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Large E Field Generators In Semi-Anechoic Chambers For Full Vehicle Immunity Testing

Several standards recommend the use of transmission line systems (TLS) as the field generation equipment for immunity testing. The assumption is that these systems provide a uniform field that will illuminate the whole vehicle under test. Additionally, it is assured that these systems do not radiate and that the shielded semi-anechoic chamber has no effect on their performance. In this paper the reader will be educated on the fact that the TEM field supported by these structures is not perfectly uniform over the volume occupied by the vehicle at all frequencies, and that the structure will radiate and that it will couple to the chamber enclosure. The coupling will produce potential resonances at certain frequencies depending on the size of the chamber and the height of the generator.

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Title
Large E Field Generators In Semi-Anechoic Chambers For Full Vehicle Immunity Testing
Author Vicente Rodriguez
Publication Safety & EMC Magazine
Date April 2015
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