Frequency up-conversion of a high-power microwave pulse propagating in a self-generated plasma

Spencer Kuo, A. Ren

Research output: Contribution to journalArticle

Abstract

In the study of the propagation of a high-power microwave pulse, one of the main concerns is how to minimize the energy loss of the pulse before reaching the destination. In the very high-power region, one has to prevent the cutoff reflection caused by the excessive ionization in the background air. A frequency autoconversion process that can lead to reflectionless propagation of powerful electromagnetic pulses in self-generated plasmas is studied. The theory shows that under the proper condition the carrier frequency ω of the pulse shifts upward during the growth of local plasma frequency ωpe. Thus, the self-generated plasma remains underdense to the pulse. A chamber experiment to demonstrate the frequency autoconversion during the pulse propagation through the self-generated plasma is conducted. The detected frequency shift is compared with the theoretical result calculated by using the measured electron density distribution along the propagation path of the pulse. Good agreement is obtained.

Original languageEnglish (US)
Pages (from-to)5376-5380
Number of pages5
JournalJournal of Applied Physics
Volume71
Issue number11
DOIs
StatePublished - 1992

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microwaves
pulses
propagation
electromagnetic pulses
carrier frequencies
plasma frequencies
frequency shift
density distribution
cut-off
energy dissipation
chambers
ionization
shift
air

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Frequency up-conversion of a high-power microwave pulse propagating in a self-generated plasma. / Kuo, Spencer; Ren, A.

In: Journal of Applied Physics, Vol. 71, No. 11, 1992, p. 5376-5380.

Research output: Contribution to journalArticle

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