针对舰船RCS测试的定标问题，讨论从接收机前端注入标准微波信号或从发射机耦合发射功率输入接收机前端的2种内定标方法，作为修正外场定标的依据。根据雷达方程分析外场定标RCS测量设备、标准体加工、目标跟踪定位、测试区域环境等主要误差因素。讨论发射功率、系统非线性、系统稳定性、极化损耗等引入的误差，提出外场定标对标准体几何尺寸、表面光洁度以及所需信噪比等要求。通过内定标与外定标相结合的方法，解决由于定标与测试间隔时间过长接收机状态出现漂移导致测试误差的问题，保障舰船RCS长时间测试的精度和稳定度。
This paper is aimed at the problem of ship RCS test calibration, discussed from the front end of the receiver injection standard microwave signal or form a transmitter coupled emission power input receiver two calibration principle and method, as a basis for the correction of external field calibration. According to the radar equation, the main error factors are analyzed, such as external calibration RCS test equipment、standard body processing、target tracking and positioning、test area environment and so on. The error of transmission power、system nonlinearity、system stability、polarization loss and so on are discussed. The standard size、surface finish、and the required signal to noise ratio of the external field calibration are proposed. Through the method of internal calibration and external calibration combination, solve the problem of test error caused by the deviation of the state of the receiver in the time of calibration and test, the accuracy and migration of the RCS long time test are guaranteed.
2016,38(11): 125-128 收稿日期：2016-07-06
DOI：10.3404/j.issn.1672-7619.2016.11.026
分类号：TN957.51
作者简介：李永新(1962-),男,高级工程师,研究方向为目标电磁散射特性测量与建模。
参考文献：
[1] 黄培康, 殷红成, 许小剑. 雷达目标特性[M]. 北京: 电子工业出版社, 2005: 112-114.
[2] 黄培康. 雷达目标特征信号[M]. 北京: 宇航出版社, 1993: 223-239.
[3] 何国瑜, 卢才成, 洪家才, 等. 电磁散射的计算和测量[M]. 北京: 北京航空航天大学出版社, 2006: 244-245.
[4] WELSH B M, LINK J N. Accuracy criteria for radar cross section measurements of targets consisting of multiple independent scatterers[J]. IEEE Transactions on Antennas and Propagation, 1988, 36(11): 1587-1592.
[5] SKOLNIK M I. 雷达手册[M]. 南京电子技术研究所, 译. 北京: 电子工业出版社, 2010: 544-545, 566-567.
[6] 庄钊文, 袁乃昌, 等. 雷达散射截面测量: 紧凑场理论与技术[M]. 长沙: 国防科技大学出版社, 2000: 7-8.
[7] 航天工业总公司. 目标雷达散射截面数据格式要求: GJB 3830-1999[S]. 北京: 航天工业总公司, 1999.
[8] LANK G W. Radar measurement accuracy for fluctuating targets[J]. IEEE Transactions on Aerospace and Electronic Systems, 1991, 27(6): 868-870.
[9] 国防科学技术工业委员会综合计划部. 测量不确定度的表示及评定: GJB 3756-99[S]. 北京: 中国人民解放军总装备部, 1999.
