TY - JOUR
T1 - Common-Mode Conversion Noise Mitigation with Embedded Coupled Lines in Differential Serpentine Delay Microstrip Lines
AU - Lee, Seungjin
AU - Lim, Jaehyuk
AU - Oh, Sangyeol
AU - Lee, Jaehoon
N1 - Funding Information:
Manuscript received September 5, 2019; revised January 15, 2020; accepted February 7, 2020. Date of publication March 10, 2020; date of current version December 14, 2020. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2018R1D1A1B07049347). (Corresponding author: Jaehoon Lee.) The authors are with the Department of Computer and Radio Communications Engineering, Korea University, Seoul 02841, South Korea (e-mail: seungjinjin2@korea.ac.kr; limjehunk@korea.ac.kr; sawoh86@korea.ac.kr; ejhoon@korea.ac.kr).
Publisher Copyright:
© 1964-2012 IEEE.
PY - 2020/12
Y1 - 2020/12
N2 - In this article, a novel method to suppress differential-to-common mode conversion noise in differential serpentine delay microstrip lines (DSDMLs) is proposed. To suppress the remnant mode conversion noise, embedded coupled lines are adopted in the parallel traces section of DSDMLs. Embedded coupled lines can minimize the timing delay between even-and odd-modes in the parallel traces section. In specific dimensions, embedded coupled lines propagate even-and odd-mode signals with the same velocity without changing the differential-mode impedance, so DSDMLs with embedded coupled lines can suppress differential-to-common mode conversion noise without degrading differential-mode signal quality. In simulations, the proposed DSDMLs exhibit about 93.0% suppression of the peak common-mode conversion voltage compared with conventional DSDMLs, regardless of the length of the parallel traces section of DSDMLs. The performance of our proposed DSDMLs is verified by conducting measurements with millimeter-scale test boards in the frequency and time domains. The test board exhibited 78.7% suppression of common-mode conversion noise without degrading the differential insertion loss compared with conventional DSDMLs. Simulations and measurement results exhibited good agreement.
AB - In this article, a novel method to suppress differential-to-common mode conversion noise in differential serpentine delay microstrip lines (DSDMLs) is proposed. To suppress the remnant mode conversion noise, embedded coupled lines are adopted in the parallel traces section of DSDMLs. Embedded coupled lines can minimize the timing delay between even-and odd-modes in the parallel traces section. In specific dimensions, embedded coupled lines propagate even-and odd-mode signals with the same velocity without changing the differential-mode impedance, so DSDMLs with embedded coupled lines can suppress differential-to-common mode conversion noise without degrading differential-mode signal quality. In simulations, the proposed DSDMLs exhibit about 93.0% suppression of the peak common-mode conversion voltage compared with conventional DSDMLs, regardless of the length of the parallel traces section of DSDMLs. The performance of our proposed DSDMLs is verified by conducting measurements with millimeter-scale test boards in the frequency and time domains. The test board exhibited 78.7% suppression of common-mode conversion noise without degrading the differential insertion loss compared with conventional DSDMLs. Simulations and measurement results exhibited good agreement.
KW - Bend discontinuity
KW - common-mode noise
KW - differential serpentine delay microstrip lines (DSDMLs)
KW - differential-to-common mode conversion noise
KW - embedded coupled lines
UR - http://www.scopus.com/inward/record.url?scp=85097994519&partnerID=8YFLogxK
U2 - 10.1109/TEMC.2020.2975831
DO - 10.1109/TEMC.2020.2975831
M3 - Article
AN - SCOPUS:85097994519
SN - 0018-9375
VL - 62
SP - 2558
EP - 2566
JO - IEEE Transactions on Electromagnetic Compatibility
JF - IEEE Transactions on Electromagnetic Compatibility
IS - 6
M1 - 9031730
ER -