Dipole and Snow
Dipole and Snow
(OP)
I am looking for some input? Using a half wave dipole at 72 megahertz FM with the antenna mounted on a flat roof and with the base of the antenna sitting in 4-6 inches of snow. Will the impedance or SWR change due to the snow?
Thanks in advance
rodger.booth@verizon.net
Thanks in advance
rodger.booth@verizon.net
RE: Dipole and Snow
RE: Dipole and Snow
biff44 is right, snow is air, ice is 3.2 dielectric and not too lossy, water is 81 dielectric and very lossy.
kch
RE: Dipole and Snow
RE: Dipole and Snow
Not sure of the loss tangent.
When it starts to melt is a problem.
I wonder how Direct TV does in the cold climates.
copy&pasted;
There is a high dielectric constant for ice at high frequencies (the constant is about 3.2). Ice has a very high dielectric relaxation time compared to water, and at higher frequencies the molecules are not able to
realign themselves to the changing electric field. This is why ice does not melt in a microwave as quickly as water comes to a boil.
kch