US 11,862,863 B2
Calibration method and apparatus
Safa Kanan Hadi Salman, Vista, CA (US); Taha Shahvirdi Dizaj Yekan, San Diego, CA (US); Souren Shamsinejad, Carlsbad, CA (US); and Maha Achour, Encinitas, CA (US)
Assigned to Metawave Corporation, Carlsbad, CA (US)
Filed by Metawave Corporation, Carlsbad, CA (US)
Filed on Mar. 25, 2020, as Appl. No. 16/829,803.
Claims priority of provisional application 62/823,562, filed on Mar. 25, 2019.
Prior Publication US 2020/0395663 A1, Dec. 17, 2020
Int. Cl. H01Q 3/26 (2006.01); H01Q 21/22 (2006.01); H04B 17/12 (2015.01); H01Q 3/36 (2006.01); H01Q 21/00 (2006.01)
CPC H01Q 3/267 (2013.01) [H01Q 3/36 (2013.01); H01Q 21/0025 (2013.01); H01Q 21/22 (2013.01); H04B 17/12 (2015.01)] 16 Claims
OG exemplary drawing
 
1. An antenna calibration method for a beam steering radar, comprising:
determining a first set of input voltages for a plurality of phase shifters coupled to a plurality of antenna elements in an antenna array in the beam steering radar, the voltages to control phases of signals for transmission by the antenna array;
applying the first set of input voltages to the antenna array;
measuring radiating signals resulting from the first set of input voltages;
selecting an optimization algorithm from a gradient descent algorithm, a genetic algorithm, or a particle swarm algorithm;
iteratively optimizing voltage and phase values for the plurality of phase shifters to determine voltage and phase value pairs that result in a desired gain for the antenna array; and
storing the voltage and phase value pairs in a look-up-table in the beam steering radar,
wherein iteratively optimizing voltage and phase values comprises applying the first set of input voltages to the antenna array to converge on a maximum gain for a power distribution path from a plurality of power distribution paths in the antenna array.