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Capacitor
selection criteria |
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1) capacitance (pF) |
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2) max voltage (V) |
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3) max reactive power (kVAR) |
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Power flow into capacitor |
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The apparent power flow S into any arbitrary capacitor is |
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P = real power (dissipated in the
capacitor) |
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S = P + jQ = V^ 2 * ω * C * (j
+ DF) |
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Q =reactive power |
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DF = dissipation factor |
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Reactive power in the capacitor |
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Q = V^ 2 * ω * C |
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V = rms RF voltage across the
capacitor |
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ω = 2 * π * f |
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The power dissipated in the
capacitor |
P = V^ 2 * ω * C * (DF) |
f = frequency |
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2) |
1) |
3) |
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C1 |
TX pwr |
f |
Voltage |
Vrms |
Vpeak |
C1/pF |
Q |
DF |
P |
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UR4LL supply |
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Watts |
MHz |
multiplier |
Volts |
Volts |
pF |
kVAr |
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Watts |
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Russian doorknob
capacitors |
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3600 |
3.8 |
10 |
4243 |
6000 |
150 |
64.5 |
0.0015 |
96.7 |
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150pF 10kV 9kVAr |
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2500 |
3.8 |
10 |
3536 |
5000 |
150 |
44.8 |
0.0015 |
67.2 |
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150pF/10kV 75kVAr |
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1600 |
3.8 |
10 |
2828 |
4000 |
150 |
28.7 |
0.0015 |
43.0 |
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150pF 10kV 120kVAr |
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900 |
3.8 |
10 |
2121 |
3000 |
150 |
16.1 |
0.0015 |
24.2 |
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400 |
3.8 |
10 |
1414 |
2000 |
150 |
7.2 |
0.0015 |
10.7 |
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100 |
3.8 |
10 |
707 |
1000 |
150 |
1.8 |
0.0015 |
2.69 |
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10 |
3.8 |
10 |
224 |
316 |
150 |
0.18 |
0.0015 |
0.27 |
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C2 |
TX pwr |
f |
Voltage |
Vrms |
Vpeak |
C1/pF |
Q |
DF |
P |
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Watts |
MHz |
multiplier |
Volts |
Volts |
pF |
kVAr |
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Watts |
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3600 |
3.8 |
3 |
1273 |
1800 |
500 |
19.3 |
0.0015 |
29.0 |
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2500 |
3.8 |
3 |
1061 |
1500 |
500 |
13.4 |
0.0015 |
20.1 |
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1600 |
3.8 |
3 |
849 |
1200 |
500 |
8.6 |
0.0015 |
12.9 |
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900 |
3.8 |
3 |
636 |
900 |
500 |
4.8 |
0.0015 |
7.3 |
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400 |
3.8 |
3 |
424 |
600 |
500 |
2.1 |
0.0015 |
3.2 |
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100 |
3.8 |
3 |
212 |
300 |
500 |
0.54 |
0.0015 |
0.81 |
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10 |
3.8 |
3 |
67 |
95 |
500 |
0.054 |
0.0015 |
0.081 |
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17.10.2010 |
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OH1TV |
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Back |
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