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A stripline antenna for radiated immunity testng

Dam, Franciscus Jozua van (2011) A stripline antenna for radiated immunity testng.

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Abstract:The use of different radiating structures for radiated susceptibility test Electromagnetic Compatibility (EMC)is a field of ongoing research. Especially with relative long wave lengths for frequencies between 2-30 MHz in the confined space of an anechoic chamber which is used to test for radiated susceptibility it is not easy to generate a strong and uniform electric field for large pieces of equipment. The main question in this research was to see whether it was possible to build a large stripline antenna for the testing of pieces of equipment of roughly 2.0m high, combined with a high field strength of 200 V/m when using a 2.5kW amplifier. Small stripline antennas have been internationally standardized for EMC testing for small components or wire bundles in the automotive industry in the ISO 11452-5. In this research available literature has been studied and stripline antennas have been simulated with computational electromagnetics software. Furthermore experiments with scale models in an anechoic chamber have been performed. Stripline antenna impedance depends heavily on the width/height. In order to keep the stripline antenna physically realizable with in the anechoic chamber, stripline antennas for input impedances greater than 50Ω have been simulated and tested in practice. Impedances of 200Ω and 100Ω have been transformed to 50Ω using ferrite core based unbalanced to unbalanced transmission line transformers of the Ruthroff type. Results of these experiments have led to a possible solution in the form of a wire stripline antenna with an impedance of 100Ω. The S11 parameter is -10 dB or better over a frequency range from 2 to 30 MHz.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Internet Science and Technology MSc (60032)
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