It is noted that the most difficult radiated electromagnetic interference (EMI) problems with table-top products often occur at frequencies where the maximum dimensions of the product are much smaller than a wavelength. Electrically small table-top products tend to be much more efficient radiation sources than dipole source models would predict, and the radiation is generally much more difficult to contain than other types of EMI source models indicated. The ways in which electrically small sources radiate are investigated, and a technique for modeling electrically small table-top products that have power or signal cables is proposed. The end-driven wire model is a strategy for reducing the product to a form that is more readily analyzed. The results is a relatively simple configuration that includes only those parameters of the product that are of primary importance to the radiated EMI calculation.


Electrical and Computer Engineering

Keywords and Phrases

EM Radiation; EMI; EMI Source Models; Dipole Source Models; Electrically Small Sources; Electrically Small Table-Top Products; Electromagnetic Interference; End-Driven Wire Model; Power Cables; Radiation Sources; Signal Cables

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 1989 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 1989