空气-介质任意锥削开槽天线辐射方向图的计算

空气-介质任意锥削开槽天线辐射方向图的计算 RADIATION PATTERN CALCULATION OF THE AIR DIELECTRIC ARBITRARILY TAPERED SLOT ANTENNA 黄景熙 Huang Jingxi Fan Zhibo Hu Jiayuan 1 first-author 范治波 1 胡家沅 1 武汉大学空间物理与电子信息学系 武汉大学空间物理与电子信息学系 Department of Space Physics and Electronic Information,Wuhan University Department of Space Physics and Electronic Information,Wuhan University 本文利用保角变换和并矢格林函效技术,给出了一种计算任意锥削开槽天线的辐射方向图的方法,所给的方法对于任意光滑锥削开槽和具有空气一介质的天线都是有效的。首先,将天线分成Ⅳ段横截电磁模式的传输线,并设在此小段上电压为常数,从而近似获得沿锥削开槽线上前向行波的电场分布。然后,利用半平面格林函数并考虑到终端散射效应从而计算开槽场的远场辐射方向图。本文给出的线性和指数锥削开槽天线的计算方向图与有关文献测量的辐射方向图相比较,两者之间获得了很好的一致性。 This paper presents a method for calculating the radiation patterns of arbitrarily tapered slot anten- has by using the conformal mapping technique and the dyatic Green’s function technique.The method presented is valid for the antennas with any smoothly tapered slot and with air dielectric.First,the electric field distribution of a forward traveling wave along the tapered slot is approximately obtained by dividing the antenna into N transverse electromagnetic mode transimission lines and by using the constant voltage criterion.Then,the far-zone field radiated from the slot field is calculated by employ- ing the half-plane Green’s frnction to account for terminatin scattering effect.The calculated radiation patterns of linearly and exponentially tapered slot antennas are presented and compared with the mea- tared radiation patterns in the literature.Agreement between the two is found to be quite good. 开槽天线 并矢格标函数 辐射方向图 slot antenna dyadic Green frnction radiation pattern TN454 1992-04-01 2021-04-01 4