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Electromagnetics Engineering
Measured in CIRA RF laboratory by DB Davidson. Note: results in (A) and (B) are in dB.
A) Orientation of maximum magnetic field
Position
S21 in dB
Comment
1
-75
2
-60
3
-70
B) Wavelength (distance between current nodes along the transmission line)
Position (cm from reference point)
0
-
26
-36.5
28
-39.5
4
-35.8
30
-42.0
6
-37.9
32
-41.0
8
-40.2
34
-46.0
10
-39.7
36
-42.1
12
-42.2
38
-35.5
14
-38.0
40
-33.6
16
-36.1
42
-32.2
18
-35.2
44
-31.0
20
-35.0
46
22
-34.5
48
-33.0
24
-32.7
50
-34.0
Coarse plotting of current amplitude
Calculated velocity factor
C) Transmission line terminated in short circuit
Frequency
Zin (real)
Zin (imag)
200 kHz
1.2 W
+j 8.9 W
1st resonance
10.26MHz
770 W
+j 1.5 kW
2nd resonance
31.29MHz
3.1 W
-j 0.4 W
3rd resonance
44.31MHz
2.1 kW
+j 372 W
D) Transmission line terminated in open end
7 kW
-j 8 kW
15.31 MHz
2.9 W
-j 0.1 W
30.64 MHz
620 W
-j 2.8 kW
45.98 MHz
4.3 W
+j 0.4 W
Attachment:- Engineering Electromagnetics.rar
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