Variable permittivity dielectric material loaded stepped-horn antenna

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86[13] H. Patzelt and F. Arndt, "Double-plane steps in rectangular waveguides and theirapplication for transformers, irises, and filters," IEEE Trans. Microwave Theory Tech.,vol. 30, pp. 771-776, May 1982.[14] J. A. Encinar and J. M. Rebollar, "A hybrid technique for analyzing corrugated andnoncorrugated rectangular horns," IEEE Trans. Antennas Propagat., vol. 34, pp. 961-968, August 1986.[15] J. R. Mautz and R. F. Harrington, "Electromagnetic transmission through a rectangularaperture in a perfectly conducting plane," Technical report TR-76-1, SyracuseUniversity, Department of Electrical and Computer Engineering, Syracuse,New York13210,1976.[16] R.H.McPhie and A.I.Zaghloul, "Radiation from a rectangular waveguide with infiniteflange—exact solution by the correlation matrix method," IEEE Trans. AntennasPropagat., vol. 28, pp. 497— 503, July 1980.[17] R. E. Collin, Field Theory of Guided Waves. IEEE Press, 2nd ed., 1991.[18] G. V. Eleftheriades, A. S. Omar, L. P. B. Katehi, and G. M. Rebeiz, "Some importantproperties of waveguide junction generalized scattering matrices in the context of themode matching technique," IEEE Trans. Microwave Theory Tech., vol. 42, pp. 1896-1903, October 1994.[19] A. Ludwig, "The definition of cross-polarization," IEEE Trans. Antennas Propagat.,vol. 21, pp. 116-119, January 1973.[20] S. Gupta, A. K. Bhattacharyya, and A. Chakraborty, "Analsis of an open-ended waveguideradiator with dielectric plug," IEE Proc.-Microw. Antennas Propag.,, vol. 44, pp. 126-130, April 1997.[21] A. K. Bhattacharyya, "Multimode moment method formulation for waveguidediscontinuties," IEEE Trans. Microwave Theory Tech., vol. 42, pp. 1567-1571, August1994.[22] J. M. Reiter and F. Arndt, "Rigorous analysis of arbitrarily shaped h- and e-planediscontinuities in rectangular waveguides by a full-wave boundary contour modematchingmethod," IEEE Trans. Microwave Theory Tech., vol. 43, pp. 780-790, April1995.[23] W. Wessel, T. Siverding, and F. Arndt, "Mode-matching analysis of general waveguidemultiport junctions," IEEE MTT-S Digest, vol. 28, pp. 45-48,1999.[24] R. F. Harrington and J. R. Mautz, "A generalized network formulation for apertureproblems," IEEE Trans. Antennas Propagat., vol. 24, pp. 870-873, November 1976.[25] C. A. Balanis, Antenna Theory: Analysis and Design. New York: Wiley, 1982.
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Page 1 and 2:
Copyright Warning & RestrictionsThe
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VARIABLE PERMITTIVITY DIELECTRIC MA
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APPROVAL PAGEVARIABLE PERMITTIVITY
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To my parents, ..Tahsin and Güler
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TABLE OF CONTENTSChapterPage1 INTRO
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LIST OF FIGURESFigurePage2.1 Geomet
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FigureLIST OF FIGURES(Continued)Pag
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2field uniformity and this results
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4from improving the gain, dielectri
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Figure 2.1 Geometry of pyramidal a
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84Figure 2.4 Step discontinuity bet
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10section asFrom (2.4), the transve
Page 26 and 27:
12and for the magnetic fieldIn the
Page 28 and 29:
14where * shows complex conjugate.
Page 30 and 31:
16where D is a diagonal matrix of t
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18Figure 2.6 Generalized reflection
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20aperture region and 11Ps is the m
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22where T; (x) and T: (y) are trian
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24where Γwghnk and r wg enk are th
Page 40 and 41:
tiTo determine the unknown coeffici
Page 42 and 43:
28An electric vector potential F an
Page 44 and 45:
30Using midpoint rule to evaluate i
Page 46 and 47:
32whereGreen function integrals, 4,
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34taper and the phase distribution
Page 50 and 51: 36Even though, TE10 mode is an inci
Page 52 and 53: 38satisfy the amplitude ratio of 1/
Page 54 and 55: 40would be slight deviation from th
Page 56 and 57: 42increased to 15. Scattering matri
Page 58 and 59: 44Table 4.4 Amplitude and Phase of
Page 60 and 61: 46Figure 4.3, it is obvious that th
Page 62 and 63: 48al = 0.73A, b1 = 0.34A and apertu
Page 64 and 65: 50Table 4.7 Optimization Values of
Page 66 and 67: Figure 4.3 Input reflection coeffic
Page 68 and 69: Figure 4.5 Aperture efficiency vers
Page 70 and 71: Figure 4.7 Input reflection coeffic
Page 72 and 73: Figure 4.9 Aperture efficiency vers
Page 74 and 75: Figure 4.11 E-plane pattern versus
Page 76: 62Figure 4.13 Input reflection coef
Page 79 and 80: Figure 4.16 Aperture efficiency ver
Page 81 and 82: Figure 4.18 Amplitude of aperture m
Page 83 and 84: Figure 4.20 Amplitude of aperture m
Page 85 and 86: Figure 4.22 Input reflection coeffi
Page 87 and 88: Figure 4.24 Cross-polarization leve
Page 89 and 90: 751Figure 4.26 Amplitude of apertur
Page 91 and 92: 770.8Figure 4.28 Amplitude of apert
Page 93 and 94: Figure 4.30 Amplitude of aperture e
Page 95 and 96: 81Dielectric materials of various p
Page 97 and 98: The indefinite integrals associated
Page 99: BIBLIOGRAPHY[1] P. Clarricoats, A.
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