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CC2640: Two antenna

Part Number: CC2640

The data sheet shows an two antenna solution. However, the chipset is made for other radio types than BLE. Therefore we want to know if the two antenna solution can be used for BLE specific .

 

1)Can the two-antenna solution be used for BLE?

2)Does it make sense to use this for BLE?

3)Is the two-antenna solution supported to BLE SW?

4)How does the two-antenna solution works? Is it antenna divergence based on RSSI measurements?

BR

Anders Lange

  • Hi,

    The two antenna solution can be used by all PHYs and the main advantage is the link margin can be improved for a reliable link. With multi-path propagation, the RSSI can vary up to 10 dB within a square meter. With a two antenna solution, if the DUT is placed in a null position, then the antenna can be switched so the null is avoided or minimized.

    When calculating range, with no antenna diversity I usually calculate with a link margin of 16 dB and with antenna diversity this can be reduced to 10 dB.

    Antenna diversity is usually based upon RSSI and LQI. 

    Regards,

       Richard

  • Could you please answer on the 4 questions in the earlier post:
    1)Can the two-antenna solution be used for BLE?

    2)Does it make sense to use this for BLE?

    3)Is the two-antenna solution supported to BLE SW?

    4)How does the two-antenna solution works? Is it antenna divergence based on RSSI measurements?

    I do not see any answer on question 3...

    BR
    Anders
  • Hello Anders,
    Please refer to this thread:
    e2e.ti.com/.../2565034