hanslg@aol.com wrote:
> Trying to dechiffer the formula with my rather rusty knowledge, I see
> a radiating system (yes, antenna) there you, by exiting the
> conductors in different places manage to generate two different
> antennas that are isolated from each other. Not that hard to
> understand. You, probably have two dipoles (as the antenna is small)
> that radiates to different polarizations. You have the same thing
> with two crossed yagies or two helix with different rotations. As
> they radiate two different field (AKA orthogonal fields) they don't
> interact and are therefore isolated from each other even if they
> occupy the same area.
Exactly the idea
>
> I tried something similar (many years ago with a repeater antenna
> there I tried to isolate the transmitter and receiver antennas from
> each other. I was only successful to get some 15 dB isolation at
> best.)
And that's the challenge... 15 dB of isolation (which is tough to get,
over a broad band) implies a fair amount of correlation if both antennas
were used for receive (as in the article)
>
> I am sure the cell phone gadget manufacturer will adopt this antennas
> as is show (at least on paper) some improvements.
or, at least, the inventor hopes so...
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