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Original question:

CC-ANTENNA-DK2: requesting Altium .PCB file

CC1352P: Antenna design consideration with FR01-S4-224

Den L
Intellectual 990 points
Part Number: CC1352P
Other Parts Discussed in Thread: CC-ANTENNA-DK2,

Hello,

I have tested the FR01-S4-224 antenna from your CC-ANTENNA-DK2 dev. kit for 2.4GHz and 868MHz and would like to use it in my design. However, I don't have equipment to do the antenna tuning at the moment and thus would like to follow the most optimal design guidelines. Up until now I was following the LAUNCHXL-CC1352P1 design (for 20dBm boost of the 868MHz), however after the RF switch part I wanted to use the tuning which is presented in CC-ANTENNA-DK2 dev kit (Board Design #3). The problem is that it differs from the one presented in the FR01-S4-224 user manual. So, which one should I follow for the same Layer stack as in LAUNCHXL-CC1352P1?

Some side verification questions:

- Do you have a reference design for the CC1352P1 with the IPC Balun instead of discrete matching network? Would you suggest using an IPC balun instead of discrete components?

- I know it has been asked before about Atliums pcb files of the CC-ANTENNA-DK2, do you have any other format which could be converted to Atlium pcb files, e.g. .ALG files? 

Kind Regards,

Den

  • 0
    TI__Mastermind 33190 points

    Hi,

    If you are using the FR01-S4-224 chip antenna, then I would utilize the tuning services of Fractus. The exact tuning values is dependent on the GND plane size. This is valid for all monopoles antenna types (PCB, chip, wire etc.). The tuning will also be dependent on your casing choice as well.

    The 868-915/2440 MHz IPC is available from two vendors; Murata and Johanson Technology. Each has their own advantages and this is highlighted in the app note: http://www.ti.com/lit/swra629

    All future designs will be done in Altuim but for now I would just add the antenna structure manually in Altuim.

    Regards,

        Richard

  • 0 in reply to RGW
    Intellectual 990 points

    Hello Richard, 

    I don't have much time for the first prototype and Fractus don't seem to reply to their customers, or it takes them ages (wrote them 4 or 5 days ago). I am following your LAUNCHXL-CC1352P1 design and just going to use their Antenna with 50 Ohm for the first prototype.

    Here is the problem - I've converted .ALG design files which were provided for me on this forum of your LAUNCHXL board to Altiums. however the rules were not converted, so I don't know the Impedance routing parameters. I know the stack parameters from the "LAUNCHXL-CC1352P1-PCB Drill and Spec.pdf" from your design zip files, but I need the dimensions of the tracks for the impedance routing. Could you send me your stack data for the impedance routing of the LAUNCHXL CC1352P1 board? 

    Kind Regards, 

    Den

  • 0 in reply to Den L
    TI__Mastermind 33190 points

    Hi Den,

    Easiest way is to view the gerbers in a gerb tool such as Viewmate or similar program.

    The trace width is 150 um for all the RF front-end routing to the "50" ohm point/switch. Then the "CPW Ground" trace (gap/width/gap) is 500 um / 300 um / 500 um or 150 um / 250 um / 150 um. Both give approx 50 ohm characteristic impedance.

    Recommend to keep similar distance to the notches in the sub-1 PA LPF, otherwise they can be detuned if the PCB GND routing is too close.

    Regards,

       Richard