Plasma Waveguide: Frequency Limitations Explained

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akru
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1.i need urgent clarification in this regard .waveguides can be modeled as high pass filters.how ever plasma waveguide guides only those waves which are below plasma frequency. why is it so?
 

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I'm not familiar with plasma waveguides per se, but it might be related to the dispersion relation for waves in plasmas.
 

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