本文用混合法——MM(矩量法)和GTD(几何绕射理论)相结合,分析位于有限接地平面或导体台阶上的同轴型底部加载天线。计算了天线的电流分布和输入阻抗,计算结果与实测值吻合较好。 In this paper, the hybrid method - MM (Moment Method) and GTD (Geometrical Diffraction Theory) are combined to analyze the coaxial bottom loading antenna located on a limited ground plane or conductor step. Calculated the antenna current distribution and input impedance, the calculated results agree well with the measured values.