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Page 21 of 28
M21200-0de-ID-B.doc
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L I S H
Table 4 Inductance and initial values of the resonance capacitances for a quadratic antenna
s= [cm]
L
P
[uH]
C
res
[pF]
C
2,1
= C
2,2
[pF]
C
1
[pF]
25
0,542
254,2
300
160
30
0,693
199,1
253
147
35
0,850
162,3
220
109
40
1,012
136,2
180
84
45
1,180
116,8
155
75
50
1,352
102,0
125
62
55
1,529
90,2
115
61
60
1,709
80,7
100
48
65
1,892
72,9
75
47
70
2,078
66,4
69
46
75
2,267
60,8
66
45
80
2,459
56,1
62
38
85
2,653
52,0
55
37
90
2,850
48,4
47
36
95
3,049
45,2
43
30
100
3,250
42,4
37
22
s: Side length of the square
For rectangular antennas, use the value from Table 1 which comes closest to a square antenna
(nearly the same conductor length). For an antenna size of 60 x 80 cm, for example, use the
values for a 70 x 70 cm antenna.
For other antenna shapes measure the inductance of the antenna conductor and then find the
closest appropriate value from Table 1.
The figures refer to a conductor of 1 cm diameter (e.g., RG213) and a resistance R
R
of 2 Ohms.
