1. An antenna modeled as a Thevenin equivalent having a voltage 15 cos2103 t and output
Chapter 5
resistance of 50 . Determine the average power delivered to a load resistance of 15 .
Solution:
I
rms
V
rms
I
rms
V
rms
R
0
15
2
R
L
V
10.606 V
0
2
10.606 V 0.163 A
50 15
R
L
0.163
2
I
rms
15 0.399 W.
2
P
av