电路模拟吸波材料带宽拓展方法探索

电路模拟吸波材料有一定的频率选择特性,电磁波有效损耗的带宽通常比较窄,通过多层电路屏、掺杂电损耗介质、磁损耗介质层组合、磁电损耗组合的方法,对电路模拟结构吸波材料在2~18GHz区间电磁损耗带宽的拓展进行了初步探索。结果证明:四种方法都能够提高电路模拟吸波材料的有效吸波带宽,并能够不同程度地提高材料的吸波效率。多层电路屏、掺杂电损耗介质的多层电路屏、组合磁损耗介质层的多层电路屏、组合磁损耗介质层和电损耗介质的多层电路屏,其反射率≤-5dB的带宽较单层电路屏的1.2GHz分别增加了6.4、10.6、9.6、10.6GHz,最小反射率分别达到-8、-10、-12、-25dB。

Exploration of Bandwidth Development of Circuit Analog Absorbing Materials

Circuit analog absorbing material shows frequency selecting property, the frequency bandwidth of effective radar waves loss was usually narrow.Through multilayer circuit analog screen, doping electric loss medium,magnetic loss medium layer combination,magnetic and electric loss medium combination methods, the preliminary exploration of the circuit analog absorbing materials in 2-18 GHz sector electromagnetism loss band width development was carried out. The experiment proves that the a.m. four methods can all enhance the circuit analog structure to absorb radar wave frequency bandwidth effectively and can improve the absorbing efficiency. The width of lower than -5 dB spectrum of multilayer circuit analog screen, multilayer circuit analog screen with doping electric loss medium, multilayer circuit analog screen with magnetic loss medium layer, multilayer circuit analog screen with doping electric loss medium and magnetic loss medium layer is widened by 6.4 GHz, 11.8 GHz, 10.8 GHz, 11.8 GHz respectively relative to 1.2 GHz for single circuit analog screen. The minimal reflecting rates reaches -8 dB,-10 dB,-12 dB,-25 dB respectively.