POWER SOURCE DEVICE FOR TRAVELING WAVE TUBE

摘要

PURPOSE:To reduce induced ripples without increasing the capacitor capacity of an output circuit in a power source device for a traveling wave tube. CONSTITUTION:By a transformer 3 driven by a high-frequency inverter 1, the secondary coil 340 of the transformer 3 is connected to a bridge rectification circuit 17 to be adopted as the cathode of a traveling wave tube 43 and a collector power source terminal. The secondary coil 340 of the transformer 3 is also connected to a multistage voltage doubler rectification circuit 45, and one end of output terminal of the circuit 45 is connected to a cathode and the other end is connected to a helix and also an earth 41. A first shield 330 arranged in the inner side of the secondary coil of the transformer 3 and secondary shields 350 and 351 arranged in the vicinity of an iron core facing at the outer side of the secondary coil are connected to the cathode output terminal 29 of the traveling wave tube. Floating electrostatic capacity Cs to the earth from the secondary coil 340 becomes almost zero since these shields 330, 350, and 351 of the secondary coil 340 are connected to the cathode output terminal 29 at a basic electric potential point/ Consequently, the value of high-frequency induced ripples can be reduced.