Parasitic inductance in printed circuit board geometries can worsen the EMI performance and signal integrity of high-speed digital designs. Partial-inductance theory is a powerful tool for analyzing inductance issues in signal integrity. However, partial inductances may not adequately model magnetic flux coupling to EMI antennas because the EMI antennas are typically open loops. Therefore, partial inductances may not always accurately predict radiated EMI from noise sources, unless used in a full-wave analysis such as PEEC. Partial inductances can be used, however, to estimate branch inductances, which can be used to predict EMI. This paper presents a method for decomposing loop or self inductances into branch inductances. Experimental as well as analytical investigations are used to compare branch- and partial-inductances

Meeting Name

1998 IEEE International Symposium on Electromagnetic Compatibility, 1998


Electrical and Computer Engineering

Keywords and Phrases

EMI Antennas; Branch Inductances; Electromagnetic Interference; Equivalent Circuits; Inductance; Magnetic Field Coupling; Magnetic Fields; Magnetic Flux; Magnetic Flux Coupling; Parasitic Inductance; Partial Inductance Theory; Printed Circuit Board Geometries; Printed Circuits; Radiated EMI Performance; Signal Integrity

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 1998 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.