场的计算方法,并计算了赋形反射面天线的远场方向图。将远场积分公式中对赋形反射面的积分转换为对投影面上单位圆域的积分,再运用二维梯形-复化Gauss积分将积分公式转换为数值相乘累加求和的形式,并给出了详细的计算公式。对C波段和X波段不同大小圆形口径赋形反射面天线远场进行分析,文中方法计算结果与直接积分法、Gordon积分法计算结果相吻合,计算效率得到显著改善,该方法的有效性得到验证。
Aiming at the problem of long time-consuming optimization design of reflective reflector antenna, a fast and effective method to calculate the far-field of the reflector antenna is proposed. The far-field radiation pattern of the reflector antenna is calculated. In the far-field integral formula, the integral of the shaped reflecting surface is converted into the integral of the unit circular domain on the projection surface, and the integral formula is converted into the form of numerical summation and summation by using two-dimensional trapezoidal-complex Gauss integral Given a detailed calculation formula. The far-field of C-band and X-band circular aperture shaped reflector antennas with different sizes are analyzed. The calculation results in this paper are in good agreement with the direct integral method and the Gordon integral method, and the computational efficiency is significantly improved. The validity of this method verification.