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[tickmike]

An interesting item        http://www.bbc.co.uk/news/science-environment-17221490

Now where did I put the old satellite dishes ?.

I think I will add this to my list of future experiments. 

[roseway]

That's quite fascinating. It sounds a bit like science fiction, but they've actually demonstrated it.

[tonyappuk]

Does this have any relationship to helical polarisation that was used/proposed for mobile broacasting I wonder? It sounds too good to be true but you can already give some protection between systems using the same frequency by using horizontal and vertical polarisation. Interesting though.
Tony