T. Higashiguchi et al., Enlarged frequency upshift from DC to AC radiation converter using boundary effect of plasma-filled waveguide, JPN J A P 1, 39(12A), 2000, pp. 6578-6579
Further frequency upshift from a DC to AC radiation converter is analyzed a
nd experimentally observed by taking into account the boundary effect of a
plasma-filled waveguide. The radiation frequency depends on both plasma den
sity and cut-off frequency of the waveguide. The observed frequencies of th
e emitted radiation are in reasonable agreement with the expected theoretic
al values.