A Study on the Distribution and Uniformity of Symmetric Extended TEM Cells
Keywords:
Electric field, field uniformity, TEM Cells, uncertaintyAbstract
TEM Cells can generate computable standard fields, which are often used in electromagnetic measurement systems. Their electromagnetic field uncertainty has a great influence on the evaluation of system measurement results. In this paper, a method and index for rigorous evaluation of the uniformity of electromagnetic field distribution in the test area are presented. The relationship between different measurement accuracies and the size limits of the test object is analyzed by HFSS. According to this relationship, the limit condition of the sample size is established when the E field measurement accuracy is 1dB. Among them, the height requirements are consistent with the traditional experience requirements, and the width requirements are more stringent. On this basis, the electric field distribution law of the symmetric extended TEM chamber is studied and analyzed. It shows that the field uniformity of the symmetric extended TEM room is basically unchanged when the test space is multiplied.
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References
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