Mitigating differential skew by rotating meshed ground for high-density layout in flexible printed circuits

Chenyu Wang; Kengo Iokibe; Yoshitaka Toyota

doi:10.1587/elex.17.20200101

Mitigating differential skew by rotating meshed ground for high-density layout in flexible printed circuits

Chenyu Wang, Kengo Iokibe, Yoshitaka Toyota

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Asymmetry of differential transmission lines over a meshed ground plane causes differential skew, which leads to signal integrity issues. We measured to evaluate how the angle between the differential transmission lines and meshed ground (the rotation angle) affected differential skew. We also investigated the effect of the lines' position on characteristic impedance and the feasibility of high-density layout of the differential transmission lines, including the bend structure. We found that the differential skew and characteristic impedance are not significantly affected by the position of the differential transmission lines and meshed ground when the rotation angle is set to 30°, a relatively small value. Measurements showed that our design is effective.

Original language	English
Journal	IEICE Electronics Express
Volume	17
Issue number	10
DOIs	https://doi.org/10.1587/elex.17.20200101
Publication status	Published - 2020

Keywords

Differential skew
Differential transmission lines
Phase difference
Rotation-angle dependence

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1587/elex.17.20200101

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title = "Mitigating differential skew by rotating meshed ground for high-density layout in flexible printed circuits",

abstract = "Asymmetry of differential transmission lines over a meshed ground plane causes differential skew, which leads to signal integrity issues. We measured to evaluate how the angle between the differential transmission lines and meshed ground (the rotation angle) affected differential skew. We also investigated the effect of the lines' position on characteristic impedance and the feasibility of high-density layout of the differential transmission lines, including the bend structure. We found that the differential skew and characteristic impedance are not significantly affected by the position of the differential transmission lines and meshed ground when the rotation angle is set to 30°, a relatively small value. Measurements showed that our design is effective.",

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AU - Wang, Chenyu

AU - Iokibe, Kengo

AU - Toyota, Yoshitaka

N1 - Funding Information: This study was partially supported by Grant-in-Aid for Scientific Research (B) 16H04318. Publisher Copyright: Copyright © 2020 The Institute of Electronics, Information and Communication Engineers.

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Y1 - 2020

N2 - Asymmetry of differential transmission lines over a meshed ground plane causes differential skew, which leads to signal integrity issues. We measured to evaluate how the angle between the differential transmission lines and meshed ground (the rotation angle) affected differential skew. We also investigated the effect of the lines' position on characteristic impedance and the feasibility of high-density layout of the differential transmission lines, including the bend structure. We found that the differential skew and characteristic impedance are not significantly affected by the position of the differential transmission lines and meshed ground when the rotation angle is set to 30°, a relatively small value. Measurements showed that our design is effective.

AB - Asymmetry of differential transmission lines over a meshed ground plane causes differential skew, which leads to signal integrity issues. We measured to evaluate how the angle between the differential transmission lines and meshed ground (the rotation angle) affected differential skew. We also investigated the effect of the lines' position on characteristic impedance and the feasibility of high-density layout of the differential transmission lines, including the bend structure. We found that the differential skew and characteristic impedance are not significantly affected by the position of the differential transmission lines and meshed ground when the rotation angle is set to 30°, a relatively small value. Measurements showed that our design is effective.

KW - Differential skew

KW - Differential transmission lines

KW - Phase difference

KW - Rotation-angle dependence

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Mitigating differential skew by rotating meshed ground for high-density layout in flexible printed circuits

Abstract

Keywords

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