2009-12-08
Design of TM0n - Mode Couplers for Diagnostics of a Vircator
By
Progress In Electromagnetics Research M, Vol. 10, 49-57, 2009
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, Sushant Kumar Chhotray, D. Senthil Kumar, K. S. Bhat, and Lalit 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
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        Google Scholar

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        Google Scholar

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        Google Scholar

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        Google Scholar

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        Google Scholar

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.        Google Scholar

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        Google Scholar

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        Google Scholar

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