An external parasitic ground (return) plane inductance, or a mutual inductance associated with fringing magnetic fields in planar transmission line structures, is the culprit of common-mode voltage (ground plane noise) that leads to parasitic radiation of the corresponding unintentional "antennas" in high-speed electronic equipment. Mutual inductance of this sort in microstrip and stripline structures is studied here using an analytical quasi-magnetostatic approach and FDTD modeling. Closed-form expressions for mutual inductance in symmetrical and asymmetrical microstrip and stripline structures are presented.

Meeting Name

IEEE International Symposium on Electromagnetic Compatibility, 2002


Electrical and Computer Engineering

Keywords and Phrases

Asymmetrical Structures; Closed-Form Expressions; Common-Mode Voltage; Electromagnetic Interference; External Parasitic Ground Plane Inductance; Finite Difference Time-Domain Analysis; Finite Size Microstrip Geometries; Finite Size Stripline Geometries; Fringing Magnetic Fields; Ground Plane Noise; High-Speed Electronic Equipment; Inductance; Microstrip Lines; Mutual Inductance; Parasitic Radiation; Planar Transmission Line Structures; Quasi- Magnetostatic Approach; Return Plane Inductance; Strip Lines; Symmetrical Structures; Unintentional Antennas

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.