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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。
In this paper, by using the conformal mapping and the dyadic Green’s function, a method for calculating the radiation pattern of an arbitrary tapered cut antenna is given. The proposed method is suitable for any smooth tapered cut slot and antenna with air- Are valid. First, the antenna is divided into four sections of transmission lines transverse to the electromagnetic mode, and the voltage on the small section is constant, so that the electric field distribution of forward traveling waves along the tapered slot lines is approximately obtained. Then, the far-field radiation pattern of the slotted field is calculated using the half-plane Green’s function and taking into account the terminal scattering effects. In this paper, the calculation of the linear and exponential tapered slot antenna radiation pattern and the relevant literature radiation patterns compared to obtain a good agreement between the two.