Helicopters are relatively small compared to transport aircraft and over-equipped with radio-communications and radio-navigations equipment. A good positioning of related antenne is critical to achieve good performance in this very constrained context. Computer based models can help to achieve optimized antennae location at low cost over short development cycles. EUROCOPTER has been using the ASERIS-BE finite element software, developed at Aerospatiale, to study antennae radiation patterns. Successful computations, with respects to flight test results, were obtained on various helicopters in the HF (High Frequency), VHF (Very High Frequency) and UHF (Ultra High Frequency) ranges. The Boundary Element method (also known as the Method of Moments) used by ASERIS-BE is introduced briefly. Some HF, VHF and UHF radiation patterns computations are presented and compared to flight tests. An application of the same method to define the HIRF (High Intensity Radiated Fields) environment for helicopters in the HF band is also presented. Finally, EMC (Electromagnetic Compatibility) applications and research topics, including parallel computing are discussed.
Finite element modelling of antennae radiation patterns
Berechnung der optimalen Plazierung einer Hubschrauberantenne mit der Methode der finiten Elemente
1997
8 Seiten, 16 Bilder, 3 Quellen
Conference paper
English
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