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IWR6843: Increasing the detection range?

Brian Angiel
Expert 4110 points
Part Number: IWR6843
Other Parts Discussed in Thread: IWR1642

I'm curious to learn about how to increase the detection range of the IWR6843, given the atmospheric attenuation at 60 GHz v.s. the IWR1642 detection range at 80GHz.

Is the best approach from a cost-benefit standpoint for increasing detection range to either increase the number or size of the Tx and RX antennas, or increase the gain of the RFPA, or is it processing gain through chirp memory or a combination of all?

Also, do you know of any amplifiers that are available to use with the IWR6843 to increase the TX power levels to overcome the Oxygen absorption rates?

Thanks,

Brian

  • 0
    TI__Expert 4025 points

    Hi Brian,

    The IWR6843EVM and IWR1642EVM operate in two different frequency bands.  The IWR6843EVM operates between 60-64GHz and the IWR1642 operates between 76-81GHz.  There is greater attenuation at higher frequency, so the IWR1642EVM has a shorter range than the IWR6843.

    Here's an app note that describes the effects of changing chirp parameters. I also recommend taking a look at the mmWave sensing estimator look at the trade-offs in the configurations that affect distance. I would recommend looking into these configurations before starting a new antenna design. 

    I do not know of any amplifiers to increase Tx power.

    -Chloe