DOC《电子科技大学》

1 Introduction

1 1.1 Research Background and Significance

1 1.2 State of Arts

1 1.3 Contents and Innovations of the Thesis

2 1.4 Outline of the Thesis

2 Chapter

2 Theoretical Basics

3 2.1 Integral Equations in Electromagnetics

3 2.2

270 MHz Plan Wave Excitation

3 2.3 The Solution of Integral Equations in Electromagnetics

4 2.3.1 General Principle of the Method of Moments

4 2.3.2 Geometrical Modeling and Discretization of Object

4 2.3.2.1 Planar Triangular Model

4 2.3.2.2 Curvilinear Triangular Model

4 2.3.3 The Choice of Basis Functions

5 2.3.3.1 Planar RWG Basis Functions

5 2.3.3.2 Curvilinear RWG Basis Functions

6 2.3.4 The Solution of Matrix Equations

6 2.3.4.1 Direct Algorithms

6 2.3.4.2 Iterative Algorithms

6 2.4 Conclusion

6 Chapter

3 Calder?n Preconditioner at Mid Frequencies

7 3.1 Introduction

7 3.2 Calder?n Relation and Calder?n Identities

7 3.3 Calder?n Preconditioner at Mid Frequencies

7 3.4 Numerical Examples

7 3.5 Conclusion

7 Chapter

4 Calder?n Preconditioning Technique for N-Müller

8 4.1 Introduction

8 4.2 N-Müller Integral Equations

8 4.3 The Derivation of N-Müller Equations

8 4.4 The Discretization of N-Müller Equations

8 4.5 Numerical Examples

8 4.6 Conclusion

8 Chapter

5 Conclusions

9 5.1 Concluding Remarks

9 5.2 Future Work

9 Acknowledgements

10 References

11 Research Results Obtained During the Study for Master Degree

12 Chapter

1 Introduction 1.1 Research Background and Significance Integral-equation-based numerical methods combined with fast algorithms are capable of solving electromagnetic problems of complex structures and material properties with a good accuracy and a high efficiency. They are widely used in a variety of engineering applications, such as the efficient analysis of three dimensional radar scattering problems, the sim........