• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 32 subscribers
  • Views 290 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CCS/IWR1443: How to connect two TX channels to an antenna to increase transmission power?

Zhenhua Yue
Intellectual 295 points
Part Number: IWR1443

Tool/software: Code Composer Studio

Dear sir，

How to connect two TX channels to an antenna to increase transmission power?

By chip or print circuit.

  • 0
    TI__Guru 50240 points

    Hi Zhenhua,

    I've asked an expert to look into this and we should have an answer for you sometime next week.

     

    Cheers,

    Akash

  • 0 in reply to Akash Gondalia
    TI__Mastermind 25835 points

    Hi Zhenhua,

        Transmitter antennas should be length matched and should be matched (50 Ohm at the reference plane).

    You could review IWR1443boost board for the antenna connectivity to the mmWave chip. Tx1 and Tx3 are placed in Azimuth plane (Length matched). 

    When Tx1, Tx3 is transmitted simultaneously you should see increased in the transmit power. Typically this is measured with EIRP (Equivalent Isotropically Radiated Power)  EIRP = Chip Tx Power – Trace Loss + Antenna Gain. For ideal trace you should expect 6dB improvement in EIRP vs single transmitter.

    When you transmit with multiple transmitters field of view reduces and grating lobes. This affect need to be simulated. 

    This effect could be reduced with the help of receiver antennas (using receive beam forming), Hence Tx and Rx antennas have to be looked together for system link budget analysis. 

    Thanks and regards,

    CHETHAN KUMAR Y.B.

  • 0 in reply to CHETHAN KUMAR Y.B.
    TI__Expert 4025 points

    Hi Chethan,

    Zhenhua want to combine TX1 and TX3 to a single antenna to adapt their product. He want to know if it could be implemented on IWR1443 and if you have detailed suggestion on hardware design.

    Thank you very much.

    Regards,

    Allen 

  • 0 in reply to Allen35065
    TI__Mastermind 25835 points

    Allen, 

       Thanks for the clarification. 

    We may have to use the “power combiner” option here. Very common practice is to do Wilkinson power combiner. This would need electromagnetic simulation to ensure power combiner, transmission line designs and right matching is done.However we do not have any reference design available to demonstrate this. 

    Thanks and regards,

    CHETHAN KUMAR Y.B.