CAJ | 학술논문

采用HP-8510B微波矢量网络分析仪测试了超细SiC、SiC晶须和纳米SiC的电磁参数,并对三者的电磁参数进行了比较,结果表明粒径较小的纳米SiC的电磁参数在大部分所测试频段上均高于其余二者.根据电磁波传输线理论计算了3种SiC吸收剂的反射率曲线,发现纳米SiC的吸波性能明显优于超细SiC和SiC晶须.纳米SiC吸收剂的吸收峰随着厚度的增加而增大,谐振频率随着厚度的增加而向低频转移.纳米SiC吸收剂在涂层厚度为5.0mm时,吸收峰值可达-8.45dB,谐振频率为7.12GHz,小于-5dB的频宽为1.8GHz.
채용HP-8510B미파시량망락분석의측시료초세SiC、SiC정수화납미SiC적전자삼수,병대삼자적전자삼수진행료비교,결과표명립경교소적납미SiC적전자삼수재대부분소측시빈단상균고우기여이자.근거전자파전수선이론계산료3충SiC흡수제적반사솔곡선,발현납미SiC적흡파성능명현우우초세SiC화SiC정수.납미SiC흡수제적흡수봉수착후도적증가이증대,해진빈솔수착후도적증가이향저빈전이.납미SiC흡수제재도층후도위5.0mm시,흡수봉치가체-8.45dB,해진빈솔위7.12GHz,소우-5dB적빈관위1.8GHz.
The electromagnetic parameters of ultra-fine SiC,SiC whisker and nanometer SiC are tested,the results show that the electromagnetic parameters of nanometer SiC is higher than the other two.Reflection curves of SiC absorbers calculated with electromagnetic wave transmission-line theory show that the microwave absorption properties of nanometer SiC absorber is better than ultra-fine SiC and SiC whisker.The minimum absorption of nanometer SiC absorber increases and the resonance frequency gradually moves to the low frequency range with the increase of the thickness of coating.When the thickness of coating is 5.0mm,the minimum absorption of nanometer SiC absorber can achieve-8.45dB at the resonance frequency of 7.12GHz,the frequencies range for absorption value less than-5dB is 1.8GHz.