Lathas
Advanced Member level 4
If we are making a waveguide using hollow rectangular dielectric material outside and metal lining inside, do we need to consider 4-5 times skin depth for the metal lining thickness?
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skin depth a requirement inside waveguide
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biff44
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yes, of course. but the inner layer has the most current flow, so you can use different types of metals, where the most conductive is the innermost surface and still get decent loss
Anna Conda
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4-5 times the skin depth for the metal you are using should be ample, remember Al has a much greater skin thickness (or depth) than say copper or gold...
volker@muehlhaus
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Skin depth of aluminimum and gold are about the same.
Copper conductivity 5.8e7 S/m, relative skin depth 100%
Gold conductivity 4.09e7 S/m, relative skin depth 119%
Aluminium conductivity 3.72e7 S/m, relative skin depth 125%
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