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Experimental results on microwave pulse compression using helically corrugated waveguide

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13 Author(s)
McStravick, M. ; SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, Scotland, United Kingdom ; Samsonov, S.V. ; Ronald, K. ; Mishakin, S.V.
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The paper presents new results on the development of a method to generate ultrahigh-power short-microwave pulses by using a known principle of compression (reduction in pulse duration accompanying with increase in pulse amplitude) of a frequency-swept wave packet propagating through a dispersive medium. An oversized circular waveguide with helical-corrugations of its inner surface ensures an eigenwave with strongly frequency dependent group velocity far from cutoff. These dispersive properties in conjunction with high rf breakdown strength and low Ohmic losses make a helically corrugated waveguide attractive for increasing microwave peak power. The experiments performed at kilowatt power levels, demonstrate that an X-band microwave pulse of 80 ns duration with a 5% frequency sweep can be compressed into a 1.5 ns pulse having 25 times higher peak power by optimizing the frequency modulation of the input wave packet.

Published in:

Journal of Applied Physics  (Volume:108 ,  Issue: 5 )

Date of Publication:

Sep 2010

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