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Ultra-Wideband Common-Mode Rejection Structure with Autonomous Phase Balancing for Ultra-High-Speed Digital

Byung-Cheol Min1, Jeong-Sik Choi1, Hyun-Chul Choi1

  • 1School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Sensors (Basel, Switzerland)
|October 16, 2024
PubMed
Summary
This summary is machine-generated.

New common-mode rejection (CMR) structures enhance ultra-high-speed digital transmission for 5G/6G by effectively balancing phase and rejecting noise. These structures operate autonomously from DC to over 40 GHz, improving signal integrity.

Keywords:
balanced linecommon-mode rejection filterphase balancingultra-high-speed digital transmissionultra-wideband

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Signal Integrity

Background:

  • Common-mode noise significantly degrades high-speed digital circuit performance, particularly in 5G/6G communications.
  • Conventional common-mode rejection (CMR) filters and delay lines are frequency-limited (around 10 GHz) due to nonlinear phase interactions and electromagnetic interference.
  • Achieving robust common-mode noise suppression and phase balancing is critical for next-generation digital transmission.

Purpose of the Study:

  • To propose and demonstrate novel ultra-wideband common-mode rejection (CMR) structures with autonomous phase-balancing capabilities.
  • To overcome the frequency limitations of conventional CMR techniques for ultra-high-speed digital transmission.
  • To enhance signal integrity in 5G/6G communication systems by effectively mitigating common-mode noise.

Main Methods:

  • Design and fabrication of planar balanced line (BL)-based CMR structures, incorporating coplanar stripline (CPS) or parallel stripline (PSL) with additional lateral conductor strips.
  • Utilizing 3D electromagnetic (EM) simulations to model and predict the performance of the proposed CMR structures.
  • Experimental validation through fabricated prototypes, comparing measurement results with simulation data.

Main Results:

  • The proposed BL-based CMR structures demonstrate effective common-mode noise rejection with suppression levels exceeding 10 dB.
  • Autonomous phase recovery is achieved across a wide frequency range, from near DC to over 40 GHz.
  • The novel structures significantly extend the operational bandwidth compared to conventional methods.

Conclusions:

  • The developed BL-based CMR structures provide a viable solution for ultra-wideband common-mode noise suppression and phase balancing.
  • These structures are essential for enabling reliable ultra-high-speed digital transmission required by 5G/6G communications.
  • The proposed approach offers a significant advancement in achieving robust signal integrity in high-frequency applications.