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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2016, № 12 · ELECTRODYNAMICS

Optimal Synthesis of Multimode Waveguide Components

A.P. Gashturi1,2, D.I. Sobolev1,2, G.G. Denisov1,2

1 Институт прикладной электродинамики РАН, Russia
2 Institute of Applied Physics of Russian Academy of Science, Russia
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Abstract

This paper describes realization of metal waveguide component synthesis procedure based on combination of the optimal iterative synthesis principles and the full wave analysis by electric field integral equation (EFIE). The synthesis procedure takes two electromagnetic field distributions (from input to output and backward) per each iteration and operates with tangential magnetic and normal electric fields on the waveguide wall, that are simply expressed in terms of surface current calculated in EFIE solution. The EFIE approach allows one to calculate all components of electromagnetic fields (EFIE is derived directly from Maxwell’s equations) and also it is quite fast relative to other full-wave analysis methods, such as FDTD, for example. For maximum efficiency of this combination of two methods, we use specific surface filters. The paper contents information of physical sense of these filters and some examples of usage. With the approach, different waveguide parts of electron devices can be synthesized with high efficiency. Calculations of two practical units illustrate the developed method: the waveguide mode converter with operating frequency 10 GHz and waveguide radius RW = 30 mm, which transforms TM0,1 mode into TE0,1, and gyrotron launcher with operating frequency 60 GHz and input radius RW = 15.5 mm, which converts TE7,3 mode of the circular waveguide into the inclined Gaussian wavebeam.

  • efficient synthesis method
  • MLFMA
  • wave guiding components
  • electron devices
  • эффективный метод синтеза
  • волноводные компоненты
Аннотация (на русском)

Метод оптимального синтеза многомодовых волноводных преобразователей

В статье описана реализация метода синтеза волноводных компонентов, основанного на сочетании оптимальной итерационной процедуры синтеза и численного метода 3D анализа электромагнитного поля с помощью интегрального уравнения для поверхностного тока - Electric Field Integral Equation (EFIE). Процедура синтеза оперирует с полями на стенке металла, которые напрямую выражаются в терминах поверхностного тока, который вычисляется решением EFIE. Такой подход позволяет конструировать различные волноводные преобразователи с высокой точностью. В статье рассмотрены два примера, иллюстрирующие работу метода.

For citation

Gashturi A.P., Sobolev D.I., Denisov G.G. Optimal Synthesis of Multimode Waveguide Components // Journal of Radio Electronics. – 2016. – No. 12.

References

  1. M. Thumm, "Modes and Mode Conversion in Microwave Devices", in Generation and Application of High Power Microwaves, edited by R.A. Cairns and A.D.R. Phelps, Eds. Bristol, U.K.: IOP, 1996, pp.121-171.
  2. Yu. Bykov, A. Eremeev, M. Glyavin, V. Kholoptsev, A. Luchinin, I. Plotnikov, G. Denisov, A. Bogdashev, G. Kalynova, V. Semenov and N. Zharova, "24-84-GHz Gyrotron Systems for Technological Microwave Applications", // IEEE Trans.Plasma Science, vol. 32, no. 1, pp. 67-72, Jan. 2004.
  3. A.P. Gashturi, A.V. Chirkov, G.G. Denisov, A.B. Paveliev, "Comparison of Different Methods for Calculating Gyrotron Quasi-Optical Mode Converters" // Journal of Infrared, Millimeter, and Terahertz Waves, Vol. 34, No. 1, pp. 62-70, (2013).
  4. Jin J.; Thumm, M., Piosczyk, B., Kern, S., Flamm, J., Rzesnicki, T., Novel Numerical Method for the Analysis and Synthesis of the Fields in Highly Oversized Waveguide Mode Converters, Microwave Theory and Techniques. // IEEE Transactions on, 2009, Volume: 57, Issue: 7, pp. 1661 - 1668.
  5. J. Robinson, Y. Rahmat-Samii, "Particle swarm optimization in electromagnetics", IEEE Trans. Antennas and Propagation, vol. 52, no. 2, pp. 397-407, Feb. 2004.
  6. D.I. Sobolev, G.G. Denisov, "Principles of Synthesis of Multimode Waveguide Units", IEEE Trans.Plasma Science, Vol. 38,no 10, pp. 2825 - 2830, Oct. 2010.
  7. A.P. Gashturi; D.I. Sobolev; G.G. Denisov, "Synthesis of multimode waveguide converters using full-wave EFIE field analysis method" 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
  8. Chew W., Jin J., Michielssen E. and Song J., "Fast and Efficient Algorithms in Computational Electromagnetics", Artech House, 2001.
  9. Coifman R., Rokhlin V., and Wandzuraz S., The Fast Multipole Method for the Wave Equation: A Pedestrian Prescription, IEEE Trans. Antennas Propag., vol. 35, pp. 7-12, June 1993.
  10. Neilson, J.M.; Bunger, R., Surface integral equation analysis of quasi-optical launchers, Plasma Science, IEEE Transactions on, 2002, Volume: 30, Issue: 3, pp 794 - 799.
  11. A. P. Gashturi, G. G. Denisov, S. V. Mishakin and S. V. Samsonov, Calculation and Optimization of 3D Waveguiding System with Help of Integral Equation Method, Journal of Infrared, Millimeter and Terahertz Waves, 30, No. 4, pp 319-327 (2009).
  12. Rao S. M., Wilton D. R. and Glisson A. W., Electromagnetic scattering by surface of arbitrary shape, IEEE Trans. Antennas Propag., vol. 30, pp. 409-418, May 1982.
  13. G.G. Denisov, A.N. Kuftin, V.I. Malygin, N.P. Venedictov, D.V. Vinogradov and V.E. Zapevalov, 110 GHz gyrotron with a built-in high-efficiency converter, Int. J. Electronics, 1992, Vol. 72, Nos. 5 and 6, pp. 1079-1091.