Reduction of Signal Line to Power Plane Coupling Using Controlled-Return-Current Transmission Lines
Abstract
In printed circuit boards, transmission of high-speed digital signals is achieved using single-ended or differential transmission lines, typically using a microstrip or stripline configuration. This requires continuous reference planes, which is difficult to maintain in multilayered IC packages or boards. As a result, the signal return current may need to flow between different reference planes due to a cut-out in the reference plane or a signal via transition. The uncontrolled path of the return current results in signal integrity and electromagnetic interference problems. We propose a new controlled-return-current transmission line design to reduce this problem. Our approach is based on guard traces to help control the return currents.
Fields of Study & Subjects
Electromagnetic Compatibility and Noise Suppression
Lightning and Electromagnetic Phenomena
Power Line Communications and Noise
Publication details
- Journal / source
- IMAPSource Proceedings
- Publisher
- IMAPS - International Microelectronics Assembly and Packaging Society
- Volume
- 2009
- Issue
- Symposium
- Publication date
- 28 April 2026
- Language
- EN