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Analysis and Measurement of EMI Coupling for Aircraft Mounted Antennas at SHF/EHF

The mutual coupling between antennas is an important aspect of the overall electromagnetic interference (EMI) between electronic systems on advanced aircraft. There are several existing systems level computer codes which can analyze coupling between aircraft mounted antennas, but these are inadequate for EMI analysis at frequencies above 2 GHz for many of the complex geometries encountered in modern aircraft. In order to develop improved coupling analysis models, an evaluation of all existing analysis techniques and computer programs has been carried out. In addition, an extensive set of coupling measurements have been performed to assess the accuracy of the different analysis techniques. This paper describes these evaluations and measurements including a comparison of theoretical and experimental results.