A miniaturized power density measurement system for high-power microwave radiation field
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摘要: 为解决现有高功率微波辐射场功率密度测量系统测量环节多、系统复杂以及长电缆无法适应复杂电磁环境测量等问题，研制了一款小型化、一体化辐射场功率密度测量系统。系统采用天线-耦合器-转换器作为接收前端，后端采用同轴信号处理单元，在屏蔽箱内完成信号衰减、功率探测及电光转换，可实现系统远程测量与监控，可用于连续波、单次脉冲、连续脉冲辐射场功率密度测量。同时，系统采用模块化校准，可有效降低测量系统不确定度。该系统具备30 dB动态，最小可测脉宽50 ns，可测辐射场功率密度100 MW/m2，系统结构紧凑，简便易携，采用光纤传输，抗电磁辐射，可实现X波段GW级高功率微波辐射场功率密度快速测量。Abstract: To solve the problems of the existing HPM radiation field power density measurement system, such as many measurement links, system complexity and long cable which can’t adapt to complex electromagnetic environment measurement, a miniaturized and integrated power density measurement system of high-power microwave radiation field is developed. An antenna-coupler-adapter is used as the front receiver, the back end of the system is a coaxial signal processing unit, where the attenuation, power detection and electro-optical conversion are achieved in the shield box, hence, the system can be measured and monitored remotely. Meanwhile, modular calibration is applied in the system, which can effectively reduce the measurement uncertainty. The system has 30 dB dynamics, a minimum measurable pulse width of 50 ns and a measurable radiation field power density of 100 MW/m2. It is compact, easy to carry, anti-electromagnetic radiation, and capable of quick power density measurement of GW high-power microwave radiation field in X-band.
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Key words:
- radiation field /
- power density /
- high-power microwave /
- miniaturization /
- integration
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图 1 高功率微波辐射场功率密度测试系统框图
Figure 1. Structure diagram of high-power microwave radiation field measurement system
图 8 GW级高功率微波测试现场及测量曲线
Figure 8. System and measurements of GW high power microwave test
表 1 系统功率预估
Table 1. Estimation of system power
frequency/
GHzpower density/
(MW/m2)gain of
antenna/dBeffective area of
antenna /cm2output power of
antenna/dBmcoupling factor of
coupler /dBoutput power of
coupler/dBm8.2 100 15.7 39.8 86.0 40 46.0 10 100 17.4 39.8 86.0 40 46.0 12.4 100 19.4 40.5 86.1 40 46.1 
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