APPROVAL PAGEVARIABLE PERMITTIVITY DIELECTRIC MATERIAL LOADEDSTEPPED-HORN ANTENNAÖzgür ÖzdemirDr. Edip Niver, Dissertation AdvisorAssociate Professor of Electrical and Computer Engineering, NJITDate7 or.Dr. Gerald Whitman, Committee Member DateProfessor of Electrical and Computer Engineering, NJITDr. Haiebel, Try4 Committee MemberDateProfess of Electrical and Computer Engineering, NJITIDr. Koray E. Akdogan , Committee MemberResearch Faculty of Ceramic and Materials Engineering, Rutgers UniversityDateDr. Ken Chin, Committee MemberProfessor of Physics, NJITDate
BIOGRAPHICAL SKETCHAuthor: Özgür ÖzdemirDegree: Doctor of PhilosophyDate: August 2005Undergraduate and Graduate Education:• Doctor of Philosophy in Electrical Engineering,New Jersey Institute of Technology, Newark, NJ, 2005• Master of Engineering in Electrical Engineering,Istanbul Technical University, Istanbul, Turkey, 2000• Bachelor of Engineering in Electrical Engineering,Istanbul Technical University, Istanbul, Turkey, 1998Major: Electrical EngineeringPresentations and Publications:Ozgur Ozdemir, Edip Niver, Koray E. Akdogan, Ahmad Safari, "Horn Antenna Loadedwith Graded Index Dielectric Material," 2004 China-Japan Joint Meeting onMicrowaves, Harbin, P. R. China, 2004Ozgur Ozdemir, Edip Niver, Koray E. Akdogan, Ahmad Safari, "Loading Stepped Hornwith <strong>Variable</strong> Permittivity Dielectric Material," Accepted for publication inMediterranean Microwave Symposium 2005, Athens, Greece, 2005iv
- Page 1 and 2: Copyright Warning & RestrictionsThe
- Page 4 and 5: VARIABLE PERMITTIVITY DIELECTRIC MA
- Page 8 and 9: To my parents, ..Tahsin and Güler
- Page 10 and 11: TABLE OF CONTENTSChapterPage1 INTRO
- Page 12 and 13: LIST OF FIGURESFigurePage2.1 Geomet
- Page 14 and 15: FigureLIST OF FIGURES(Continued)Pag
- Page 16 and 17: 2field uniformity and this results
- Page 18 and 19: 4from improving the gain, dielectri
- Page 20 and 21: Figure 2.1 Geometry of pyramidal a
- Page 22 and 23: 84Figure 2.4 Step discontinuity bet
- Page 24 and 25: 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
- Page 32 and 33: 18Figure 2.6 Generalized reflection
- Page 34 and 35: 20aperture region and 11Ps is the m
- Page 36 and 37: 22where T; (x) and T: (y) are trian
- Page 38 and 39: 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,
- 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 and 98:
The indefinite integrals associated
- Page 99 and 100:
BIBLIOGRAPHY[1] P. Clarricoats, A.
- Page 101 and 102:
87[26] T. Bird and S. Hay, "Mismatc