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IWR1443: Antenna design with Rogers 3003

Norberto Fiori
Prodigy 90 points
Part Number: IWR1443
Other Parts Discussed in Thread: AWR1642, , IWR1642

Good morning,

can you suggest me a reference design for patch antenna implemented with Rogers 3003 substrate instead of 4835Low Pro?

Thanks

  • 0
    TI__Guru 69960 points

    Hello Norberto,

    Take a look at the section 'Design Files' on the IWR1443BOOST page for design files.

    Regards,

    Jitendra

  • 0 in reply to Jitendra Gupta
    Prodigy 90 points
    Thanks Jitendra, I got this files and design, but everything refers to Roger 4835 that is different from Roger 3003 (already suggested as alternative from TI). I guess I need to design a new antenna, maybe with the same configuration but different dimensions due to different substrate. I was wondering if ther's some reference design with that specific substrate, since I know it's commonly used by TI for evaboard.
    Thanks
  • 0 in reply to Norberto Fiori
    TI__Mastermind 37500 points

    Hello,

    The yet to be released Cascade board antenna is designed for use with the RO3003 5mil dielectric thickness.  This is for the 77-81Ghz range,

    This is for a single Tx or Rx array patch.   

    Regards,

    Joe Quintalhttps://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/1023/TX_5F00_RX_5F00_antenna1.dxf

  • 0 in reply to Radio-Joe
    Prodigy 90 points

    Hello Joe, thank you for your prompt reply!

    looking at the drawing, seems that the trace width from antenna to grounded coplanar is 270um (10.63mils) but on spracg5.pdf the suggested trace for roger 3003 substrate is 213um, so I'm wondering wich one is the correct. The standard antenna has a trace width that is 7.08mils, the same of the suggested for Roger 4835 on spracg5.

    For Roger 3003 the trace width is 213um, with gap from copper ground plane that is 102um: can you confirm that?

    I've also found a difference between gerber of IWR1443boost board and spracg5: the gap from trace to ground plane is 8.01mils instead of 6.73mils, so I don't know wich one is correct (I guess the one foun on gerber, since it's working....)

    Thanks

  • 0 in reply to Norberto Fiori
    TI__Mastermind 37500 points

    Hello

    spracg5 AWR1642 is designed with Rogers 4835 LoPro 4mil dielectric (see stackup figure in application note).

    The DXF file is from a board with a Rogers 3003 5 mil dielectric stackup.   The DXF file is used to create the PCB patch antenna.

    The IWR1443 boost board is also built with Rogers 4835 LoPro 4 mil dielectric.

    The trace widths will be different depending on the board material.   If you want to copy the design, the suggestion would be to use the IWR1642 or IWR1443

    and use Rogers 4835 LoPro with 4 mil dielectric, there is a stackup drawing with the EVM so you can also copy the stackup.

    Regards,

    Joe Quintal

  • 0 in reply to Radio-Joe
    Prodigy 90 points
    Hello Joe,
    I will copy, at the beginning, the design of EVM; I would only highlight the differences between gerber, DXF and spracg5 about traces and ground gap. I will use the same as gerber file
    Thanks a lot