摘要
超远距离探测雷达主要使用了P波段雷达波,铁氧体、金属微粉等传统吸波材料对P波段雷达波的吸收效果不理想。基于有效媒质理论,制备了镍锌铁氧体与铁粉的复合材料作为吸波材料,提升P波段电磁波的吸波效果,并分析讨论了镍锌铁氧体与铁粉不同配比对复合材料在P波段的电磁参数及吸波性能的影响。结果表明:随着铁粉含量增加,复合材料的介电常数逐渐增大,磁导率逐渐降低;当铁粉的质量分数为20%,厚度为10mm,所制得的复合材料的吸波性能最好,其在700~880M Hz反射损耗小于-20 d B。镍锌铁氧体与铁粉的复合材料体现了对P波段电磁波吸收和屏蔽作用的潜力。
P band radar wave is mainly used to detect ultra long range radar,and the absorption effect of traditional absorbing materials,such as ferrite and metal powder,is not ideal on P band radar wave. In this study,based on the effective medium theory,Ni-Zn ferrite was prepared,and then mixed with ferrous powder as composite absorbing materials,to enhance absorption properties of the P band electromagnetic wave absorption materials. The study analyzes and discusses the effect of electromagnetic and absorption properties of composite materials of Ni-Zn ferrite and ferrous powder mixed with different proportions in P band. The result reveals that dielectric constant of composite materials increases and the permeability of composite materials decreases with the content of ferrous powder increasing. When the mass fraction of ferrous powder is 20% and the thickness of prepared sample is 10 mm,the absorption property of the composite materials is the best,and its reflection loss is less than-20 d B in 700-880 MHz band. The composite material of nickel zinc ferrite and ferrous powder show s potential for electromagnetic wave absorption and shielding application on P band.
作者
庞超
梁迪飞
陈慧
李维佳
刘天民
PANG Chao;LIANG Difei;CHEN Hui;LI Weijia;LIU Tianming(National Engineering Research Center of Electromagnetic Radiation Control Materials,School of Electronic Science and engineering,University of Electronic Science and Technology of China,Chengdu 610000,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2018年第7期75-78,共4页
Electronic Components And Materials
关键词
P波段
镍锌铁氧体
铁粉
复合材料
电磁参数
电磁吸收
P band
Ni-Zn ferrite
ferrous powder
composite materials
electromagnetic parameters
electromagnetic absorption
