Hello,
I have measured IQ imbalance of the AWR1243 receiver chain in Continuous mode.
The IMRR is very flat across the IF bandwidth, but varies by about 6-7 dB when going from 76 to 81 GHz LO Frequency. The best performance I measured was ~ 27 dB at 76 GHz, and then at 80-81 GHz it dropped to ~ 19 dB. The IMRR get worse monotonically as LO frequency is increased.
This may be the combination of varying amplitude and phase imbalance across different frequencies. I was under the assumption that this is part of calibration so may be the performance will be comparable across the LO.
Thanks
RJ
