Summary
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo
2019
Session Number:WedPM1B
Session:
Number:WedPM1B.2
A Broadband Common Mode Filter with Embedded Ring Structure
Ding-Bing Lin#, Yen-Hao Chen, You-Hao Zheng, Bo-Yao Chen,
pp.-
Publication Date:2016/10/5
Online ISSN:2188-5079
DOI:10.34385/proc.58.WedPM1B.2
Summary:
A broadband common mode filter embedded in the multi-layer printed circuit board is proposed in this paper. The filter is composed of four metal layers, and the ring structure with the serpentine transmission line connected on the third metal layer from the top to bottom layer is designed for creating transmission zeros at separate frequencies. This property is utilized to accomplish broadband suppression of common mode noise with a compact filter design. The common mode noise can be suppressed over 10 dB from 1.57 to 7.87 GHz with 133 percent fractional bandwidth. With this excellent performance of noise suppression, the differential mode insertion loss of the proposed common mode filter can still be smaller than 2 dB below 10 GHz.