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RE: LF: Ground loss

To: [email protected]
Subject: RE: LF: Ground loss
From: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 14 May 2002 16:17:40 +0000 (GMT)
In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>

Hi LF Group

On Sat, 23 Mar 2002, john sexton wrote:
If you do find a model that works, please let us know.


On the base of my own "generalased mirror reflection theory" I just have
derive the formula for ground loss resistance:


R = (lant/lcp)*a*Xc

where:

lant - wire length of antenna,
lcp  - wire length of ground system (conterpoint),
a = (eps0*w)/s,
eps0 - dielectric constant (8.85e-12 F/m),
w = 6.28*f - circular frequency,
s - ground conductivity.
Xc = 1/(w*C) - antenna reactance,
C - antenna capasitance.

For 136 kHz and s=1 mSm/m a is about 0.01


The formula is very aproximative but yelds reasonable value of R.

Now I work on more advanced formula wich should be more accurate.

Any coments please!

73 de RA9MB/Alex
http://www.qsl.net/ra9mb





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