Keywords
electromagnetic field
TEM cell
calibration
transvers electromagnetic wave
Abstract
This paper presents the results of research on the possibility of using a small GTEM (Giga Transverse ElectroMagnetic) cell as a reference source of electromagnetic fields (EMF). The results obtained allow for determining the practical application of such objects for selected EMC (ElectroMagnetic Compatibility) tests, which, with little investment, can be carried out, for example, in industrial conditions. The main objective of this work was to analyse the possibility of using a small GTEM cell as a EMF standard in the frequency range up to 3 GHz. In this area, experimental research was conducted, which involved generating EMF using a radiation testing system and calibrating the tested cell using probes with known parameters. The article presents a diagram of the measurement system, describes the measurement procedure, and presents a three-dimensional model of points in the GTEM cell space, where the tests were carried out using three triaxial measurement probes. As a result of analysis and research, the resonance frequencies of the cell were determined, a calculation scheme was proposed, and based on this, the calibration factor k was determined for a strictly defined frequency in the range up to 3 GHz. The main premise of the work carried out was to demonstrate the possibilities and limitations of using a small GTEM cell for both scientific research and industrial purposes.
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