摘要
目的将海水作为一种电磁屏蔽材料,研究其电磁屏蔽效能以及影响因素。方法基于海水和玻璃的电磁特性参数,并利用电场和磁场切向分量连续边界条件,推导由双层玻璃封装海水所构成的复合电磁屏蔽体结构的屏蔽效能计算公式。结果具有一定厚度和盐度的海水墙体可以展示出良好的电磁屏蔽效能。通过增加海水层的厚度,提高海水的盐度以及温度,均可以有效增强海水电磁屏蔽体的屏蔽效能。改变封装海水的玻璃层厚度,对海水电磁屏蔽体的屏蔽效能影响较小。结论海水可以作为一种有效的电磁屏蔽材料,并具有光波透明、电磁屏蔽效能易重构、可循环导热等独特的优势。在军事和民用领域,海水电磁屏蔽体将具有重要的理论和应用价值。
Objective To investigate the shielding effectiveness of the seawater and its affecting factors where seawater is used as electromagnetic shielding material. Methods Formulas for calculating the shielding effectiveness of composite electromagnetic shielding structure made up of a seawater layer sandwiched by double glazing glass were derived with electromagnetic property parameters of sea water and glass and electromagnetic boundary condition that tangential fields be continuous. Results The seawater electromagnetic shielding wall with enough salinity and thickness had good shielding effectiveness. The shielding effectiveness could be enhanced by increasing the thickness, salty and temperature of the seawater layer, while it was not sensitive to the glass thickness. Conclusion Seawater can be used as effective electromagnetic shielding material. It has advantages of optical transparency, shielding effectiveness reconfiguration, cycle control of heat conduction. It has theoretical and application value in military and civilian areas.
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