Home > Research > Publications & Outputs > Design of helix slow-wave structure for a high ...
View graph of relations

Design of helix slow-wave structure for a high efficiency space TWT

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Design of helix slow-wave structure for a high efficiency space TWT. / Srivastava, V.; Ravinder, B.; Sinha, A. K. et al.

In: ITG-Fachbericht, No. 150, 01.12.1998, p. 349-351.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Srivastava, V, Ravinder, B, Sinha, AK, Joshi, SN & Carter, RG 1998, 'Design of helix slow-wave structure for a high efficiency space TWT', ITG-Fachbericht, no. 150, pp. 349-351.

APA

Srivastava, V., Ravinder, B., Sinha, A. K., Joshi, S. N., & Carter, R. G. (1998). Design of helix slow-wave structure for a high efficiency space TWT. ITG-Fachbericht, (150), 349-351.

Vancouver

Srivastava V, Ravinder B, Sinha AK, Joshi SN, Carter RG. Design of helix slow-wave structure for a high efficiency space TWT. ITG-Fachbericht. 1998 Dec 1;(150):349-351.

Author

Srivastava, V. ; Ravinder, B. ; Sinha, A. K. et al. / Design of helix slow-wave structure for a high efficiency space TWT. In: ITG-Fachbericht. 1998 ; No. 150. pp. 349-351.

Bibtex

@article{ef2ba524e180488d98e9705ff8792581,
title = "Design of helix slow-wave structure for a high efficiency space TWT",
abstract = "An approach of designing helix SWS for achieving high beam (interaction) efficiency of the TWT, is presented. The SWS parameters are determined for a C-band 60 W TWT at beam voltage 3.0kV and beam current 75mA. The rf phase velocity of the SWS is optimised with positive taper followed by negative taper. It is shown that the positive taper in the circuit not only enhances the beam efficiency but also improves linearity (reduced AM/PM factor and IM level) and reduces second harmonic power and provides less spreading in spent beam for high collector efficiency. The complete SWS is designed in two sections with sever in between for gain more than 50dB at saturation. Beam efficiency at saturation is computed more than 36% including the effect of circuit loss, second harmonic, 20% voltage reflection at the input and at output and the backward wave. AM/PM factor is found less than 3.0 degrees/dB; second harmonic power more than 12dB down; and 3rd order I/M level more than 10 dB down. The performance was checked over the full band from 3.60GHz to 4.20GHz.",
author = "V. Srivastava and B. Ravinder and Sinha, {A. K.} and Joshi, {S. N.} and Carter, {R. G.}",
year = "1998",
month = dec,
day = "1",
language = "English",
pages = "349--351",
journal = "ITG-Fachbericht",
issn = "0932-6022",
publisher = "VDE Verlag GmbH",
number = "150",

}

RIS

TY - JOUR

T1 - Design of helix slow-wave structure for a high efficiency space TWT

AU - Srivastava, V.

AU - Ravinder, B.

AU - Sinha, A. K.

AU - Joshi, S. N.

AU - Carter, R. G.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - An approach of designing helix SWS for achieving high beam (interaction) efficiency of the TWT, is presented. The SWS parameters are determined for a C-band 60 W TWT at beam voltage 3.0kV and beam current 75mA. The rf phase velocity of the SWS is optimised with positive taper followed by negative taper. It is shown that the positive taper in the circuit not only enhances the beam efficiency but also improves linearity (reduced AM/PM factor and IM level) and reduces second harmonic power and provides less spreading in spent beam for high collector efficiency. The complete SWS is designed in two sections with sever in between for gain more than 50dB at saturation. Beam efficiency at saturation is computed more than 36% including the effect of circuit loss, second harmonic, 20% voltage reflection at the input and at output and the backward wave. AM/PM factor is found less than 3.0 degrees/dB; second harmonic power more than 12dB down; and 3rd order I/M level more than 10 dB down. The performance was checked over the full band from 3.60GHz to 4.20GHz.

AB - An approach of designing helix SWS for achieving high beam (interaction) efficiency of the TWT, is presented. The SWS parameters are determined for a C-band 60 W TWT at beam voltage 3.0kV and beam current 75mA. The rf phase velocity of the SWS is optimised with positive taper followed by negative taper. It is shown that the positive taper in the circuit not only enhances the beam efficiency but also improves linearity (reduced AM/PM factor and IM level) and reduces second harmonic power and provides less spreading in spent beam for high collector efficiency. The complete SWS is designed in two sections with sever in between for gain more than 50dB at saturation. Beam efficiency at saturation is computed more than 36% including the effect of circuit loss, second harmonic, 20% voltage reflection at the input and at output and the backward wave. AM/PM factor is found less than 3.0 degrees/dB; second harmonic power more than 12dB down; and 3rd order I/M level more than 10 dB down. The performance was checked over the full band from 3.60GHz to 4.20GHz.

M3 - Journal article

AN - SCOPUS:0031653455

SP - 349

EP - 351

JO - ITG-Fachbericht

JF - ITG-Fachbericht

SN - 0932-6022

IS - 150

ER -