基于小孔天线设计的衍射研究

Diffraction Research Based on the Small Aperture Antenna Design

以小孔天线的衍射为背景,对夫琅禾费一般衍射积分公式进行了推导并给出了夫琅禾费积分的单次快速傅里叶变换的计算方法,对基本图形的衍射场进行计算,并推理出多边形多角星的计算思路。通过实验和Matlab模拟得到了实验结果和衍射现象的规律,衍射规律可以应用于小孔天线设计中的孔径研究。

With the diffraction of small aperture antennas considered as the background,the general diffraction integral formula of Fraunhofer is derived,and the calculation method of the single fast Fourier transform of Fraunhofer integral is provided.Then,the diffraction field of the basic graph is calculated,and the calculation idea of polygons and polygonal stars is deduced.Finally,the laws of diffraction phenomena and the results are obtained through experiments and Matlab simulation.The diffraction laws can be applied to the study of aperture in the design of small aperture antennas.