Variable permittivity dielectric material loaded stepped-horn antenna

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84The definite integral is obtained from the indefinite integral by adding the indefiniteintegral evaluated at the upper limits to that at both lower limits and subtracting bothevaluations of the indefinite integral at the mixed (one upper,one lower) limits.
BIBLIOGRAPHY[1] P. Clarricoats, A. Olver, and B. Ok, "Broadband low-crosspolarization horn," ElectronicLetters, vol. 30, pp. 2085-2086, December 1994.[2] P. Clarricoats, A. Olver, and K.Raghavan, "Mode conversion in dielectric loaded horns,"Antennas and Propagation Society International Symposium,AP-S. Digest, vol. 1,pp. 362-365,6-10 June 1988.[3] G.N.Tsandoulas and W. Fitzgerald, "Aperture efficiency enhancement in dielectric loadedrectangular horns," IEEE Trans. Antennas Propagat., vol. 20, pp. 69-74, March 1972.[4] L. Oh, S. Peng, and C. Lunden, "Effects of dielectrics on the radiation patterns of anelectromagnetic horn," IEEE Trans. Antennas Propagat., vol. 18, pp. 553-556, July1970.[5] T. Satoh, "Dielectric-loaded horn antenna," IEEE Trans. Antennas Propagat., vol. 20,pp. 199-201, March 1972.[6] P. Clarricoats, A. D. Olver, and M. Rizk, "A dielectric loaded conical feed with lowcrosspolar radiation," Proc. URSI Symp. Electromagnetic Theory, Santiago, Spain,pp. 351-354,1983.[7] F. Dubrovka, 0. Krupnov, and Y. Rospopa, "Analysis of partially dielctric loadedcoaxial horn antennas," International Conference on Antenna Theory and Techniques,pp. 229-232,2003.[8] E. Lier, "A dielectric hybrid mode antenna feed: a simple alternative to the corrugatedhorn," IEEE Trans. Antennas Propagat., vol. 34, pp. 21 — 29,1986.[9] T. Wriedt, K. H. Wolff, F. Arndt, and U. Tucholke, "Rigorous hybrid field theoretic designof stepped rectangular waveguide mode converters including the horn transitions intohalf-space," IEEE Trans. Antennas Propagat., vol. 37, pp. 780-790, June 1989.[10] A. K. Bhattacharyya and G. Rollins, "Accurate radiation and impedance characteristics ofhorn antennas-a moment-method model," IEEE Trans. Antennas Propagat., vol. 44,pp. 523-531, April 1996.[11] K. Liu, C. A. Balanis, C. R. Birtcher, and G. C. Barber, "Analysis of pyramidalhorn antennas using moment methods," IEEE Trans. Antennas Propagat., vol. 41,pp. 1379-1389, June 1993.[12] P. J. B. Clarricoats and K. R. Slinn, "Computer solution of waveguide discontinuityproblems," Microwave Symposium Digest, G-MTT International, vol. 67, pp. 23-27,May 1967.85
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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
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12and for the magnetic fieldIn the
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14where * shows complex conjugate.
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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
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tiTo determine the unknown coeffici
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28An electric vector potential F an
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30Using midpoint rule to evaluate i
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32whereGreen function integrals, 4,
Page 48 and 49: 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: The indefinite integrals associated
Page 101 and 102: 87[26] T. Bird and S. Hay, "Mismatc
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Variable permittivity dielectric material loaded stepped-horn antenna

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