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AWR1243: isolation of AWR1243P

Qianqian
Genius 5010 points
Part Number: AWR1243

Dear TI Experts

About AWR1243P, I have below two questions need your help:

1.About the isolation,I'd like to know the isolation of  TX&TX; RX℞ TX&RX

2.The radiation frequency of the chip is 600 MHz lower than the design value.we set 76-77.4GHz， I'd like to know it's chip deviation or instrument deviation?

  • 0
    TI__Guru 58035 points

    Hello Qianqian,

    1) From the chip perspective, the Rx-Rx isolation is typically better than 40dB, Tx- Rx isolation is better than 30dB and Tx-Tx isolation is better than 25dB. Beyond the chip the antenna will also play a role in isolation, so that would depend on the antenna design.

    2) Do you mean the absolute frequency of 76-77.4 Ghz is shifted by 600Mhz ? The absolute frequency will depend on the Xtal and its load cap on the board. If the load cap is not based on the Xtal requirement  then the frequency of the xtal (40Mhz) frequency will be off. You can measure the 40Mhz xtal frequency and adjust the shunt cap values to bring it accurately to 40Mhz.

    Regards,

    Vivek 

  • 0 in reply to Vivek Dham
    Genius 5010 points

    Thank  you very much for your kindly help~