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Unformatted text preview: of phasor.
angle(Ep)*180/pi %Get phase angle of phasor in degrees.
abs(Ep) %Get magnitude of phasor.
%You could also do symbolic manipulation...
syms w t
real( Ep*exp(j*w*t) )
%...but you wouldn’t like the result (try it).
%Plot the phasor in the complex plane.
polar([0 angle(Ep)], [0 abs(Ep)]) 5 2.3 Problem 3 GIVEN
H = x sin(107 πt − 0.2z ) + y cos 107 πt − 0.2z − 5 π
2 2.3.1 Part a FIND
First, for clarity, cos 107 πt − 0.2z − 5 π = cos(107 πt−0.2z ) cos 52 +sin(107 πt−
0.2) sin 52 , and since cos(5π/2) = cos(π/2) = 0, while sin(5π/2) = sin(π/2) =
1, cos 10 πt − 0.2z − 5 π = sin (107 πt − 0.2z ) .
The phase front of the wave is given by the argument of the sinusoidal
functions: 107 πt − 0.02z . This is a forward-propogating wave (increase the
time a little bit, and you have to move forward in the z -direction to catch up...
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- Spring '09