鱼刺型微带铁氧体环行器的频率特性  

Frequency characteristic of fish-bone type microstrip ferrite circulators

作　　者：彭龙[1] 涂小强[1] 李乐中[1] 朱兴华[1] 李元勋[2] 

机构地区：[1]成都信息工程学院光电技术学院,四川成都610225 [2]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《电子元件与材料》2012年第6期40-43,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.61001025);国家重点实验室开放基金资助项目(No.KFJJ201102);中央高校基本科研业务费资助项目(No.ZYGX2011X006)

摘　　要：利用三维电磁仿真软件HFSS对鱼刺型微带铁氧体环行器进行了设计和仿真,并研究了铁氧体基片材料的饱和磁化强度Ms和铁磁共振线宽ΔH对环行器频率特性的影响。结果表明:Ms对环行器的频率特性影响显著,合理选择Ms可使环行器具有高反射、高隔离度及低损耗的特性;ΔH对环行器的频率特性影响较小,其值可在较宽范围内选择。当Ms=47.8 kA/m,ΔH=4.0 kA/m时,环行器在峰值频率3.8 GHz处的插入损耗、反射、隔离度及驻波比分别为0.17 dB,33.8 dB,48.6 dB和1.04,带宽大于300 MHz。A fish-bone type microstrip ferrite circulator was designed and simulated using the 3D electromagnetic simulation software HFSS. The effects of the saturation magnetization Ms and the ferromagnetic resonance linewidth AH of the ferrite substrate on the frequency characteristic of the circulator were investigated. The results show that Ms has significant effect on the frequency characteristic of the circulator, and high reflection, high isolation and low insertion toss can be achieved for the circulator when a suitable Ms is employed. However, A/-/shows little effect on the frequency characteristic of the circulator and hence can be chosen from a wide range. When Ms= 47.8 kA/m and AH = 4.0 kA/m, the circulator exhibits an insertion loss of0.17 dB, a reflection of 33.8 dB, an isolation of 48.6 dB, a standing wave ratio of 1.04 and a bandwidth beyond 300 MHz at the peak frequency of 3.8 GHz.

关 键 词：微波铁氧体 电磁性能 环行器 微带 HFSS 仿真 

分 类 号：TN61[电子电信—电路与系统]