We are developing RADAR boards using AWR1443 chips and are in the process of CE certification.
We have failed in the test. (ETSI EN 302 264 4.3.4 Unwanted emissions in the out-of-band domain.)
As shown in the figure below(Figure 1.), the OOB frequency range is F1 ~ fL and fH ~ F2.( Refer to ETSI EN 303 396)
The values fL and fH are the results of the operating frequency range conformance test.
The figure below(Figure 2.) shows the results of a measurement that determined the FL and fH using 99% OBW function.
Eventually, the power was high in FL and fH, resulting in a failure in the OOB range( F1 ~ fL and fH ~ F2).
I think the problem would occur unconditionally, because of the fmcw modulation properties.
If you have any experience with the esi en302 264 test(CE certification, please let me know how to solve this problem.
Figure 1.
Figure 2.
