Compression of frequency-swept microwave pulses using a helically corrugated waveguide

Adrian Cross, Philip Macinnes, S.V. Samsonov, Alan Phelps, G Burt, Kevin Ronald, V.L. Bratman, G.G. Denisov, Alan Young, Colin Whyte, Wenlong He, I.V. Konoplev, H Yin

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Microwave pulse compression is an important area of research in vacuum electronics, with important applications for linear accelerators, RADAR and non-linear testing. The principles and methods of pulse compression differ greatly depending on the application. The concept of producing ultra-high-power nanosecond microwave pulses, using passive sweep-frequency compression, was studied. A novel waveguide with a helical corrugation of its inner surface was used as the microwave pulse compressor. This structure couples a TE11 traveling wave with a near cut-off TE21 wave producing a region far from cut-off with a large change in group velocity with frequency. A 2.08 meter long copper helical waveguide was used to compress a 67ns, 5.7kW frequency-swept pulse from a high power TWT, driven by a swept solid-state source, to a 2.8ns 68kW pulse containing similar to 50% of the energy of the input pulse. The dispersion characteristics of the helically corrugated waveguide was investigated both experimentally and theoretically. A vector network analyser was used to measure experimentally the dispersion characteristics of complex waveguides and the code MAGIC was used to calculate the dispersion theoretically. Good agreement between experimental results and theoretical predictions was observed.
LanguageEnglish
Title of host publicationIRMMW-THz2005
Subtitle of host publicationthe joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics
Place of PublicationNew York
PublisherIEEE
Pages431-432
Number of pages2
ISBN (Print)0780393481
DOIs
Publication statusPublished - 2005

Fingerprint

corrugated waveguides
sweep frequency
microwaves
pulses
pulse compression
waveguides
cut-off
linear accelerators
compressors
group velocity
traveling waves
solid state
copper
vacuum
predictions
electronics

Keywords

  • compression
  • frequency swept microwave pulses
  • helically corrugated waveguide

Cite this

Cross, A., Macinnes, P., Samsonov, S. V., Phelps, A., Burt, G., Ronald, K., ... Yin, H. (2005). Compression of frequency-swept microwave pulses using a helically corrugated waveguide. In IRMMW-THz2005: the joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics (pp. 431-432). New York: IEEE. https://doi.org/10.1109/ICIMW.2005.1572597
Cross, Adrian ; Macinnes, Philip ; Samsonov, S.V. ; Phelps, Alan ; Burt, G ; Ronald, Kevin ; Bratman, V.L. ; Denisov, G.G. ; Young, Alan ; Whyte, Colin ; He, Wenlong ; Konoplev, I.V. ; Yin, H. / Compression of frequency-swept microwave pulses using a helically corrugated waveguide. IRMMW-THz2005: the joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics. New York : IEEE, 2005. pp. 431-432
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title = "Compression of frequency-swept microwave pulses using a helically corrugated waveguide",
abstract = "Microwave pulse compression is an important area of research in vacuum electronics, with important applications for linear accelerators, RADAR and non-linear testing. The principles and methods of pulse compression differ greatly depending on the application. The concept of producing ultra-high-power nanosecond microwave pulses, using passive sweep-frequency compression, was studied. A novel waveguide with a helical corrugation of its inner surface was used as the microwave pulse compressor. This structure couples a TE11 traveling wave with a near cut-off TE21 wave producing a region far from cut-off with a large change in group velocity with frequency. A 2.08 meter long copper helical waveguide was used to compress a 67ns, 5.7kW frequency-swept pulse from a high power TWT, driven by a swept solid-state source, to a 2.8ns 68kW pulse containing similar to 50{\%} of the energy of the input pulse. The dispersion characteristics of the helically corrugated waveguide was investigated both experimentally and theoretically. A vector network analyser was used to measure experimentally the dispersion characteristics of complex waveguides and the code MAGIC was used to calculate the dispersion theoretically. Good agreement between experimental results and theoretical predictions was observed.",
keywords = "compression, frequency swept microwave pulses, helically corrugated waveguide",
author = "Adrian Cross and Philip Macinnes and S.V. Samsonov and Alan Phelps and G Burt and Kevin Ronald and V.L. Bratman and G.G. Denisov and Alan Young and Colin Whyte and Wenlong He and I.V. Konoplev and H Yin",
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Cross, A, Macinnes, P, Samsonov, SV, Phelps, A, Burt, G, Ronald, K, Bratman, VL, Denisov, GG, Young, A, Whyte, C, He, W, Konoplev, IV & Yin, H 2005, Compression of frequency-swept microwave pulses using a helically corrugated waveguide. in IRMMW-THz2005: the joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics. IEEE, New York, pp. 431-432. https://doi.org/10.1109/ICIMW.2005.1572597

Compression of frequency-swept microwave pulses using a helically corrugated waveguide. / Cross, Adrian; Macinnes, Philip; Samsonov, S.V.; Phelps, Alan; Burt, G; Ronald, Kevin; Bratman, V.L.; Denisov, G.G.; Young, Alan; Whyte, Colin; He, Wenlong; Konoplev, I.V.; Yin, H.

IRMMW-THz2005: the joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics. New York : IEEE, 2005. p. 431-432.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

TY - GEN

T1 - Compression of frequency-swept microwave pulses using a helically corrugated waveguide

AU - Cross, Adrian

AU - Macinnes, Philip

AU - Samsonov, S.V.

AU - Phelps, Alan

AU - Burt, G

AU - Ronald, Kevin

AU - Bratman, V.L.

AU - Denisov, G.G.

AU - Young, Alan

AU - Whyte, Colin

AU - He, Wenlong

AU - Konoplev, I.V.

AU - Yin, H

PY - 2005

Y1 - 2005

N2 - Microwave pulse compression is an important area of research in vacuum electronics, with important applications for linear accelerators, RADAR and non-linear testing. The principles and methods of pulse compression differ greatly depending on the application. The concept of producing ultra-high-power nanosecond microwave pulses, using passive sweep-frequency compression, was studied. A novel waveguide with a helical corrugation of its inner surface was used as the microwave pulse compressor. This structure couples a TE11 traveling wave with a near cut-off TE21 wave producing a region far from cut-off with a large change in group velocity with frequency. A 2.08 meter long copper helical waveguide was used to compress a 67ns, 5.7kW frequency-swept pulse from a high power TWT, driven by a swept solid-state source, to a 2.8ns 68kW pulse containing similar to 50% of the energy of the input pulse. The dispersion characteristics of the helically corrugated waveguide was investigated both experimentally and theoretically. A vector network analyser was used to measure experimentally the dispersion characteristics of complex waveguides and the code MAGIC was used to calculate the dispersion theoretically. Good agreement between experimental results and theoretical predictions was observed.

AB - Microwave pulse compression is an important area of research in vacuum electronics, with important applications for linear accelerators, RADAR and non-linear testing. The principles and methods of pulse compression differ greatly depending on the application. The concept of producing ultra-high-power nanosecond microwave pulses, using passive sweep-frequency compression, was studied. A novel waveguide with a helical corrugation of its inner surface was used as the microwave pulse compressor. This structure couples a TE11 traveling wave with a near cut-off TE21 wave producing a region far from cut-off with a large change in group velocity with frequency. A 2.08 meter long copper helical waveguide was used to compress a 67ns, 5.7kW frequency-swept pulse from a high power TWT, driven by a swept solid-state source, to a 2.8ns 68kW pulse containing similar to 50% of the energy of the input pulse. The dispersion characteristics of the helically corrugated waveguide was investigated both experimentally and theoretically. A vector network analyser was used to measure experimentally the dispersion characteristics of complex waveguides and the code MAGIC was used to calculate the dispersion theoretically. Good agreement between experimental results and theoretical predictions was observed.

KW - compression

KW - frequency swept microwave pulses

KW - helically corrugated waveguide

U2 - 10.1109/ICIMW.2005.1572597

DO - 10.1109/ICIMW.2005.1572597

M3 - Conference contribution book

SN - 0780393481

SP - 431

EP - 432

BT - IRMMW-THz2005

PB - IEEE

CY - New York

ER -

Cross A, Macinnes P, Samsonov SV, Phelps A, Burt G, Ronald K et al. Compression of frequency-swept microwave pulses using a helically corrugated waveguide. In IRMMW-THz2005: the joint 30th international conference on infrared and millimeter waves and 13th international conference on terahertz electronics. New York: IEEE. 2005. p. 431-432 https://doi.org/10.1109/ICIMW.2005.1572597