屏蔽微带线特性的谱域导抗法分析  

Analysis of Shielded Microstrip by Spectral Domain Immittance Approach

作　　者：李超[1] 周斌[1] 李芳[1] 阴和俊[1] 

机构地区：[1]中国科学院电子学研究所,北京100080

出　　处：《电子与信息学报》2004年第4期632-639,共8页Journal of Electronics & Information Technology

摘　　要：本文用谱域导抗法分析了微带线的特性,研究了屏蔽盒对微带线传播特性和色散特性的影响。 谱域导抗概念的引入大大简化谱域方法中冗长的场公式推导过程,其分析结果又能保证相当高的精度。本文 的研究结果表明:屏蔽盒的顶盖使微带线等效介电常数变小,对色散特性影响不大;屏蔽盒的侧壁使微带线 等效介电常数变大,并减小了微带线的色散.Influence of the shielding box on the propagation and dispersion characteristics of microstrip has been analyzed by the spectral domain immittance approach. This greatly simplified the formulation process in traditional spectral domain method and the results remain a high level of accuracy. Numerical results show that top metal cover decreases the effective dielectric constant of microstrip, however, it does not have noticeable effects' on the dispersion characteristics of microstrip. The results also show that metal sidewalls increase the effective dielectric constant of microstrip and lower the dispersion of microstrip.

关 键 词：谱域导抗法 屏蔽微带线 屏蔽盒 色散 

分 类 号：TN817[电子电信—信息与通信工程]