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DESIGN OF TM0N- MODE COUPLERS FOR DIAGNOSTICS OF A VIRCATOR

By M. Sumathy, S. K. Chhotray, D. S. Kumar, K. S. Bhat, and L. Kumar

Full Article PDF (380 KB)

Abstract:
The waveguide and the coaxial-probe type wideband high power TM0n-mode couplers (n=1,2) were designed and qualified with respect to the coupling factor using the wheel-type mode launchers. The mode launchers and the mode couplers were simulated and experimentally tested, the former for the VSWR and the latter for the coupling factor. The coupler chamber has been used in single-shot experiments, the values of the measured frequencies of coupled output of a typical vircator agreed with those predicted values by particle-in-cell code simulation using MAFIA.

Citation:
M. Sumathy, S. K. Chhotray, D. S. Kumar, K. S. Bhat, and L. Kumar, "Design of TM0n- mode couplers for diagnostics of a vircator," Progress In Electromagnetics Research M, Vol. 10, 49-57, 2009.
doi:10.2528/PIERM09102601
http://www.jpier.org/pierm/pier.php?paper=09102601

References:
1. Peratt, A. L., C. M. Snell, and L. E. Thodel, "A high-power reflex triode microwave source," IEEE Trans. on Plasma Sci., Vol. 13, 498-505, 1985.
doi:10.1109/TPS.1985.4316464

2. Choi, E. H., M. C. Choi, Y. Jung, M. W. Chong, J. J. Ko, Y. Seo, G. Cho, H. S. Uhm, and H. Suk, "High-power microwave generation from an axially extracted virtual cathode oscillator," IEEE Trans. on Plasma Sci., Vol. 28, 2128-2134, 2000.
doi:10.1109/27.902240

3. Deshpande, M. D. and B. N. Das, "Input impedance of coaxial line tocircular waveguide feed," IEEE Trans. on MTT, Vol. 25, 954-957, 1977.
doi:10.1109/TMTT.1977.1129247

4. Macphie, R. H., "Input impedance of coaxial probe feeding a circular Waveguide in the TM01 mode," IEEE Trans. on MTT, Vol. 38, 334-337, 1990.
doi:10.1109/22.45357

5. Carmel, Y., et al., "A novel highly accurate synthetic technique for determination of the dispersive characteristics in periodicslow wave structure," IEEE Trans. on MTT, Vol. 40, 2086-2094, 1992.
doi:10.1109/22.168767

6. Sumathy, M., G. P. Kumar, and L. Kumar, "Particle-in-cell simulation of virtual cathode oscillator using MAFIA," Proc. IEEE American Electromagnetic Symposium, Maryland, June 2002.

7. Tomita, M. and Y. Karasawa, "Analysis of scattering and coupling problem of directional coupler for rectangular dielectric waveguides," Progress In Electromagnetics Research, Vol. 29, 295-320, 2000.
doi:10.2528/PIER99120601

8. Nedil, M. and T. A. Denidni, "Analysis and design of an ultra wideband directional coupler," Progress In Electromagnetics Research B, Vol. 1, 291-305, 2008.
doi:10.2528/PIERB07110704

9. Collin, R. E., Foundations for Microwave Engineering, IEEE Press, New York, 2001.


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