hayowazzup
Advanced Member level 4
Does anybody know how to find the dielectric constants of a waveguide, given the guide wavelength, operation frequency and the waveguide's dimensions.
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In any medium where a dielectric is present, the effective wavelength is shorter than that in vacuum by a reverse square root of the real part of permittivity. It hold also for waveguides.
If you can measure the wavelength in a waveguide with a dielectric filling, then you can calculate the real part of its permittivity knowing the wavelength in the same waveguide without the dielectric.