Other Parts Discussed in Thread: IWR6843
Tool/software:
Hi team,
I have a customer with the below inquiry regarding the IWR1843. Let me know what you think and thanks in advance!
"I’ve become aware of a recent revision to the FCC §15.255 regulations governing radar devices in 57-71 GHz range, which is utilized by TI’s industrial radar chips (e.g. IWR6843). I view this regulatory development as largely positive, in that it resolves a number of compliance ambiguities related to a sensor we are developing using your chipset. I know that TI is well-aware of these regulatory changes, having been involved in comments and negotiations leading up to their promulgation.
One key aspect of this new regulatory framework is the splitting (for non-pulsed devices) of the lower part of this band into two regions with distinct radiated power limits. In effect, FMCW applications requiring higher power levels are being pushed down into the 57.0 – 59.4 GHz region, with radiated power levels up through 61.56 GHz significantly limited in comparison. (This appears to be an attempt to protect emerging applications such as in-cabin occupant monitoring and personal-area networks.) This new band partitioning renders much of the available transmit power of the IWR6843 unusable because the chip is only specified down to 60 GHz. The difference in allowed TX power is +3 dBm vs +20 dBm EIRP (with your chip having 12 dBm of TX power available). Obviously, this is a significant limitation.
My question is: Can the IWR6843 be re-characterized for use below 60 GHz? If this is not feasible, can you share your plans for a variant of this chip that will work in the 57 – 60 GHz range?"
Marco
