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: Aug. 19-23, Minneapolis, MN)


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

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; Common-Mode Current Loop; Differential-Mode Current Loop; Ground Plane; Microstrip; Mutual Inductance; Stripline

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





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

Publication Date

01 Aug 2002