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15 dB或18 dB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/TM1n 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 15 dB-beamwidth or 18 dB-beamwidth, and the number is about 15.