论文部分内容阅读
采用高能球磨羰基铁粉添加偶联剂KH-560制备低频雷达波吸波材料,研究了不同球磨时间下获得的样品电磁参量变化规律,根据传输线理论模拟计算出吸波材料的反射损耗。结果表明:随球磨时间的增加,最大吸收峰向低频转移。球磨8 h后得到的吸波材料在膜厚为2.5 mm时,在2.3~3.0 GHz的S波段范围内,反射损耗RL<-15 dB;而在2.7 1GHz处反射损耗RL最低可达-34 dB。
Low frequency radar wave absorbing materials were prepared by adding high energy ball milling carbonyl iron powder with coupling agent KH-560. The variation of electromagnetic parameters of samples obtained under different ball milling time was studied. The reflection loss of absorbing materials was calculated according to transmission line theory. The results show that with the increase of milling time, the maximum absorption peak shifts to low frequency. After 8 h ball milling, the reflection loss RL <-15 dB in the S band range of 2.3 ~ 3.0 GHz at a film thickness of 2.5 mm, and the reflection loss RL of-2.7 dB at 2.7 GHz can reach as low as -34 dB .