Design and Research on Wideband Common-Mode Band-Stop Filter with Double Absoprtion Bands

• Main Authors: Yu-Jen Chen, 陳宥任
• Other Authors: Cheng-Nan Chiu
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/sy2h53

碩士 === 元智大學 === 電機工程學系乙組 === 107 === The wide-band common-mode filters in the high-speed digital circuit are rarely to observe the amount of common-mode noise entering the structure, and because we cannot control the direction of the reflected common-mode noise, it may cause more unexpected electromagnetic interference, and makes some obstacles in communication transmission. Therefore, in this paper, by adding SMD resistors and designing the transmission line, which I gave a name called “common-mode noise matching circuit,” common mode noise can be consumed inside the absorptive common-mode filter, avoiding unnecessary electromagnetic interference, and also maintaining the broadband common-mode noise suppression effect and good differential signal performance. . At the end, the radiation ratio of the entire filter is confirmed to verify whether the radiation ratio of the structure is improved.