2.3.7 Waveguide 19
2.3.8 Antenna Aperture Body 20
2.3.9 Antenna Feed 20
2.4 Background of Horn Antenna
21 2.4.1 Horn Antenna Features
22 2.5
Paper Review 23
2.6 Historical Overview
24 2.6. 2.6.1Conventional Dual-Ridged Horn Drawbacks
25
III METHODOLOGY
3.1 Introduction
28
3.2 Methodology
29 3.3
Designing and Simulations through CST 30
3.3.1 Design Specification 31
3.3.2 Design Process 31
3.4 Antenna Configuration
35 3.4.1 Design of the Quadruple-Ridged Waveguide
35 3.4.2 Technique for Tapering the Quad-Ridged in the
Horn 37
3.4.3 Quad-Ridged Horn Antenna Design 38
3.5 Antenna Simulation
39 3.6
Antenna Fabrication Process 41
3.7 Antenna Measurement Process
41
IV RESULT AND DISCUSSION
4.1 Introduction
44 4.2
Quad-Ridged Horn Antenna Design and Analysis 45
4.3 Simulation and Analysis of the Results
47 4.3.1 Horn Antenna Design
48 4.3.2 Simulation and Measurement o f Return Loss, S
11
51 4.3.3 Simulation of Directivity
52 4.3.4 Simulation of Radiation Pattern
53 4.3.5 Simulation of and Measurement of Gain
54
V CONCLUSION AND SUGGESTION
5.1 Conclusion
56 5.2
Recommendation on Future Work 58
REFERENCES 61
APPENDIX A 72
LIST OF TABLES
NO. TITLE
PAGE
3.1 Design Specification of the Antenna
31 3.2
Parameter Antenna Design 39
3.3 Setting in CST Studio Suite Software
40 4.1
Comparison between
Simulation and
Measurement Antenna Design
49
4.2 Comparison between the Quad-Ridged Horn Antenna Designs
Using CST Software and Antenna Design after Fabrication 50
LIST OF FIGURES
NO. TITLE
PAGE
1.1 Flow Chart of Methodology
7 2.1
Magnetic Fields and Electric Field Produced by RF
Signals
11
2.2 Antenna as a Transitional Structure
11 2.3
Antenna Analysis of a Coordinate System 13
2.4 A Pyramidal Horn Antenna of Principal E- and H-Plane
Patterns 14
2.5 Polar Plot of Antenna Radiation Pattern
15 2.6
Cartesian Plot of Antenna Radiation Pattern 15
2.7 Radiation of Rectangular Waveguide
19 2.8
Monopole Feed into Waveguide 19
2.9 E-Plane Horn
21 2.10
H-Plane Horn 21
2.11 Rectangular Horn
22 2.12
1-18GHz Antenna Model with Transparent Flares 26
2.13 Model of Dual-Ridged Horn Antenna Feeding Section
