一种可控透波材料电磁性能分析

采用多次化学切换手段考察了一种可控透波材料在不同次数切换前后的透波性能、屏蔽性能、切换时间、表面形貌。结果表明:切换次数10次以内,6~18 GHz材料透波状态透波率随切换次数变化较小,透波态透波率均大于90%,但材料屏蔽状态屏蔽性能增强,屏蔽态反射率均大于44%,透波/屏蔽切换时间变长,屏蔽态到透波态切换时间均在10 s内,透波态到屏蔽态切换时间均在30 s内,表面有氯化铵生成。

Analysis of Electromagnetic Performance of Contrallable Wave-Transparent Materials

Repetitious chemic switchs were used to investigated the transmission performance, electromagnetic shielding performance, switch time,surface morphology of controllable wave-transparent materials before switch and after switch. The results show that at 6 GHz to 18 GHz frequency, the increase of switch degree has little effect on transmission performance(more than 90%)of materials at wave-transparent state, while electromagnetic shielding performance (more than 44%)of materials at shielding state is enhanced, switch time of wave-transparence/ shield is prolonged,the time of switch from stealth to wave-transparence is less than 10 s, the time of switch from wave-transparence to stealth is less than 30 s and the ammonium chloride appears on surface of materials,when the switch times are below ten.