US 12,468,001 B1
Antenna arrangements for measurement of angle of arrival over 360 degrees
Graham K. Smith, Boca Raton, FL (US); Kyle Patrick Kelly, Palm Beach Gardens, FL (US); and Mark Passler, Rockville, MD (US)
Assigned to SR Technologies, Inc., Sunrise, FL (US)
Filed by SR Technologies, Inc., Sunrise, FL (US)
Filed on Jun. 20, 2025, as Appl. No. 19/244,838.
Claims priority of provisional application 63/662,714, filed on Jun. 21, 2024.
Int. Cl. G01S 3/28 (2006.01); H01Q 21/06 (2006.01)
CPC G01S 3/28 (2013.01) [H01Q 21/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining an angle of arrival (AoA) of a radio frequency (RF) signal received at an antenna array, the method comprising:
determining a plurality of theoretical signals to be received at an antenna array having at least a first antenna pair and a second antenna pair, wherein antennas of the first antenna pair are offset from each other by a first offset angle and antennas of the second antenna pair are offset from each other by a second offset angle;
generating an AoA look-up table for the antenna array based on a plurality of theoretical signals;
receiving an RF signal at each pair of antennas of the antenna array;
combining outputs of the antennas in each antenna pair to produce first sum and difference signals for the first antenna pair and second sum and difference signals for the second antenna pair;
calculating a first difference value corresponding to a signal level difference between the first sum signal and the first difference signal;
calculating a second difference value corresponding to a signal level difference between the second sum signal and the second difference signal;
comparing the first and second difference values to theoretical difference values in the AoA look-up table, wherein the theoretical difference values correspond to different AoAs; and
determining a measured AoA of the RF signal based on the comparison of the first and second difference values to the theoretical difference values.