A Novel Broadband Common-mode Filter Using Defected Ground Structure
碩士 === 臺灣大學 === 電信工程學研究所 === 96 === A novel common mode filter using periodic defected ground structure (PDGS) is proposed in this thesis. Unlike raditional common mode choke using ferrite material, this kind of common mode filter with high frequency and broadband common-mode noise suppression capa...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2008
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| Online Access: | http://ndltd.ncl.edu.tw/handle/62528207855038733710 |
| Summary: | 碩士 === 臺灣大學 === 電信工程學研究所 === 96 === A novel common mode filter using periodic defected ground structure (PDGS) is proposed in this thesis. Unlike raditional common mode choke using ferrite material, this kind of common mode filter with high frequency and broadband common-mode noise suppression capability is embedded in inside printed circuit board without increasing any cost.
We focus on the study of the physical size parameters and characteristic behavior of the defected ground structure. The equivalent circuit model which is also proposed and presents good agreement whit the measurement result. In time domain analys is and measurement of the PDGS, the common mode noise due to the differential signal skew can be suppressed more than 60% for the propose filter. In EMI measurement, it is demonstrated this common mode filter can suppress common mode signal more than 10 dB within the stopband.
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