Title :
OATS emission data compared with free space emission data
Author :
Leferink, Frank B J ; Groot-Boerle, Dick J. ; Puylaert, B.R.M.
Author_Institution :
Environ. Test Lab., Hollandse Signaalapparaten B.V., Hengelo, Netherlands
Abstract :
This paper presents the correction for free space (FS) with respect to open area test site (OATS) radiated emission data. This correction is applicable to levels measured in a complete absorber lined chamber (CALC) in order to compare these levels with legislative requirements, which are based on OATS measurements. The correction is also applicable to theoretical radiated emission data in order to compare these data with OATS measurement data. Only the influence of the ray paths on the site attenuation (SA) as obtained on an OATS and in a CALC is given. The effects of the antenna patterns, antenna mismatch, influence of metal on the antenna and near field effects are not treated. The correction for a small source located 1 m above the ground plane is given as an example. It is used to compare a practical CALC with an OATS via the site attenuation. A Pascal program used to calculate the correction for any setup is given
Keywords :
Pascal; anechoic chambers; antenna testing; attenuation measurement; electrical engineering; electrical engineering computing; electromagnetic interference; legislation; 1 m; OATS emission data; OATS measurement data; Pascal program; complete absorber lined chamber; free space emission data; ground plane; legislative requirements; open area test site; radiated emission data correction; ray paths; site attenuation; source; Antenna measurements; Attenuation; Bibliographies; Communication cables; Impedance measurement; Laboratories; Loaded antennas; Open area test sites; Receiving antennas; Testing;
Conference_Titel :
Electromagnetic Compatibility, 1995. Symposium Record., 1995 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3608-9
DOI :
10.1109/ISEMC.1995.523575
