Presentation is loading. Please wait.

Presentation is loading. Please wait.

EMLAB 1 Plane wave reflection and transmission. EMLAB 2 Reflection of uniform plane waves at normal incidence.

Similar presentations


Presentation on theme: "EMLAB 1 Plane wave reflection and transmission. EMLAB 2 Reflection of uniform plane waves at normal incidence."— Presentation transcript:

1 EMLAB 1 Plane wave reflection and transmission

2 EMLAB 2 Reflection of uniform plane waves at normal incidence

3 EMLAB 3 Boundary conditions (at the interface, z =0)

4 EMLAB 4 Reflection from perfect electric conductor (at the interface, z =0)

5 EMLAB 5 Example

6 EMLAB 6

7 7 Wave reflection from multiple interfaces

8 EMLAB 8 Example : radome Reflection Transmission

9 EMLAB 9 Example : anti-reflection coating Calculate the refractive index and minimum thickness for the glass coating to provide total transmission from air to the glass at a free space wavelength of 570nm. refractive index of the glass is n 3 =1.45. (n: refractive index)

10 EMLAB 10 Plane wave refraction at oblique incidence angles

11 EMLAB 11 Plane of incidence

12 EMLAB 12 s-polarization (perpendicular) p-polarization (parallel) If an EM wave approaches a surface obliquely, it is easier to decompose the field into two components, s-polarization and p-polarization.

13 EMLAB 13 p-polarization (E-field parallel to the plane of incidence)

14 EMLAB 14 E-field tangential component continuity

15 EMLAB 15 phase matching condition (Snells law)

16 EMLAB 16 H-field tangential component continuity

17 EMLAB 17

18 EMLAB 18 Reflection coefficient for parallel polarization

19 EMLAB 19 Reflection coefficient for perpendicular polarization (s)

20 EMLAB 20 Example

21 EMLAB 21

22 EMLAB 22

23 EMLAB 23 Total reflection

24 EMLAB 24 Optical fiber

25 EMLAB 25 TV antenna TV signal transmitting antenna TV signals are transmitted as EM wave with horizontal polarization. Wave propagation

26 EMLAB 26 Polarization of EM waves Source current

27 EMLAB 27 Reflection from ionosphere

28 EMLAB 28 Reflection from ground and troposphere EM waves undergo reflections and diffractions while propagating toward receivers.

29 EMLAB 29 2-Ray Ground Reflection For d>> h r, h t, –low angle of incidence allows the earth to act as a reflector –the reflected signal is 180 out of phase –P r 1/d 4 R T htht hrhr Phase shift! d

30 EMLAB 30

31 EMLAB 31


Download ppt "EMLAB 1 Plane wave reflection and transmission. EMLAB 2 Reflection of uniform plane waves at normal incidence."

Similar presentations


Ads by Google