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From: ralph@arising.com.au
Date: 04 Apr 2002
Time: 22:59:03
Remote Name: 152.91.9.49
I have made a antenna which was dielectrically loaded by water. I found a suitable plastic tube and put my wire dipole inside, blocked off the end and starting filling it with water whilst measuring the resonant frequency of the feedpoint.
The length reduction is significant because water has a dielectric constant of approximately 80. The maximum reduction in length you could hope for would be approximately 9 times under the assumption that you had enough water encompassing the field.
It was an interesting experiement, but the complexities of weight and the fact that the radiating element deteriorates due to corrosion has to be overcome.
I recall that TiO2 has been used in an experiement published by antennex, so search the archives.