Impedance effects on electromagnetic susceptibility

Technical Report · Mon Jun 01 00:00:00 EDT 1987

OSTI ID:6421958

Ng, W C; King, R J

This report studies the impedance effects on electromagnetic susceptibility for various loading conditions. From measurements of the self-impedance (Z/sub A/) and received voltage across 50 ohms at the terminals of a generic test object, a Thevenin equivalent circuit model is derived. Then, using this model, the load voltage, current, spectral energy density and accumulated energy are computed for several interesting load impedances. Of interest are two worst cases where the load impedance is the complex conjugate of Z/sub A/ and the conjugate pure reactance of Z/sub A/. Another case of particular interest is where the load impedance is that of an electronic unit representing that of a typical subsystem designed for operation at much lower frequencies. These three cases are compared with the voltage, current and energy at a 50 ohm load. It is concluded that the load voltage, current, spectral energy density and accumulated energy of the two conjugate cases can be one or two orders of magnitude larger than that for the 50 ohm case as might be expected. However, load voltage, current, and spectral energy density at the input of the electronic units tested are comparable to that of the 50 ohm case. The spectral energy density responses are generally within a factor of two (+-3 dB), but may be as large as a factor of three (+-5 dB) over narrow frequency bands.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6421958
• Report Number(s): UCID-21095; ON: DE87011900
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ELECTRONIC CIRCUITS
MAGNETIC SUSCEPTIBILITY
ELECTRIC IMPEDANCE
EQUIVALENT CIRCUITS
EXPERIMENTAL DATA
GHZ RANGE 01-100
MATHEMATICAL MODELS
MICROWAVE EQUIPMENT
DATA
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
GHZ RANGE
IMPEDANCE
INFORMATION
MAGNETIC PROPERTIES
NUMERICAL DATA
PHYSICAL PROPERTIES
420800* - Engineering- Electronic Circuits & Devices- (-1989)