Topband: Interesting article on LF antennas and propagation

[John Kaufmann]

TopBanders,

If you have access to the IEEE journals (perhaps at a technical library), 
check out the August 2000 issue of the IEEE Antennas and Propagation 
Magazine where you'll find a fairly technical but tutorial-type article, 
"Propagation Prediction Techniques and Antenna Modeling (150 to 1705 kHz) 
for Intelligent Transportation Systems Broadcast Applications".   A portion 
of the abstract reads:

"This paper discusses the basic aspects of radio-wave propagation and 
antenna modeling in the band of frequencies from 150 kHz to 1705 kHz.  The 
paper contains descriptions of both sky-wave and ground-wave 
propagation-prediction models, in addition to the methodology used to 
analyze antennas that operate in this band.  A method of calculating and 
normalizing antenna gain for systems computations is also discussed.  The 
sky-wave models described in this paper are valid from 150 kHz to 1705 
kHz.  The ground-wave models described in this paper are valid from 10 kHz 
to 30 MHz.  The propagation of radio waves in the band of frequencies from 
150 to 1705 kHz includes both a ground wave and a sky wave, and is quite 
different from propagation at any other frequency.  The methods used for 
antenna modeling and analysis in this band are also quite unlike those in 
other bands..."

The upper end of the frequency ranges mentioned is close enough to 160 that 
it should be of interest to many of us.

73, John W1FV



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