Patent ID: 9741542
Date: 2017-08-22
CPC Classifications: F02P,H01J,H05H,Y02T

Claim:
1. A plasma generating device including an electromagnetic wave generating device that oscillates electromagnetic waves and an emission antenna that emits the electromagnetic waves oscillated from the electromagnetic wave generating device, an electromagnetic wave emission device having the emission antenna, and a control device that controls the electromagnetic wave emission device, wherein the electromagnetic wave emission device comprises an electric power detector that detects a progressive wave electric power outputted from the electromagnetic wave generating device and a reflective wave electric power reflected from the emission antenna, and the control device determines, in view of a ratio of the reflective wave electric power to the progressive wave electric power, whether a plasma exists, and controls an oscillation pattern of the electromagnetic waves such that when the plasma exists the oscillation pattern of the electromagnetic waves is set according to the ratio, and when no plasma exists output of the electromagnetic waves is suspended for a predetermined time.