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CC3135MOD: Antenna used in data sheet?

Peter Malm
Prodigy 170 points
Part Number: CC3135MOD


Hi,

I am looking at the cc3135mod module. In order to lean on the certification done on the module I want to replicate the layout of the antenna part as much as possible. The recommended antenna is the Ethertronics 830520 as stated in the datasheet (SWRS225A). In section 7.2.2, p51, figure 7.4 there is a picture of the antenna layout. However, I don't see how this is possible as the layout shown of the antenna only has two pins, while the recommended 83050 has 6 pins. What antenna is shown in the picture? And if 830520 is recommended, can you provide a layout for that to follow to comply with certification?
Regards,
Peter
  • 0
    TI__Mastermind 46701 points

    Peter,

    The antenna shown in the picture is the M830520. Yes, the antenna symbol shown in the schematic has 2 pins, but it has 6 pins. Refer to the M830520 datasheet, and you'll note that one pin is the feedpoint, one is GND, and the other four are dummy pads, hence the 2 pin symbol.

    For layout guidelines, you can refer to the antenna datasheet as well as our reference design. The reference design is that of the board that was used to test and pass certification.

    BR,

    Seong

  • 0 in reply to Seong Kim
    Prodigy 170 points

    Hi Seong,

    The antenna in the layout cut-out on p.51 in the cc3135mod data sheet is NOT the 830520 antenna. It has only two pads and the layout is far from the 830520 data sheet. It looks more like the Pulse antenna, but is also quite different compared with that data sheet. However, in the reference design kit you linked to, in the MCU064A_BOOSTXL_CC3135MOD_PCBLayout, there is the correct antenna shown, with its six package pins. So the picture in the cc3135mod data sheet is wrong.

    Regards,

    Peter

  • 0 in reply to Peter Malm
    TI__Mastermind 46701 points

    Peter,

    Correct, the image on pg51 is to show an example of the RF placement and routing, and not intended to show the antenna. I will update this image to reflect what you see in the reference design. Thank you. 

    I will close this thread. Please start a new one for any other queries.

    Thanks,

    Seong