Summary
International Symposium on Electromagnetic Compatibility
2014
Session Number:13P1-B
Session:
Number:13P1-B2
Suppression of Mode Conversion by Decreasing Path Difference by using an Asymmetrically Tapered Bend in Differential Transmission Lines
Shohei Kan, Yoshitaka Toyota, Kengo Iokibe, Tetsushi Watanabe,
pp.-
Publication Date:2014/05/12
Online ISSN:2188-5079
Summary:
A tightly coupled asymmetrically tapered bend to suppress differential-to-common-mode conversion (caused by bend discontinuity in a pair of differential transmission lines) is proposed. A tightly coupled tapered bend has been proposed to suppress the mode conversion by decreasing the path difference in the bend. The tightly coupled bend with symmetric tapers makes the path difference shorter so that the differential transmission lines are coupled more tightly, but a path difference of twice the line separation still remains. To decrease the remaining path difference, a pair of asymmetric tapers is proposed. A full-wave simulation demonstrated that the amount of differential-to-common-mode conversion was decreased by 29 dB compared to that of the symmetrically tapered bend. To suppress differential-mode reflection, furthermore, a tightly coupled bend with sectionally divided asymmetric tapers is suggested.