A Double U - Shaped Common Mode Filter On Defected Ground Structures

• Main Authors: Hui-Wen Wu, 吳惠雯
• Other Authors: Jiann-Chyi Rau
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/80418449513121598433

碩士 === 淡江大學 === 電機工程學系碩士在職專班 === 99 === The asymmetric differential signals arrive at different times at the end, It will result in the generation of common mode noise. The common mode noise might result which might then cause timing margins and electromagnetic interference (EMI) problems. The defected ground structures (DGS) might be utilized in all kinds of filter design. A new double U - shaped common-mode filter on defected ground structures can degrade common mode current and attenuation common mode insertion loss (SC2C1), but will not influence the differential mode insertion loss (SD2D1). The simulated results indicate that the differential mode insertion loss is less than -3 dB and the common mode insertion loss is less than -3.3 dB (form 0 to 10 GHz). Show in the relevant literature, the insertion loss close to 0 dB, meaning that the entire signals is transmitted the insertion loss the smaller. This is the double U - shaped common-mode filter advantage. It cans attenuation common mode noise, but will not influence the asymmetric differential signals is transmitted and lower costs.