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IWR1443: accuracy and range resolution difference

Part Number: IWR1443

Hi There;

We are considering to use TI's sensor chip IWR1443 or equivalent to develop radar level sensor. As we need to achieve the accuracy of +/ - 2 mm. The datasheet of the sensor indicates the accuracy of 1 mm which is of great. Wonder if this 1 mm can be achieved for the measurement of liquid surface over the distance of 40 m. 


Per your technical document of "Fluid-level sensing using 77-GHz millimeter wave" Table 2 on page 7 lists the example chirp configuration for illustrative purpose. The configuration shows the sweep bandwidth of 4000 MHz (which uses the full bandwidth) and the range resolution of 3.75 cm with range of 60 m. Understand the range resolution is kind of accuracy and this is far away from 1 mm as indicated in the datasheet.

My question is if IWR1443 sensor chip could achieve 1 mm or 2 mm measurement accuracy over 40 m distance liquid surface. If yes, please propose the configuration. Otherwise please propose any alternative sensor chip from TI which might satisfy such requirement.

Ap[preciate anyone might help to clarify the matter;

Best Regards,

Jian Xu