磁性薄膜微波噪声抑制器研究进展  

The Recent Research Development of Microwave Noise Suppressor Using Magnetic Films

作　　者：汪学锋[1] 钟智勇[1] 陈栖洲[1] 张怀武[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《材料导报（纳米与新材料专辑）》2010年第2期347-350,372,共5页

基　　金：教育部新世纪人才计划(901051);四川省杰出青年学术带头人培养计划(09ZQ026-092)

摘　　要：噪声抑制器是现代通信电路中抗电磁干扰的一种重要手段。介绍了磁性薄膜噪声抑制器噪声抑制机理:铁磁谐振和焦耳热损耗。综述了薄膜的电阻率、三维尺寸以及其他方面因素对其噪声抑制性能的影响规律,指出存在一个最佳薄膜电阻使得噪声损耗达到最大,电磁辐射达到最小,且在一定范围内,随着薄膜长度和厚度的增加、宽度的减小,薄膜的谐振频率逐渐提高,噪声的功率损耗逐渐加大,噪声抑制性能明显提高。Noise suppressor is an important means of anti-electromagnetic interference in modern commumcation circuits. Two kinds of noise suppression mechanism of magnetic film noise suppressor： ferromagnetic resonance and joule heat loss are described. The effects of the magnetic properties, resistivity, three-dimensional size of the films and other factors on the noise suppression performance are reviewed detailedly. Research shows that within a certain range, the resonance frequency and the power toss of noise gradually increased with the increase of film＇s length thickness and the decrease of width of the film, then noise suppression performance has been improved significantly.

关 键 词：磁性薄膜 噪声抑制器 铁磁谐振 涡旋电流 

分 类 号：TN86[电子电信—信息与通信工程]