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AWR1642BOOST: Antenna Max Gain and Rx gain

Santhana Raj
Expert 1765 points
Part Number: AWR1642BOOST

Hi,

I have doubts on the antenna gain values mentioned across different documents.

1) In AWR1642BOOST datasheet (SWRU508a), on page 12, it is mentioned that "The antenna peak gain is > 9 dBi across the operating frequency band of 76 to 81 GHz."

2)The profile config data structure (rlProfileCfg_t Struct Reference), refers to a variable    "rlUInt16_t rxGain" with values from 24 to 48.

My question is, for what value of rx gain in profile config, will I get 9dBi in my AWR1642BOOST board?

I can see obviously, it is not directly mapped. So, I would like to know the relation between the rx gain value set in profile config and the antenna peak gain that I will get?

Or is this a simple case of Tx gain being 9dBi and my Rx gain being any value between 24 to 48dB. Though this explanation sounds reasonable, I have my doubts because, Sensing estimator allows me to set any Tx gain as I desire.

Thanks in advance,

Santhana Raj

  • 0
    TI__Guru 50240 points
    Hello Santhana,

    I've asked AWR team member to look at this for you. Someone should have an answer for you shortly.


    Cheers,
    Akash
  • 0
    TI__Guru 69220 points
    Hello Santhana,

    1) Antenna peak gain is a function of the antenna design. For the AWR1642BOOST EVM, the antenna gain is 9dBi (for both the Tx antenna and the Rx antenna). It cannot be increased without redesigning the antennas.

    2) The rxGain is the receiver gain that can be programmed in the device. Changing the rxGain, changes settings in the RF and IF sections to vary the gain. Therefore you can vary it from 24 dB to 48 dB based on the expected received signal strength.

    So for any value of rxGain, the antenna peak gain will always be a constant.

    Regards,
    Jitendra