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Select the type of capacitor

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asrock70

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What kind of capacitor used to separate the DC voltage?
Will pass through the capacitor AC sin 0 to 50V, 100W power, frequency over 10MHz.
Considering the use of a parallel combination of 3x 100nF, but do not know whether to use ceramics, Polypropylene?
Same question for the capacitors in the LC LPF on the same AC signal
 

No one really can not cope?
 

you need to clarify your question.
 

100W of power = max?, at voltage of 50V (rms?) = 2A at > 10MHZ, this is a proper transmitting circuit and a very low loss capacitor must be used, a cheap disc ceramic will over heat and burn out. Wound construction capacitors might have a significant series inductance so would add an extra impedance to your circuit. 3 X 100 nF would seem a high value for this sort of frequency. .3MF has a reactance of .05 ohms at 10^7 HZ. Use a 10NF silver mica rated at this current.
Frank
 

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