采用改进的标准场地法测量LPDA  

Measuring LPDA with a Modified Standard Site Method

作　　者：孟东林[1] 

机构地区：[1]中国计量科学研究院

出　　处：《安全与电磁兼容》2012年第6期29-32,共4页Safety & EMC

摘　　要：采用改进的标准场地法针对LPDA和复合天线分别进行了测试和比较分析。分析了采用ANSI C63.5:2006测量对数周期天线LPDA和复合天线的自由空间天线系数Fa时,由相位中心引起的误差;对CISPR 16-1-6(CDV)中的计算公式进行了改进,使得即使配对中的天线结构不相同也可以进行比较准确的测量;然后分别针对LPDA和复合天线进行了试验,并与使用CISPR 16-1-6(CDV)中垂直方法的测量结果进行了比较。结果表明:在200 MHz～2 GHz范围内大部分频段小于0.6 dB,首末频点差别小于0.9 dB。为了便于工程应用,还提供了背景噪声的抑制措施、电缆的选用原则等。A modified standard site method have been proposed to measure the free space antenna factors of log-periodic dipole antenna （LPDA） and hybrid antenna, based on the theory stated in CISPR 16-1-6 （CDV）. The modified SSM does not require the geometry of the paired antennas to be the same. The measured results for a LPDA antenna are in close agreement （less than 0.6 dB in most frequencies and largest errors less than 0.9 dB） with that with the vertically polarized method in CISPR 16-1-6 （CDV）. Some other improvement methods have been provided for reducing the errors from the ambient noise, and cable loss due to temperature changes.

关 键 词：天线系数 对数周期天线 天线测量 电磁兼容 

分 类 号：TN820[电子电信—信息与通信工程]