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Re: LF: Re.Re LF Beacon signals

To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re.Re LF Beacon signals
From: "Rik Strobbe" <rik.strobbe@fys.kuleuven.ac.be>
Date: Fri, 26 Jan 2001 18:36:26
In-reply-to: <000101c087a5$fcdbf100$f6c0883e@lvm>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: <majordom@post.thorcom.com>
Laurie,

you're right about the 8-shaped pattern, in fact the pattern is very
similar to that of a lambda/2 dipole (in free space).
A Marconi antenna has more directivity than a loop (4.8dBi versus 1.8dBi).
Radiation patterns of both antennas are very different, a loop is much more
sensitive to 'high angle' signals. So it all depends of where the QRN
sources are.

73, Rik  ON7YD

At 14:40 26/01/01 -0000, you wrote:
Hi Rik,

But the maximum of a loop is very broad so Im afraid it wont give any
improvement in regard to atmospheric QRM.
  Im not so sure! analysis using EZNEC shows a "fig8" azimuth pattern,at
least
for vert. polarisation and I doubt wether the horiz component will actually
exist in practice.
Afraid my letters went to the wrong address, but when you do get them please
have a look at figs 2/4.
73s Laurie.




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