Vol. 61

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2006-05-20

A Novel Modeling Technique to Solve a Class of Rectangular Waveguide Based Circuits and Radiators.

By Sushrut Das and Ajay Chakraborty
Progress In Electromagnetics Research, Vol. 61, 231-252, 2006
doi:10.2528/PIER06010302

Abstract

A new methodology has been developed, based on moment method; for analyzing a class of rectangular waveguide based circuits and radiators. The methodology involves in modeling the given structure using tetragonal bricks or cavities and then replacing all the apertures and discontinuities with equivalent magnetic current densities so that the given structure can be analyzed using only the Magnetic Field Integral Equation (MFIE). As it is necessary to use a number of such cavities in order to study these complicated waveguide structures, the present method is named as Multiple Cavity Modeling Technique (MCMT). The ma jor advantage for using the MCMT in rectangular waveguide based structures is the fact that since only the magnetic currents present in the apertures are considered the methodology involves only solving simple magnetic field integral equations rather the coupled integral equation involving both the electric and magnetic currents. Further it is possible to consider both co and cross polarization and also the thickness of the waveguide discontinuities like diaphragm thickness or window thickness in the analysis. Due to this, it is possible to get highly accurate result. It is also possible to extend the method to any number of resonators, cavities or irises regardless of the polarization. To demonstrate, the methodology has been applied to analyze an open end of a waveguide with dielectric plug, both in transmitting and receiving mode, and a waveguide step discontinuity. Even mode and odd mode admittances of interacting identical inductive diaphragms have also been calculated using this methodology. Data obtained using this technique has been compared with measured, CST microwave studio simulation and literature available data. The theory has been validated by the reasonable agreement obtained between experimental data, simulated data and literature available data with numerical data

Citation

 (See works that cites this article)
Sushrut Das and Ajay Chakraborty, "A Novel Modeling Technique to Solve a Class of Rectangular Waveguide Based Circuits and Radiators.," Progress In Electromagnetics Research, Vol. 61, 231-252, 2006.
doi:10.2528/PIER06010302
http://www.jpier.org/PIER/pier.php?paper=0601032

References


    1. Gupta, S., A. Bhattacharyya, and A. Chakraborty, "Analysis of an open-ended waveguide radiator with dielectric plug," IEE Proc. -Microw. Antennas Propag., Vol. 144, No. 2, 126-130, 1997.
    doi:10.1049/ip-map:19971016

    2. Swift, C. T. and D. M. Hatcher, "The input admittance of a rectangular aperture antenna loaded with a dielectric plug," NASA Tech. Note TN-D-4430, No. 4, 1968.

    3. Swift, C. T., "Admittance of a waveguide-fed aperture loaded with dielectric plug," IEEE Trans. on Antennas and Propagation, Vol. 17, No. 3, 356-359, 1969.
    doi:10.1109/TAP.1969.1139456

    4. Katrich, A. V., N. A. Dumin, and A. O. Dumina, "Radiation of transient fields from the open end of rectangular waveguide," International Conference on Antenna Theory and Techniques, 9-12, 2003.

    5. Das, S. and A. Chakrabarty, "Application of multiple cavity modeling technique for accurate analysis of waveguide fed thick rectangular window," ELECTRO, 3-5, 2005.

    6. Das, S. and A. Chakrabarty, "Comparison of an open ended waveguide radiator performance with and without matching stub," International Conference on Antenna Technology, 23-25, 2005.

    7. Encinar, J. A. and J. M. Rebollar, "Convergence of numerical solutions of open-ended waveguide by modal analysis and hybrid modal-spectral techniques," IEEE Trans. on Microwave Theory and Technique, Vol. MTT-34, No. 7, 809-814, 1986.
    doi:10.1109/TMTT.1986.1133445

    8. Baudrand, H., J.-W. Tao, and J. Atechian, "Study of radiating properties of open-ended rectangular waveguides," IEEE Trans. on Antennas and Propagation, Vol. 36, No. 8, 1071-1077, 1988.
    doi:10.1109/8.7219

    9. Zhongxiang, S. and R. H. MacPhie, "A simple method for calculating the reflection coefficient of open-ended waveguides," IEEE Trans. on Microwave Theory and Techniques, Vol. 45, No. 4, 546-548, 1997.
    doi:10.1109/22.566636

    10. Cohen, M. H., T. H. Crowley, and C. A. Levis, "The aperture admittance of a rectangular waveguide radiating into half-space," Rep.339-22, 33-38, 1951.

    11. Das, B. N., "Admittance of rectangular apertures," Journal of the Institute of Electronics and Telecommunication Engineers, Vol. 22, No. 3, 133-137, 1976.

    12. MacPhie, R. H. and A. I. Zaghloul, "Radiation from a rectangular waveguide with infinite flange-exact solution by the correlation matrix method," IEEE Trans. on Antennas and Propagation, Vol. AP-28, No. 7, 497-503, 1980.
    doi:10.1109/TAP.1980.1142376

    13. Gupta, S., "Electromagnetic field estimation in aperture and slot antennas with their equivalent network representation," Ph.D. Dissertation, 1996.

    14. Eleftheriades, G. V., A. S. Omar, L. P. B. Katehi, and G. M. Rebeiz, "Some important properties of waveguide junction generalized scattering matrices in the context of the mode matching technique," IEEE Trans. of Microwave Theory and Techniques, Vol. 42, No. 10, 1896-1903, 1994.
    doi:10.1109/22.320771

    15. Mongiardo, M., P. Russer, M. Dionigi, and L. B. Felsen, "Waveguide step discontinuities revisited by the generalized network formulation," Microwave Symposium Digest, 7-12, 1998.

    16. Chen, C., K. Choi, H. K. Jung, and S. Y. Hahn, "Analysis of waveguide discontinuities in H-plane using finite element- boundary element technique," IEEE Trans. Of Magnetics, Vol. 30, No. 5, 3168-3171, 1994.
    doi:10.1109/20.312610

    17. Lin, S. L., L. W. Li, T. S. Yeo, and M. S. Leong, "Novel unified mode matching analysis of concentric waveguide junctions," IEEE Trans. on Antennas and Propagation, Vol. 148, No. 6, 369-374, 2001.

    18. Wexler, A., "Solution of waveguide discontinuities by modal analysis," IEEE Trans. Microw. Theory Tech., Vol. MTT-15, No. 9, 508-517, 1967.
    doi:10.1109/TMTT.1967.1126521

    19. Levy, R., "Derivation of equivalent circuits of microwave structures using numerical techniques," IEEE Trans. Microw. Theory Tech., Vol. 47, No. 9, 1688-1695, 1999.
    doi:10.1109/22.788610

    20. Guglielmi, M. and C. Newport, "Rigorous, multimode equivalent network representation of inductive discontinuities," IEEE Trans. Microw. Theory Tech., Vol. 38, No. 11, 1651-1659, 1990.
    doi:10.1109/22.60012

    21. Palais, J. C., "A complete solution of the inductive iris with TE10 incidence in rectangular waveguide," IEEE Trans. of Microwave Theory and Techniques, Vol. 15, No. 3, 156-160, 1967.
    doi:10.1109/TMTT.1967.1126405

    22. Rozzi, T. E., "Equivalent network for interacting thick inductive irises," IEEE Trans. on Antennas and Propagation, Vol. 20, No. 5, 323-330, 1972.

    23. Rozzi, T. E., "The variational treatment of thick interacting inductive irises," IEEE Trans. on Antennas and Propagation, Vol. 21, No. 2, 82-88, 1973.

    24. Collin, R. E., "Variational methods for waveguide discontinuities," Field Theory of Guided Waves, 1960.

    25. Harrigton, R. F., "Deterministic problems," Field Computation by Method of Moments, 5-9, 1968.

    26. Mittra, R., T. Itoh, and T.-S. Li, "Analytical and numerical studies of the relative convergence phenomenon arising in the solution of an integral equation by the moment method," IEEE Trans. Microw. Theory Tech., Vol. MTT-20, No. 2, 96-104, 1972.
    doi:10.1109/TMTT.1972.1127691

    27. Harrigton, R. F, "Microwave network," Time Harmonic Electro- magnetic Fields, 389-391, 1961.

    28. Chakrabarty, A., "Synthesis of phase function for a desired radi- ation pattern and fixed amplitude distribution," Ph.D. Disserta- tion, 1981.