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1.
Which of the following statements are true for signal transmission in a conductor?
BD
A) There exists a skin depth such that all of the wave amplitude is confined within the skin
depth.
B) The Hfield and Efield are generally out of phase.
C) A conductor with a high loss tangent will also have a large skin depth.
D) The skin depth of a conductor is directly proportional to the signal wavelength.
E) The effective resistance of conductors tends decrease with the increase of frequency.
2. You need to make an antireflection coating on a substrate which has an impedance of 2
Ohms, where the incident medium has an impedance of 8 Ohms. Which statement represents
the correct conditions for the impedance and thickness of the coating layer?
BE
A) Impedance=16 Ohms, Thickness=1/4 wavelength in vacuum
B) Impedance=4 Ohms, Thickness=3/4 wavelength in coating
C) Impedance=4 Ohms, Thickness=1/8 wavelength in coating
D) Impedance=4 Ohms, Thickness=1/2 wavelength in vacuum
E)
Impedance=4 Ohms, Thickness=1/4 wavelength in coating
3.
A uniform plane wave is incident from air onto glass (refractive index = 1.45) at an angle
from the normal of 45°. The incident wave is right circularly polarized. It is also known that
the reflection coefficients for the ppolarized and spolarized waves are 0.144 and 0.222,
respectively. Which of the following statements are true?
DE
A) The fraction of power transmitted is 93%.
B) The fraction of power reflected is 36.6%.
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This note was uploaded on 02/14/2011 for the course ECSE 352 taught by Professor Mi during the Fall '10 term at McGill.
 Fall '10
 mi

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