Waveguide system for high-power microwave pulse compression

M. McStravick, A.W. Cross, W. He, K. Ronald, C.G. Whyte, A.D.R. Phelps, I.V. Konoplev, P. McInnes

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

X-band passive microwave pulse compression is an interesting area of research in vacuum electronics. Applications include radar technology, plasma diagnostics etc. [1] The scientific study of producing high-power nanosecond microwave pulses, using passive sweep-frequency compression, was undertaken. Two novel helically corrugated waveguides were investigated; 3-fold and 5-fold, respectively. The 3-fold structure couples a TE1,1 travelling wave with a near cut-off TE2,1 wave producing a region far from cut-off with a large change in group velocity as a function of frequency. A 2.08 metre long copper helical waveguide was used to compress a 80ns, 5.5kW frequency-swept pulse from a high power TWT (TMD PTC6321), driven by an arbitrary waveform generator and vector signal generator, to a 1.5ns, 135kW pulse containing similar to 75% of the energy of the input pulse. To enhance the power capabilities of the microwave pulse compressor a more overmoded larger diameter 5-fold helical waveguide structure which adiabatically couples a TE3,1 traveling wave and a near cut-off TE2,2 wave was studied. Analysis of the dispersion characteristics carried out using CST MWS will be presented.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Vacuum Electronics Conference
Place of PublicationNew York
PublisherOptical Society of America
Pages62-63
Number of pages1
ISBN (Print)978-1-4244-3500-5
DOIs
Publication statusPublished - 28 Apr 2009

Publication series

NameIEEE International Vacuum Electronics Conference IVEC
PublisherOptical Society of America

Keywords

  • microwave pulse compression
  • helical waveguide
  • electromagnetic wave coupling

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