Electromagnetic Wave Absorber Measurement in a Large Coax

A large coaxial line for low- frequency absorber reflectivity measurements has been designed and built in Westerlo. It consists of a tapered 5 m long feed section and a uniform 12 m long section in which eight standard-base-size (0.61 m x 0.61 m) absorbers that are mounted on a carriage, can be inse...

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Bibliographic Details
Published in9th International Zurich Symposium and Technical Exhibition on Electromagnetic Compatibility pp. 541 - 546
Main Author Pues, H. F.
Format Conference Proceeding
LanguageEnglish
Published IEEE 12.03.1991
Subjects
Accuracy
Conductors
Frequency measurement
Impedance
Pollution measurement
Reflectivity
Surface impedance
Surface waves
Time-domain analysis
Transmission line measurements
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ISBN9781509031948
1509031944
DOI10.23919/EMC.1991.10781031

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Summary:A large coaxial line for low- frequency absorber reflectivity measurements has been designed and built in Westerlo. It consists of a tapered 5 m long feed section and a uniform 12 m long section in which eight standard-base-size (0.61 m x 0.61 m) absorbers that are mounted on a carriage, can be inserted. Using an automatic vector network analyser, the normal-incidence metal-backed reflectivity of the inserted absorbers can be measured accurately in the 0-140 MHz frequency range. The accurate knowledge of the reflectivity in this low frequency range is critically important for the proper design of shielded semi- anechoic and fully anechoic rooms used for radiated emission and immunity testing.
ISBN:9781509031948
1509031944
DOI:10.23919/EMC.1991.10781031