[MLB-WIRELESS] Helical Antennas & Interferance & Corkscrews

[Richard Van Orsouw]

Where you using helical's at both ends of the link?,

> ----------
> From: 	Brett Murphy
> Sent: 	Tuesday, 1 July 2003 10:47 AM
> To: 	melbwireless at wireless.org.au
> Subject: 	Re: [MLB-WIRELESS] Helical Antennas & Interferance &
> Corkscrews
> 
> They reduce signal on vertical and horizontal poles by 3dB
> I am using some on an inner suburb link, and since these problems you
> speak 
> of arose a few weeks ago, I have been unable to get more than 1mbit/sec 
> through the bridging link.
> My next step is to try normal cantennae horizontally polarised as I am 
> pretty sure said interference is vertical only.
> 
> 
> 
> At 10:41 AM 7/1/2003 +1000, you wrote:
> 
> >Can anyone enlighten me as to their experiences with Helical antennas and
> >their performance with regards to interferance.
> >http://www.wireless.org.au/~jhecker/helix/
> >
> >As I understand it, they have a circular polarisation like a corkscrew
> >effect.  Does this allow it to pickup more interference as I'm guessing
> it
> >would pickup horizontal and vertical....and everything in between?
> >
> >I'm trying to establish whether these would be a better option for inner
> >city links where there is a high 2.4Ghz noise floor.  Particularly around
> a
> >certain very tall structure I mentioned yesterday. *cough*
> >
> >To unsubscribe: send mail to majordomo at wireless.org.au
> >with "unsubscribe melbwireless" in the body of the message
> 
> 
> All the best,
> Brett Murphy
> Director, Alphalink (Australia) PTY LTD
> ph: +61 3 9495-9000 fax: +61 3 9486-6822
> email: me at murf.net
> 
> The contents of this message may not be quoted,
> copied, reproduced or published in part or in whole,
> without the written authorization of Brett Murphy,
> Director, Alphalink (Australia) Pty Ltd.
> 
> 
> 
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