1 Advanced Engineering Electromagnetics 13 113 3 1

$목차 2 • Chapter 13 – Geometrical Theory of Diffraction (GTD) – 13. 2$

9 – 평면파의 Eikonal Surface는 평면이며 진행방향에 대해 수직이다 – 원통파의 Eikonal Surface는 cylindrical

10 • 13. 2. 1 Amplitude Relation – Radiation density S at s, cross-sectional

17 • Field phase at reference point (s=0) Field amplitude at reference point (s=0)

19 • PEC 2021 -03 -08 오후 9: 13: 18 EMLAB

22 • Reflection Coefficient Phase factor Spatial attenuation (spreading factor) 2021 -03 -08 오후

32 • Example 13 -2 – PEC strip 위에 infinite line source가 존재할 때의

34 • Ⅰ Ⅱ 2021 -03 -08 오후 9: 13: 35 Ⅲ EMLAB

35 Strip 위의 전류원의 Amplitude radiation pattern 2021 -03 -08 오후 9: 13: 36

$13. 3 Geometrical Theory of Diffraction 37 • 2021 -03 -08 오후 9: 13:$

$39 • Diffraction Coefficient Spatial attenuation Phase factor (spreading factor) 2021 -03 -08 오후$

THE END 2021 -03 -08 오후 9: 13: 42 41 EMLAB

42 Eikonal Equation의 증명 • 2021 -03 -08 오후 9: 13: 43 EMLAB

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1 Advanced Engineering Electromagnetics 13. 1~13. 3. 1 2017. 7. 14 2021 -03 -08 오후 9: 13: 03 EMLAB

$목차 2 • Chapter 13 – Geometrical Theory of Diffraction (GTD) – 13. 2$

목차 2 • Chapter 13 – Geometrical Theory of Diffraction (GTD) – 13. 2 Geometrical Optics • • • 13. 2. 1 Amplitude Relation 13. 2. 2 Phase and polarization Relations 13. 2. 3 Reflection from Surfaces Example 13 -1 Plane Wave Scattering from a PEC Sphere Example 13 -2 Reflection From a Flat PEC Surface – 13. 3 Geometrical Theory of Diffraction: Edge Diffraction • 13. 3. 1 Amplitude, Phase, and Polarization Relations 2021 -03 -08 오후 9: 13: 04 EMLAB

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9 – 평면파의 Eikonal Surface는 평면이며 진행방향에 대해 수직이다 – 원통파의 Eikonal Surface는 cylindrical surface이며 ρ방향에 대해 수직이다 – 구면파의 Eikonal Surface는 spherical surface 이며 r방향에 대해 수직이다 Cylindrical waves Plane waves Spherical waves 2021 -03 -08 오후 9: 13: 08 EMLAB

10 • 13. 2. 1 Amplitude Relation – Radiation density S at s, cross-sectional areas d. A 2021 -03 -08 오후 9: 13: 08 EMLAB

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17 • Field phase at reference point (s=0) Field amplitude at reference point (s=0) Field at reference point (s=0) Spatial attenuation (spreading factor) 2021 -03 -08 오후 9: 13: 17 Phase factor EMLAB

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19 • PEC 2021 -03 -08 오후 9: 13: 18 EMLAB

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22 • Reflection Coefficient Phase factor Spatial attenuation (spreading factor) 2021 -03 -08 오후 9: 13: 22 EMLAB

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32 • Example 13 -2 – PEC strip 위에 infinite line source가 존재할 때의 반사파 (h=0. 5λ, w=∞ and w=2λ) Ⅰ Ⅰ Ⅱ Ⅱ Ⅲ Ⅲ – Line source로 인한 입사파 – Far-field를 위한 2종 0차 Hankel Function의 large argument 근사 2021 -03 -08 오후 9: 13: 33 EMLAB