Solution:
An adequate numerical analysis
for the scattering characteristics of an adequate numerical model of the
wind generator has to be established.
An integral equation approach (moment
method) is the only applicable method.
The total system analysis comprisis
the antenna problem, the scattering problem and the VOR/DVOR-system analysis
itself .
The problem is highly tridimensional
and have to include the ground and the counterpoise.
Theoretical worst case estimates
may be applied adequately, e.g. signal to noise ratios and VOR/DVOR improvement
factors.
Results:
Due to the large structure the
total wind generator is decomposed electrically into relevant components.
Details of the structure influence
the modelling, e.g. presence or non-presence of lightning conductors in
the blades.
The large metallic case has shown
to be an effective object as well as the blades depending on its construction
and distance to the VOR/DVOR-antenna.
Fig. 2 shows a typical
behaviour of the signal to noise ratio for a given case and Fig. 3 shows the time/angular variant bistatic scattering pattern of
a metallic blade.
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