基于电场探头的雷达强脉冲场时域快速测量
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摘要
雷达强脉冲场的准确测量对研究电磁环境特征和装备电磁安全性具有重要意义。雷达强脉冲场常用频域测量方法耗时,且测量结果与分辨率带宽设置相关,设置不当会造成错误结果。为此文章在分析脉冲信号的时频域特征,并结合时域测量法和场强探头法测量原理研究的基础上,提出了基于示波器和场强探头的强脉冲场峰值和平均值场强快速测量方法,解决了大功率雷达脉冲近场分布快速测量的难题,同时给出了组合测量方法中场强探头的适用边界条件,实验验证结果表明场强探头与示波器组合法测量误差小于1dB,且可相互验证。
The accurate measurement of radar high pulse field is of great significance to the study of the characteristics of electromagnetic environment and electromagnetic safety of the equipment. For radar high pulse field, the typical used frequency-domain measurement method is time-consuming, and the measurement results are related to the resolution bandwidth setting. The inappropriate setting may lead to wrong results. Based on the analysis of the time-frequency characteristic of pulse signal and the research on the measuring principle of oscilloscope and field intensity probe, this paper puts forward a fast measuring method of peak and average field intensity based on oscilloscope and field intensity probe. The problem of fast measurement of high power radar pulse near field distribution is solved, and the boundary conditions of field intensity probe in the combined measurement method are given. The experimental results show that the error of the combined measurement method of field intensity probe and oscilloscope is less than 1 dB and can be verified mutually.
The accurate measurement of radar high pulse field is of great significance to the study of the characteristics of electromagnetic environment and electromagnetic safety of the equipment. For radar high pulse field, the typical used frequency-domain measurement method is time-consuming, and the measurement results are related to the resolution bandwidth setting. The inappropriate setting may lead to wrong results. Based on the analysis of the time-frequency characteristic of pulse signal and the research on the measuring principle of oscilloscope and field intensity probe, this paper puts forward a fast measuring method of peak and average field intensity based on oscilloscope and field intensity probe. The problem of fast measurement of high power radar pulse near field distribution is solved, and the boundary conditions of field intensity probe in the combined measurement method are given. The experimental results show that the error of the combined measurement method of field intensity probe and oscilloscope is less than 1 dB and can be verified mutually.
引文
[1] 张怀坤, 苑红晓, 娄世平. 微波站电磁环境测试与分析[J].微波学报, 2010, 26(S1) : 595-597 Zhang H K, Yuan H X, Lou S P. Test and analysis of electromagetic environment around microwave station[J]. Journal of Microwaves, 2010,26 (S1) : 595-597
[2] IEEE Std C95.3-2002. IEEE recommended practice for measurements and computations of radio frequency electromagnetic fields with respect to human exposure to such fields, 100kHz-300GHz[S]. New York: IEEE, 2002
[3] 金祖升, 李建轩, 施佳林,等. 高功率微波照射下阿基米德螺旋天线响应特性研究[J]. 微波学报, 2016, 33 (2) : 1-5 Jin Z S, Li J X, Shi J L, et al. Thermal effects of two typical antennas under the irradiation of the high power microwave[J]. Journal of Microwaves, 2016 , 33 (2) : 1-5
[4] 中国人民解放军总装备部. GJB 5313.电磁辐射暴露限值和测量方法[S]. 北京:总装备部军标出版发行部,2004 The General Armament Department of PLA.GJB5313 The exposure limits and measurement methods of electromagnetic radiation[S].Beijing:GAD Military Standard Publishing Department,2004
[5] Tang S P, Cai M J, Li J X. Research on strong pulsed electromagnetic field test method by time-frequency combination[J]. High Voltage Engineering, 2013, 39(10) : 2471-2476
[6] 郑君里, 应启珩, 杨为理. 信号与系统(第二版)[M]. 北京:高等教育出版社, 2000 Zheng J L, Ying Q X, Yang W L. Signals and systems(2nd edition) [M]. Beijing: Higher Education Press, 2000
[7] Paris D T, Leach W M, Joy E B. Basic theory of probe-compensated near field measurement[J]. IEEE Transactions on Antennas and Propagation,1978, 26(3):373-379
[8] Randa J, Kanda M, Orr R D. Thermo optic designs for electromagnetic-field probes for microwaves and millimeter waves[J]. IEEE Transactions on EMC, 1991, 33:205- 214
[9] 同济大学数学教研室. 高等数学(第四版)[M]. 北京:高等教育出版社, 1996 Mathematics Teaching and Reasearch Room of Tongji University. Higher mathematics (4th edition)[M]. Beijing:Higher Education Press, 1996
[10] 周忠元, 陈贝贝. 脉冲调制辐射场的场强测量[J]. 东南大学学报(自然科学版), 2016 46(6): 1186-1191 Zhou Z Y, Chen B B. Measurement of pulse modulated radiation field strength[J]. Journal of Southeast University (Natural Science), 2016 ,46(6 ): 1186-1191
[11] 孙常磊.1MHz-18GHz超宽带电场探头分析[D]. 西安:西安电子科技大学, 2008 Sun C L. The analysis of the 1MHz-18GHz ultra wide-band E-field probe[D]. Xi’an: Xidian University, 2008李建轩男,1980年生,博士,高级工程师。主要研究方向:舰船电磁兼容计算、仿真和测试理论与技术。E-mail:ljx0500507@163.com。
[2] IEEE Std C95.3-2002. IEEE recommended practice for measurements and computations of radio frequency electromagnetic fields with respect to human exposure to such fields, 100kHz-300GHz[S]. New York: IEEE, 2002
[3] 金祖升, 李建轩, 施佳林,等. 高功率微波照射下阿基米德螺旋天线响应特性研究[J]. 微波学报, 2016, 33 (2) : 1-5 Jin Z S, Li J X, Shi J L, et al. Thermal effects of two typical antennas under the irradiation of the high power microwave[J]. Journal of Microwaves, 2016 , 33 (2) : 1-5
[4] 中国人民解放军总装备部. GJB 5313.电磁辐射暴露限值和测量方法[S]. 北京:总装备部军标出版发行部,2004 The General Armament Department of PLA.GJB5313 The exposure limits and measurement methods of electromagnetic radiation[S].Beijing:GAD Military Standard Publishing Department,2004
[5] Tang S P, Cai M J, Li J X. Research on strong pulsed electromagnetic field test method by time-frequency combination[J]. High Voltage Engineering, 2013, 39(10) : 2471-2476
[6] 郑君里, 应启珩, 杨为理. 信号与系统(第二版)[M]. 北京:高等教育出版社, 2000 Zheng J L, Ying Q X, Yang W L. Signals and systems(2nd edition) [M]. Beijing: Higher Education Press, 2000
[7] Paris D T, Leach W M, Joy E B. Basic theory of probe-compensated near field measurement[J]. IEEE Transactions on Antennas and Propagation,1978, 26(3):373-379
[8] Randa J, Kanda M, Orr R D. Thermo optic designs for electromagnetic-field probes for microwaves and millimeter waves[J]. IEEE Transactions on EMC, 1991, 33:205- 214
[9] 同济大学数学教研室. 高等数学(第四版)[M]. 北京:高等教育出版社, 1996 Mathematics Teaching and Reasearch Room of Tongji University. Higher mathematics (4th edition)[M]. Beijing:Higher Education Press, 1996
[10] 周忠元, 陈贝贝. 脉冲调制辐射场的场强测量[J]. 东南大学学报(自然科学版), 2016 46(6): 1186-1191 Zhou Z Y, Chen B B. Measurement of pulse modulated radiation field strength[J]. Journal of Southeast University (Natural Science), 2016 ,46(6 ): 1186-1191
[11] 孙常磊.1MHz-18GHz超宽带电场探头分析[D]. 西安:西安电子科技大学, 2008 Sun C L. The analysis of the 1MHz-18GHz ultra wide-band E-field probe[D]. Xi’an: Xidian University, 2008李建轩男,1980年生,博士,高级工程师。主要研究方向:舰船电磁兼容计算、仿真和测试理论与技术。E-mail:ljx0500507@163.com。