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antenna length vs. dielectric constant?

M

Marc H.Popek

Jan 1, 1970
0
here is a web site, for a group that has just obtained a patent that
optimizes the dielectric shrink, surface scattering and wave front focusing,
as you describe.


www.fwt.niat.net




Most antenna length formulas assume the antenna will be operating in either
air or a vacuum where the dielectric constant of "space" is equal to 1.

What happens to the length of a half-wave dipole when it is operated in a
space with a dielectric constant of 80?

Since the end-to-end capacitance increases with an increased dielectric constant
for the medium surrounding an antenna, I'm guessing that an antenna designed
for operation in air must be shortened to reduce both its incuctance and
end-to-end capacitance to regain the resonance it used to have in air. I
just don't know *how much* shorter.

Can somebody "do the math" for me?

Jim



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