US 12,463,339 B2
Phased array antenna calibration method and phased array antenna calibration system
Takashi Maruyama, Tokyo (JP); Shigeo Udagawa, Tokyo (JP); Mitsuru Kirita, Tokyo (JP); Tai Tanaka, Tokyo (JP); and Ryotaro Ohashi, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/025,644
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Sep. 30, 2020, PCT No. PCT/JP2020/037312
§ 371(c)(1), (2) Date Mar. 10, 2023,
PCT Pub. No. WO2022/070355, PCT Pub. Date Apr. 7, 2022.
Prior Publication US 2023/0361463 A1, Nov. 9, 2023
Int. Cl. H01Q 3/26 (2006.01); H01Q 3/36 (2006.01)
CPC H01Q 3/267 (2013.01) [H01Q 3/36 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A phased array antenna calibration method for a phased array antenna including a plurality of transmission modules and a reception module, the plurality of transmission modules each including a phase shifter that changes a phase of a high frequency signal output from a signal source, an amplifier that amplifies an amplitude of the high frequency signal, and a transmission antenna that converts the high frequency signal into a radio wave, the reception module including a reception antenna, the phased array antenna calibration method comprising:
receiving, by the reception antenna, a reflected wave that is a radio wave transmitted from the transmission antenna of each of the plurality of transmission modules and reflected outside the phased array antenna;
measuring a first phase difference in the reflected wave in a state that the reflector is placed at a first position; and
adjusting the phase shifter and the amplifier of each of the plurality of transmission modules based on an amplitude and a phase of the reflected wave received, wherein
the adjusting is performed based on the first phase difference in such a manner that a second phase difference caused by a geometric relationship among the transmission antennas, a reflector, and the reception antenna is removed from a phase of the reflected wave in a state that the reflector is placed at a second position nearer to the phased array antenna than the first position.