Analysis of Resonant Radio-Frequency Coupling Systems

This paper considers resonant coupling circuits useful in coupling RF energy to cyclotron RF resonators. Two specific circuits are considered. In the first circuit, the anode of the RF power tube is connected directly to the coupling loop. In the second, a length of transmission line connects the anode to the coupling loop. Inductive (loop) coupling is assumed for the sake of this presentation. With slight modification, the expressions derived apply equally well to capacitively coupled circuits.