NAME: _________________________________
Electrical and Computer Engineering
Fall 2014 BREADTH EXAM
Problems 2/3/4
TTG Area: Devices and Circuits
1) An electric flux density in free space is given as
D  8.77 1010 e jkx a y
Obtain the phasor form of H.
ECGR 3121/3122:
Electromagnetic Fields
NAME: _________________________________
2) The electric and magnetic fields of a wave in free space are given as
E  25e j /2e  jky a x  25e  jky a z
25
25
H  e  jky a x  e j /2e  jky a z


Find the time-varying instantaneous Poynting vector associated with this wave.
NAME: _________________________________
3) Find the input impedance and input reflection coefficient of the following circuit:
NAME: _________________________________
Some Useful Equations:
P = E H
D
J
t
Z  jZ o tan(  )
Z in  Z o L
Z o  jZ L tan(  )
 H 
D   o r E
B  o  r H
B
t
 A A 
 A A 
 A A 
  A  ax  z  y   a y  x  z   az  y  x 
z 
x 
y 
 z
 y
 x
 E  