US 12,452,798 B2
Rf energy radiation device
Shinji Takano, Kyoto (JP); Takashi Uno, Shiga (JP); Mikio Fukui, Shiga (JP); and Chikako Hosokawa, Shiga (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/261,272
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 15, 2022, PCT No. PCT/JP2022/005979
§ 371(c)(1), (2) Date Jul. 13, 2023,
PCT Pub. No. WO2022/176857, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 2021-024908 (JP), filed on Feb. 19, 2021.
Prior Publication US 2024/0073829 A1, Feb. 29, 2024
Int. Cl. H04W 52/30 (2009.01); H04W 52/08 (2009.01); H04W 52/10 (2009.01)
CPC H04W 52/30 (2013.01) [H04W 52/08 (2013.01); H04W 52/10 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A radio frequency energy radiation device comprising:
an oscillator configured to generate a radio frequency signal;
a power amplifier configured to amplify the radio frequency signal to output radio frequency power;
a radiation element configured to radiate the radio frequency power;
a detector configured to detect the radio frequency power travelling toward the radiation element as progressive wave power; and
a controller configured to perform an output control of the radio frequency power using a closed-loop control that sets an output set value of the radio frequency power by a closed-loop and an open-loop control that sets the output set value of the radio frequency power by an open-loop,
wherein, in a burst operation alternately switching between a period of outputting the radio frequency power and a period of stopping the radio frequency power, the controller changes the output control of the radio frequency power from the closed-loop control to the open-loop control in a case where a specified condition for change is satisfied during the period of stopping the radio frequency power.