TE_(1n)/TM_(1n)激励圆锥喇叭辐射功率测量方法  

Radiation power measurement of conical horn antennas excited by TE_(1n)/TM_(1n) modes

作　　者：袁成卫[1] 彭升人[1] 张强[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2016年第8期64-68,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61401485)

摘　　要：研究了TE1n/TM1n模式激励的圆形口径喇叭天线的辐射场特征,导出了根据辐射场计算天线辐射总功率的方法:通过测定天线E面和H面的辐射场功率密度分布,分别进行球冠积分,其平均值即为天线的辐射总功率;并进行了数值仿真验证。分析了测量角度范围和测量点数目对测量功率的影响,提出了通过数据拟合来降低测量误差的一种方法;给出了测量角度范围和测量点数的选取原则,功率测量可在15dB或18dB波束宽度范围内进行,测量点数一般选15个左右。The radiation characters of conical horn antennas excited by TE1n/TM1 n modes are studied.Measuring the E-and H-plane power density patterns of a horn,one can get the horn＇s radiation power by respectively integrating the two patterns on the spherical surface and taking their average.The effects of the measuring points＇ range and number on the power calculations are discussed,and a data fitting method is presented to reduce the error caused by numbered measuring points.A principle to choose the range and number of the measuring points is given：the range may be 15dB-beamwidth or 18dB-beamwidth,and the number is about 15.

关 键 词：高功率微波 圆锥喇叭 功率测量 功率密度 

分 类 号：TN811[电子电信—信息与通信工程] TN814