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Progress In Electromagnetics Research
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BEAM-PRESENT ANALYSIS OF DISC-LOADED-COAXIAL WAVEGUIDE FOR ITS APPLICATION IN GYRO-TWT (PART-2)

By V. Kesari

Full Article PDF (212 KB)

Abstract:
The earlier developed combined beam-absent analysis of the disc-loaded-coaxial waveguide in two-configurations (part-1) has shown promise for wideband gyro-traveling-wave tube (gyro-TWT) if the configurations are used as interaction structure. In the present paper, the beam-present dispersion relation and small-signal gain equation in Pierce's format for the disc-loaded-coaxial waveguide were developed. A broadening of the device bandwidth was presented by disc-loading the coaxial waveguide interaction structure of a gyro-TWT with a comparison against the circular cylindrical waveguide, coaxial waveguide, and disc-loaded circular waveguide in their respective gain-frequency responses obtained by using a numerical computer code on the basis of the present beam-present analysis.

Citation:
V. Kesari, "Beam-Present Analysis of Disc-Loaded-Coaxial Waveguide for its Application in Gyro-TWT (Part-2)," Progress In Electromagnetics Research, Vol. 109, 229-243, 2010.
doi:10.2528/PIER10071505
http://www.jpier.org/PIER/pier.php?paper=10071505

References:
1. Rao, S. J., P. K. Jain, and B. N. Basu, "Broadbanding of gyro-TWT by dispersion shaping through dielectric loading," IEEE Trans. Electron Dev. Lett., Vol. 43, No. 12, 2290-2299, Dec. 1996.

2. Rao, S. J., P. K. Jain, and B. N. Basu, "Two-stage dielectric-loading for broadbanding a gyro-TWT," IEEE Electron Dev. Lett., Vol. 17, No. 6, 303-305, Jun. 1996.

3. Rao, S. J., P. K. Jain, and B. N. Basu, "Hybrid-mode helix-loading effects on gyro-travelling-wave tubes," Int. J. Electronics, Vol. 82, 663-675, 1997.

4. Singh, G., "Analytical study of the interaction structure of vane-loaded gyro-traveling wave tube amplifier," Progress In Electromagnetics Research B, Vol. 4, 41-66, 2008.

5. Kesari, V., P. K. Jain, and B. N. Basu, "Analysis of a circular waveguide loaded with thick annular metal discs for wideband gyro-TWTs," IEEE Trans. Plasma Sci., Vol. 33, No. 4, 1358-1365, Aug. 2005.

6. Kesari, V., Analysis of Disc-loaded Circular Waveguides for Wideband Gyro-TWTs, LAP-Lambert Academic Publishing AG & Co., Germany (ISBN: 978-3-8383-1145-6), 2009.

7. Basu, B. N., Electromagnetic Theory and Applications in Beam-Wave Electronics, World Scientific, Singapore, 1996.

8. Sangster, A. J., "Small-signal analysis of the travelling-wave gyrotron using Pierce parameters," Proc. IEE, Vol. 127, 45-52, 1980.

9. Sangster, A. J., "Small-signal bandwidth characteristics of a travelling-wave gyrotron amplifier," Int. J. Electronics, Vol. 51, 583-594, 1981.

10. Malek, F., "The analytical design of a folded waveguide traveling wave tube and small signal gain analysis using Madey's theorem," Progress In Electromagnetics Research, Vol. 98, 137-162, 2009.

11. Pierce, J. R., Traveling-Wave Tubes, D. Van Nostrand, New Jersey, 1950.

12. Zhu, Z. J., B. F. Jia, and D. M. Wan, "Efficiency improvement of helix traveling-wave tube," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 13, 1747-1756, 2008.

13. Duan, Z. Y., Y. B. Gong, Y. Y. Wei, W. X. Wang, B.-I. Wu, and J. A. Kong, "Efficiency improvement of broadband helix traveling wave tubes using hybrid phase velocity tapering model," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 7, 1013-1023, 2008.

14. Waldron, R. A., Theory of Guided Electromagnetic Waves, Van Nostrand Reinhold, London, 1970.

15. Vlasov, A. A., "The vibrational properties of an electron gas," Zh. Eksp. Teor. Fiz., Vol. 8, 291-318, 1938.


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