摘要
采用矩量法计算线天线的电流分布和输入阻抗,根据电流分布,采用了在原有天线的目标位置放置测试偶极子的方法来计算线天线周围任意点的场强,并以7.5 MHz,长度为10 m,发射功率为1 kW的舰船单鞭天线为例,求解线天线的近场和远场.采用Matlab编程,计算得出了不同位置的方向图以及场强变化曲线,根据文献数据对比得到了安全距离范围.结果表明,该方法能够计算线天线中任意一点的场强,是处理天线近区场强以及电磁兼容问题的一种很好的方法.
This paper takes the method of momen to calculate the wire antenna＇s current distribution and input impedance.According to the current distribution,makes a proposal that the test dipole at the original spot of the antenna could be placed to calculate field strength of the wire antenna.And takes the Single-whip antenna which is 7.5 MHz,10 m in length,whose transmitting power is 1kW as an example to calculate the near-field and far-field of the antenna.Also this paper gets the pattern of different positions and field strength curve by using Matlab.According to historical data,gets a safe distance.As the result shows,the method could calculate the field strength of Arbitrary point of the wire antenna.It＇s a really good method of dealing with the problem that is concerned with field strength and electromagnetic compatibility.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2010年第5期573-576,共4页
Journal of Harbin University of Commerce：Natural Sciences Edition
关键词
线天线
矩量法
近场
单鞭天线
wire antenna
method of momen
near field
single-whip antenna
