Method and apparatus for load impedance-aware effective isotropic radiated power (EIRP) calibration in FR2 phased array transmitters

A method comprising:

• determining, for each of a plurality of emulated reflection coefficients at a bi-directional coupler of an antenna path, a first signal corresponding to a first forward signal provided from the bi-directional coupler to an antenna of the antenna path, and a second signal corresponding to a first reverse signal reflected back to the bi-directional coupler from the antenna, wherein an input signal is maintained for each of the plurality of emulated reflection coefficients;
• measuring, for each of the plurality of emulated reflection coefficients, a first power based on the first signal and the second signal;
• determining, for each of the plurality of emulated reflection coefficients, a second power delivered to the antenna based on a respective reflection coefficient;
• determining, for each of the plurality of emulated reflection coefficients, a respective power correction value based on the first power and the second power;
• and
• generating a look-up table correlating the respective reflection coefficient, a first ratio of the first signal to the second signal, and the respective power correction value, for each of the plurality of emulated reflection coefficients.

A user equipment (UE) comprising:

• a phased array with each antenna path comprising an antenna, a bi-directional coupler, and a power detector;
• a processor;
• and
• a non-transitory computer readable storage medium storing instructions that, when executed, cause the processor to:
• for each antenna path:
• receive a first signal at the bi-directional coupler;
• measure, at the power detector, a first power delivered to the antenna, based on a second signal corresponding to a forward signal provided from the bi-directional coupler to the antenna and a third signal corresponding to a reverse signal reflected back to the bi-directional coupler from the antenna;
• determine a power correction value based on a ratio of the second signal to the third signal and a one-to-one relationship of the ratio with a load reflection coefficient of the antenna;
• and
• determine a second power delivered to the antenna based on the first power and the power correction value;
• sum determined powers from each antenna path;
• and
• determine an effective isotropic radiation power (EIRP) for the phased array based on the summed powers and an antenna gain for the phased array.