特种电磁材料对非核电磁脉冲的屏蔽效能测试
Shielding effectiveness testing of a special electromagnetic material to non-nuclear electromagnetic pulse
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摘要: 采用了窄带和超宽谱高功率微波源，在微波暗室和开阔试验场地中建立了多个典型波段的微波辐射场；并利用辐射场测量系统，对多种测试样片和屏蔽室模型试验样片的屏蔽效能进行了试验。结果表明：当测试窗样片厚度(屏蔽室模型试验样片壁厚)大于30 mm时，对窄带高功率微波的屏蔽效能可达到80 dB以上，对超宽谱高功率微波的屏蔽效能可达到50 dB以上。该特种电磁材料可广泛应用于三级屏蔽要求的工程中，当周围的电磁环境以窄带微波为主时，可谨慎应用于屏蔽要求较高的防护工程中。Abstract: In an anechoic chamber and an open area test site, using several narrow-band and ultra-wide spectrum high power microwave sources and measurement systems of radiating field, the shielding effectiveness of a special electromagnetic material to non-nuclear electromagnetic pulse was studied experimently. For the technically designed samples of testing window and shielding-enclosure models, when the thickness of the window samples (or the wall of the model) is greater than 30 mm, the shielding effectiveness to narrowband high power microwave can exceed 80 dB and to ultra-wide spectrum high power microwave, 50 dB. The material can be widely applied to class Ⅲ fortified structures. It can be cautiously applied to class Ⅱ or Ⅰ fortified structures when the electromagnetic.
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