Re: Wave guides for very low frequencies Hz-kHz

Efthimios <eangelopoulos@[EMAIL PROTECTED]
> wrote:
> As you all know wave-guides have a cut off frequency (which depends
> mainly on dimensions of the guide) where in lower frequencies cannot
> propagate in the wave-guide. Usually wave-guides operate in the GHz
> range.
> 
> Do any of you know if same principle applies for lower frequencies, in
> the Hz ?kHz range?????

Yes.
 
> Theoretically it should, but I built one where the dimensions are many
> order of magnitude smaller than wave length but it seems that the
> principle does not apply. EM waves (freq: Hz-kHz) were propagating
> threw my guide.

It is not a waveguide unless the length is many wavelengths long.

A little more information would be helpful, like what are the dimensions
of this waveguide and how do you know lower frequencies were propagating. 

-- 
Jim Pennino

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