Abstract
The properties of the plasma waveguide of finite thickness (plasma tube) have been studied. The analysis indicates that, in the case of finite thickness, most of the properties for the plasma waveguide with infinite thickness are retained. At high frequencies, such a plasma tube is still a nondispersive waveguide system. The losses due to the finite thickness of the cladding and the conductivity of the plasma are both small. The decay coefficient decreases with the thickness exponentially. With a thickness equal to the radius of the central core, the attenuation can be as low as 0.1 dB/km.
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