SPRACV2 November 2020 AWR1843 , AWR2243
The cascade sensor’s inter-channel imbalances can smoothly vary with temperature due to mismatches in temperature-coefficient of delays of the 80-GHz and 20-GHz PCB routings. It is expected that the DSP or the host processor controlling the AWR devices accounts for this using higher layer algorithms (e.g. refining inter-channel imbalance estimates using crude estimates of real-life object directions). There can be similar smooth imbalance drifts due to manufacturing variability in the TX, RX, and LO paths in different devices and can be mitigated by the same algorithms.