不同脉冲宽度下微波铁氧体材料临阈射频场的测量  

Threshold RF field measurement of microwave ferrite under different pulse width

作　　者：石成玉[1] SHI Cheng-yu(Southwest Institute of Applied Magnetics, Mianyang 621000, China)

机构地区：[1]西南应用磁学研究所,四川绵阳621000

出　　处：《磁性材料及器件》2016年第6期48-49,76,共3页Journal of Magnetic Materials and Devices

摘　　要：给出了采用平行泵激励方式,纯YIG和多种掺Gd石榴石结构微波铁氧体材料在脉冲宽度t_d分别为0.7、1.0、1.5和2.0μs时,临阈射频场h_(ct)的测量结果,通过外推计算出这些材料无限宽脉冲下的自旋波线宽ΔH_k。结果表明,微波铁氧体材料的高功率承受能力不仅与材料的自旋波线宽ΔH_k有关,还与h_(ct)外推直线的斜率及所在高功率微波信号的脉冲宽度t_d有密切的关系;在工程应用中,选择高功率微波铁氧体材料除了需考虑材料的自旋波线宽ΔH_k,还应充分了解材料在不同脉冲宽度下的临阈射频场h_(ct)。Threshold RF field hct of pure YIG and Gd-doped garnet microwave ferrite material was tested at pulse width of0.7,1.0,1.5and2.0μs using parallel pump driving,and by extrapolating spin wave lingwidth was calculated at infinite width pulse.It shows that,high power endurance depends strongly on not only spin wave lingwidth of the material but slope of hct extrapolating line and pulse width td of high power microwave signal.For engineering applications,both spin wave lingwidth of the material and threshold RF field hct at different pulse width should be took into account for choosing high power microwave ferrite materials.

关 键 词：微波铁氧体材料 高功率临阈场 自旋波线宽 脉冲宽度 

分 类 号：TM936.1[电气工程—电力电子与电力传动]