摘要
本文用时间步进法求解线天线的时域积分方程,计算分析了直线振子和V形振子的时域辐射特性。分析了馈源位置、加载大小对振子输入电流及远区辐射场的影响。对V形振子的长度及张角等参数作了优化,找到了获得前向辐射场强最大瞬时冲击值的结构参数,结果可供此类天线的设计参考。
The time domain radiation characteristics of dipoles and V antennas are obtained by solving the time domain electric field integrodifferential equation with the time-stepping approach. The effects of positions of the feeding source, the amounts of distributed loading along the antennas and the lengths and angles of V antennas on the input urrents and far field radiation characteristics are analyzed. The results obtained show that the appropriats amounts of distributed loading will yield a far field waveform that exhibits a 'time limited' characted, that the deviation of the feeding source will reduce the maximum instant field intensities, and that in order to obtain the maximum instant field intensities in the certain direction, the optimum design for the parameters, such as length and angle, of V antennas is needed.
关键词
天线
V形振子
时域辐射
直线振子
Antenna
Transient field
Time domain radiation
Time stepping approach vibrator
