Abstract
In this paper, we propose a method to suppress differential-to-common-mode conversion noise from right-angle bent differential lines by installing a mushroom structure on the narrow inner line. We assessed the mode conversion noise suppression characteristics of the proposed structure by analyzing dispersion diagrams. The proposed structure exhibits differential-to-common-mode conversion (Sd21) below-20 dB up to 6 GHz, while S cd21 of conventional right-angle bent differential lines is only maintained below-20 dB for frequencies up to 1.04 GHz. In addition, we suggest that further enhancements of the mode conversion suppression bandwidth can be achieved by installing multiple distributed mushroom structures on right-angle bent differential lines. The use of multiple distributed mushrooms enabled us to achieve a wider frequency bandwidth by compensating more fully for the phase difference between the inner and outer lines. Therefore, the right-angle bent differential lines with multiple distributed mushrooms can suppress mode conversion noise under-20 dB up to 10 GHz. We assessed the performance of our proposed structure by conducting measurements in both the frequency and time domains. We obtained a good agreement between our experimental and numerical results. In addition, we measured eye diagrams to demonstrate that the proposed structures suppress differential-to-common-mode conversion noise without degrading the differential signaling quality.
| Original language | English |
|---|---|
| Article number | 8626495 |
| Pages (from-to) | 702-711 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Components, Packaging and Manufacturing Technology |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Apr 1 |
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Keywords
- Bend discontinuity
- common-mode noise
- differential signaling
- differential-to-common-mode conversion noise
- mushroom structure
- right-angle bent differential lines
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
Cite this
Differential-To-Common-Mode Conversion Suppression Using Mushroom Structure on Bent Differential Transmission Lines. / Lee, Seungjin; Lim, Jaehyuk; Oh, Sangyeol; Kim, Yonghoon; Oh, Dan; Lee, Jae Hoon.
In: IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 9, No. 4, 8626495, 01.04.2019, p. 702-711.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Differential-To-Common-Mode Conversion Suppression Using Mushroom Structure on Bent Differential Transmission Lines
AU - Lee, Seungjin
AU - Lim, Jaehyuk
AU - Oh, Sangyeol
AU - Kim, Yonghoon
AU - Oh, Dan
AU - Lee, Jae Hoon
PY - 2019/4/1
Y1 - 2019/4/1
N2 - In this paper, we propose a method to suppress differential-to-common-mode conversion noise from right-angle bent differential lines by installing a mushroom structure on the narrow inner line. We assessed the mode conversion noise suppression characteristics of the proposed structure by analyzing dispersion diagrams. The proposed structure exhibits differential-to-common-mode conversion (Sd21) below-20 dB up to 6 GHz, while S cd21 of conventional right-angle bent differential lines is only maintained below-20 dB for frequencies up to 1.04 GHz. In addition, we suggest that further enhancements of the mode conversion suppression bandwidth can be achieved by installing multiple distributed mushroom structures on right-angle bent differential lines. The use of multiple distributed mushrooms enabled us to achieve a wider frequency bandwidth by compensating more fully for the phase difference between the inner and outer lines. Therefore, the right-angle bent differential lines with multiple distributed mushrooms can suppress mode conversion noise under-20 dB up to 10 GHz. We assessed the performance of our proposed structure by conducting measurements in both the frequency and time domains. We obtained a good agreement between our experimental and numerical results. In addition, we measured eye diagrams to demonstrate that the proposed structures suppress differential-to-common-mode conversion noise without degrading the differential signaling quality.
AB - In this paper, we propose a method to suppress differential-to-common-mode conversion noise from right-angle bent differential lines by installing a mushroom structure on the narrow inner line. We assessed the mode conversion noise suppression characteristics of the proposed structure by analyzing dispersion diagrams. The proposed structure exhibits differential-to-common-mode conversion (Sd21) below-20 dB up to 6 GHz, while S cd21 of conventional right-angle bent differential lines is only maintained below-20 dB for frequencies up to 1.04 GHz. In addition, we suggest that further enhancements of the mode conversion suppression bandwidth can be achieved by installing multiple distributed mushroom structures on right-angle bent differential lines. The use of multiple distributed mushrooms enabled us to achieve a wider frequency bandwidth by compensating more fully for the phase difference between the inner and outer lines. Therefore, the right-angle bent differential lines with multiple distributed mushrooms can suppress mode conversion noise under-20 dB up to 10 GHz. We assessed the performance of our proposed structure by conducting measurements in both the frequency and time domains. We obtained a good agreement between our experimental and numerical results. In addition, we measured eye diagrams to demonstrate that the proposed structures suppress differential-to-common-mode conversion noise without degrading the differential signaling quality.
KW - Bend discontinuity
KW - common-mode noise
KW - differential signaling
KW - differential-to-common-mode conversion noise
KW - mushroom structure
KW - right-angle bent differential lines
UR - http://www.scopus.com/inward/record.url?scp=85063885310&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063885310&partnerID=8YFLogxK
U2 - 10.1109/TCPMT.2019.2895310
DO - 10.1109/TCPMT.2019.2895310
M3 - Article
AN - SCOPUS:85063885310
VL - 9
SP - 702
EP - 711
JO - IEEE Transactions on Components, Packaging and Manufacturing Technology
JF - IEEE Transactions on Components, Packaging and Manufacturing Technology
SN - 2156-3950
IS - 4
M1 - 8626495
ER -