| ABSTRACT | 第5-6页 |
| 摘要 | 第7-17页 |
| CHAPTER 1 INTRODUCTION | 第17-25页 |
| 1.1 Introduction | 第17页 |
| 1.2 Dielectric rod antennas | 第17-21页 |
| 1.3 Current Situation of the Project | 第21-22页 |
| 1.4 Organization of the Dissertation | 第22-25页 |
| CHAPTER 2 THEORY OFDIELECTRIC ROD ANTENNA | 第25-41页 |
| 2.1 Introduction | 第25页 |
| 2.2 Working Principle | 第25页 |
| 2.3 Mechanism of Radiation Patterns | 第25-26页 |
| 2.4 The Purpose of the Tapering Structure | 第26页 |
| 2.5 Maximum Gain Point | 第26-28页 |
| 2.5.1 Electric Field Distribution along the Dielectric Rod | 第26-27页 |
| 2.5.2 Hassan-Wood Yard Condition for Flat Field Distribution | 第27页 |
| 2.5.3 Design for 100% Excitation Efficiency | 第27页 |
| 2.5.4 Ehrenspeck and Pohler: Yagi- Udawithout Feed Tapered | 第27-28页 |
| 2.6 The Practical Design | 第28-29页 |
| 2.7 The Feeding Structure of the Rod | 第29-31页 |
| 2.8 Measurements | 第31-32页 |
| 2.9 Results and Discussion | 第32-35页 |
| 2.10 Gain Enhancement of Microstrip Antennas | 第35页 |
| 2.11 Short Backfire Antenna | 第35-37页 |
| 2.12 Microstrip Antennas withDielectric Cover | 第37页 |
| 2.13 Microstrip Antennas Gain Improvement with T-lines Analogy | 第37-38页 |
| 2.14 Gain Enhancement of Microstrip Patch Antennas | 第38-39页 |
| 2.15 Chapter Summery | 第39-41页 |
| CHAPTER 3 A NOVEL INTEGRATED OF YAGI-UDA AND DIELECTRIC ROD ANTENNA WITH LOW SIDE LOBE LEVEL | 第41-55页 |
| 3.1 Printed Yagi UdaAntenna | 第41页 |
| 3.2 Theoretical Analysis of Integrated of Printed Yagi and Dielectric rod antenna | 第41-43页 |
| 3.3 Influence of Dielectric Coveronthe EffectivePermittivity | 第43-44页 |
| 3.4 Input Impedance of Typical Yagi Antenna | 第44-45页 |
| 3.4.1 Reflection Coefficient and Return Loss of Typical Yagi Antenna | 第44-45页 |
| 3.5 Simulated Return Loss of Printed Yagi with Dielectric Cover | 第45-46页 |
| 3.6 Shift of resonance frequency with different substrate of Yagi | 第46页 |
| 3.7 Radiation pattern of a typical Yagi antenna | 第46-47页 |
| 3.8 Antenna Gain | 第47-48页 |
| 3.8.1 Gain of Dipole Antenna | 第47-48页 |
| 3.8.2 Gain of Printed Yagi antenna | 第48页 |
| 3.9 Gain of Printed Yagi antenna with dielectric cover | 第48-49页 |
| 3.10 Effect of the length of Yagi on directivity of the proposed structure | 第49-50页 |
| 3.11 Radiation Pattern withTapered Dielectric Cover | 第50-52页 |
| 3.12 Chapter Summery | 第52-55页 |
| CHAPTER 4 ANALYSIS OF PERIODIC SURFACE | 第55-61页 |
| 4.1 Theory of Dielectric Rod Grating | 第55-56页 |
| 4.2 Different Shapes of Periodic Surface | 第56-58页 |
| 4.3 Effect of ratio h/t | 第58-59页 |
| 4.4 Simulated Radiation pattern of whole structure | 第59-60页 |
| 4.5 Chapter Summery | 第60-61页 |
| CHAPTER 5 DESIGN PARAMETERS AND SIMULATED RESULTS | 第61-81页 |
| 5.1 Design Parameter of Printed Yagi | 第61-63页 |
| 5.2 Simulated Return Loss and RadiationPatterns of Yagi with Reflector | 第63-65页 |
| 5.3 Design parameters of dielectric cover with periodic surface of rod | 第65-67页 |
| 5.4 Simulated return loss and radiation pattern of IYDRA | 第67-71页 |
| 5.5 Performance Comparison of IYDRA with conventional SameLength dielectric rod antenna | 第71-72页 |
| 5.5.1 Radiation pattern comparison of IYDRA and Yagi antenna | 第71页 |
| 5.5.2 Radiation pattern comparison of same length IYDRA and Dielectric rod antenna | 第71-72页 |
| 5.6 Fabrications steps | 第72-74页 |
| 5.6.1 Fabrication and fixing of Yagi with its bottom disc reflector | 第73页 |
| 5.6.2 Fabrication and fixing of whole structure of IYDRA | 第73-74页 |
| 5.7 Measurement | 第74-79页 |
| 5.7.1 Return loss measurement | 第74页 |
| 5.7.2 Network Analyzer | 第74-76页 |
| 5.7.3 Radiation pattern measurement | 第76-79页 |
| 5.8 Chapter Summery | 第79-81页 |
| CHAPTER 6 DESIGN EXAMPLE FOR CIRCULAR POLARIZATION | 第81-91页 |
| 6.0 Introduction | 第81-82页 |
| 6.1 Helix Antenna | 第82-83页 |
| 6.1.1 Axial Mode | 第82-83页 |
| 6.2 Design Parameters for Circular polarization | 第83-84页 |
| 6.3 Simulated Results for circular polarization | 第84-87页 |
| 6.4 Comparison of Yagi and Helix feeding | 第87-89页 |
| 6.4.1 Band width comparison with helix and Yagi feeding | 第87-88页 |
| 6.4.2 Radiation patterns comparison with the helix and Yagi feeding | 第88-89页 |
| 6.6 Chapter Summery | 第89-91页 |
| CHAPTER 7 A NOVEL EMBEDDED HELIX DIELECTRIC ROD ANTENNAFOR HIGH GAIN AND LOW SIDE LOBE LEVELS | 第91-107页 |
| 7.1 Introduction | 第91-92页 |
| 7.2 Theoretical Analysis | 第92-97页 |
| 7.2.1 First Part | 第93-96页 |
| 7.2.2 Second Part | 第96-97页 |
| 7.2.3 Third Part | 第97页 |
| 7.4 Fabrication and Measurement | 第97-103页 |
| 7.5 Fabrication Steps | 第103-106页 |
| 7.6 Chapter Summery | 第106-107页 |
| CHAPTER 8 CONCLUSION AND FUTURE PROSPECTIVE | 第107-109页 |
| 8.1 Conclusion | 第107页 |
| 8.2 Future Perspective | 第107-109页 |
| REFERENCES | 第109-113页 |
| LIST OF PUBLICATIONS | 第113-115页 |
| ACKNOWLEDGEMENTS | 第115页 |
