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CC2340R5-Q1: How to design antenna to get higher performence in Channel sounding

QL
Prodigy 130 points
Part Number: CC2340R5-Q1

Hi Ti team,

    We will develop a blutooth board for Channel Sounding Solution and we want to ask you to get more relationship between Antenna design and Performence of Channel Sounding location.

    I search the internet, but I could not get more information, Could you provide us more imformation about if Good Antenna design can improve the precision of Location by Channel Sound?

And about Muti-Antenna design for Channel sounding? 

    Best Regards,

    Annie

  • +1
    TI__Expert 3610 points

    Hi Anni,

    Currently, we do not have any reference designs for channel sounding. If you plan to use 1 antenna, just follow our reference design for CC2340 LP.

    Our recommendation for channel sounding board is to have two antennas. If you are planning to have two antenna, we do have some guidelines which I have listed below. Keep in mind that we are also working on this at the moment and have not completely evaluated what works best for channel sounding. 

    1. Have 31.1 mm distance between the two antennas this is the quarter wave for 2.4GHz signal. The antennas should also see at least 31.1 mm of ground plane.

    2. Place the two antenna 90 degrees to each other to cover both polarizations.

    3. The routing to the antennas should be as symmetrical as possible as channel sounding is a phase-based measurement.

    4. Our recommendation at moment is to use inverted-F antennas. For more detail on this antenna design refer to https://www.ti.com/lit/an/swru120d/swru120d.pdf.

    Everything else should follow general RF guidelines that are mentioned in https://www.ti.com/lit/an/swra640g/swra640g.pdf.

    Regards,

    HG