Browsing by Author "Tseng, Bin-Chyi"

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Analytical Solutions for the Radiated Emission of Parallel Microstrip Traces
(2011-08-01)
Tseng, Bin-Chyi
;
Liao, Li-Chun
;
Wu, Lin-Kun
;
Lung, Hui-Tsui
;
傳播研究所
A closed-form expression of the unintentional electromagnetic radiation of parallel microstrip traces is proposed. Based on transmission line theory, far-field Green's function, and concept of array factor in antenna theory, analytical solutions for the electric field radiated from a pair of parallel microstrip lines are developed. Depending on the printed circuit board material, dimension parameters, and termination impedances, the frequency and angular responses of far-field radiated emission on the upper half-plane can be analyzed by the presented method. The differential-and common-mode radiated emission solutions are validated by a full-wave simulator and test board measurements in a full-anechoic chamber.
Improvement of mode conversion for LTCC multi-layer common mode filter by twisted differential lines structure
(2006-01-01)
Tseng, Bin-Chyi
;
Chen, Zhi-Hui
;
Wu, Lin-Kun
;
電信工程研究所
;
Institute of Communications Engineering
In high-speed differential signaling interfaces, the multi-layered common-mode filter is one of the methods used to reduce common-mode noise. But since the differential traces in multi-layer structure is not perfect symmetric. The mode conversion will occur. By using the proposed twisted differential lines architecture, the asymmetrical circuit introduced between positive and negative traces is improved, so the mode conversion can be reduced. By inserting more twisted structures in each circuit design, the suppression effectiveness of mode conversion with twisted structure is also discussed.