Tool/software:
Hi Team,
We are using AWR2243's Tx1 and Tx2 for elevation angle measurement. After calibration, there is no issue with angle measurement. However, after re-powering, the previously obtained calibration matrix is no longer applicable, and re-calibration is required. Our experiments show that measuring the elevation angle requires two transmitting antennas, and each time the system is powered on again, the phase of the signals transmitted by the two antennas changes, and this change is random. This results in a non-fixed phase difference between the two transmission channels, necessitating re-calibration each time. Re-calibrating each time is impractical. Do you have any suggestions or reference ideas for this issue?
I am referring to the calibration of a single chip due to the inconsistencies between channels caused by manufacturing differences on the PCB and unequal antenna feed line lengths. This is not related to the cascading of chips. These effects are relatively fixed and deterministic, but I need to eliminate these deviations through calibration. I referred to the calibration method from mmwdemo and conducted experiments in an anechoic chamber. Currently, the problem is not that calibration doesn't work, but that calibration needs to be redone each time the system is powered on again.
Regards,
Josel
