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Message-ID: <3.0.1.16.20010126183626.2c870d14@mail.cc.kuleuven.ac.be>
Date: Fri, 26 Jan 2001 18:36:26
To: rsgb_lf_group@blacksheep.org
From: "Rik Strobbe" <rik.strobbe@fys.kuleuven.ac.be>
Subject: Re: LF: Re.Re LF Beacon signals
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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.
>
>
>