Antenna arrangements for measurement of angle of arrival over 360 degrees

A system for determining an angle of arrival (AoA) of a radio frequency (RF) signal received at an antenna array, the system comprising:

• an antenna array having at least a first antenna pair and a second antenna pair, the antenna array being configured to receive an RF signal at each pair of antennas of the antenna array, 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;
• a combining block configured to combine 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;
• at least one memory device with computer-executable instructions stored thereon;
• and
• at least one processor for executing the computer-executable instructions stored on the at least one memory device, wherein execution of the computer-executable instructions by the at least one processor causes the at least one processor to perform operations 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;
• generating an AoA look-up table for the antenna array based on a plurality of theoretical signals;
• 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.