US 12,255,406 B2
System and method for over-the-air antenna calibration
Ersin Yetisir, Redmond, WA (US)
Assigned to Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed by Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed on Sep. 6, 2023, as Appl. No. 18/242,994.
Application 18/242,994 is a continuation of application No. 17/946,978, filed on Sep. 16, 2022, granted, now 11,784,408.
Application 17/946,978 is a continuation of application No. 17/367,175, filed on Jul. 2, 2021, granted, now 11,489,252, issued on Nov. 1, 2022.
Claims priority of provisional application 63/063,209, filed on Aug. 7, 2020.
Claims priority of provisional application 63/048,174, filed on Jul. 5, 2020.
Prior Publication US 2024/0072435 A1, Feb. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01Q 3/26 (2006.01); H01Q 1/48 (2006.01); H01Q 9/04 (2006.01); H01Q 21/06 (2006.01); H04B 17/11 (2015.01); H04B 17/12 (2015.01)
CPC H01Q 3/267 (2013.01) [H01Q 1/48 (2013.01); H01Q 9/0414 (2013.01); H01Q 9/045 (2013.01); H01Q 21/065 (2013.01); H04B 17/12 (2015.01)] 20 Claims
OG exemplary drawing
 
1. An antenna calibration system for a phased array antenna, the antenna calibration system comprising:
a beamformer corresponding to a subset of antenna cells of a plurality of antenna cells, wherein the beamformer includes a calibration section for comparing a reference signal to a non-reference signal; and
a first operating antenna within the subset of antenna cells corresponding with the beamformer, wherein the first operating antenna is configured to deliver a first reference signal (mTx) from the beamformer to be received by a second operating antenna for comparison with a first non-reference signal (Rx) in the beamformer.