Patent ID: 11901159
Assignee: HITACHI KOKUSAI ELECTRIC INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC C  H

Claim 0:
1. A radio frequency (RF) generator device for supplying RF powers of different frequencies to multiple antennas disposed in a chamber, the RF generator device comprising:
a plurality of RF generators configured to supply the RF powers of the different frequencies to the multiple antennas; and
a plurality of RF controllers configured to control the RF generators, respectively,
wherein each of the RF controllers includes:
a fast Fourier transformer; and
a filter,
wherein the fast Fourier transformer performs fast Fourier transform on a signal introduced as a reflected wave to decompose the signal into frequency components, and
the filter removes waves having frequency components that are not outputted from the corresponding RF generator.