[TowerTalk] Fwd: Isolated Mode Antenna Technology

[hanslg at aol.com]

 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.

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.)

I am sure the cell phone gadget manufacturer will adopt this antennas as is show (at least on paper) some improvements.

73 de Hans - N2JFS

 

 

-----Original Message-----
From: Bill Aycock <billaycock at centurytel.net>
To: Steve Sacco NN4X <nn4x at embarqmail.com>; towertalk at contesting.com
Sent: Sat, Dec 19, 2009 8:03 pm
Subject: Re: [TowerTalk] Isolated Mode Antenna Technology


Is it just my ignorance, or does this "description" make no sense?I read it 
more than once, and tried to look up some words I did not recognize in the 
Wikipedia and the Wictionary. (I got MIMO, but meanderline escaped me)  I 
have rarely seen a paper (Supposed to be Technical) that used more words and 
explained less than the one included as an example. There was one mystical 
equation and some figures, but nothing to say what was happening. There was 
one sketch of a device with labeled parts, but no explanation.
WHEW! Help me.
Bill-W4BSG

----- Original Message ----- 
From: "Steve Sacco NN4X" <nn4x at embarqmail.com>
To: <towertalk at contesting.com>
Sent: Saturday, December 19, 2009 12:28 PM
Subject: [TowerTalk] Isolated Mode Antenna Technology


> This seemed like an interesting concept.  I thought I'd pass it along.
>
> Isolated Mode Antenna Technology lets a single antenna offer the
> performance benefits of multiple antennas (Part 1 of 2)
>
> <http://www.rfdesignline.com/howto/showArticle.jhtml;jsessionid=F1SQHL23DOWTNQE1GHPCKHWATMY32JVN?articleID=222001586>
>
> 73,
> Steve
> NN4X
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