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CC1352P7: Filling the Range Estimation table when using Development Board Sub-1Ghz

HARI Thazhe Oyyoth
Prodigy 50 points
Part Number: CC1352P7
Other Parts Discussed in Thread: CC-ANTENNA-DK2

Dear Team,

We are using Sub-1 Ghz communication

I am using CC1352P7 for my project.Currently we are testing with development baord.

I am calculating the range using the RF calculator. I have couple of questions.

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1) When I am using develpment board,what is the antenna height I need to use.I am using PCB antenna present in the board.I believe I can take 1m itself.

2) May I know the effective gain of TX and RX antenna when using the development board.

3) What is the antenna position.I believe it is based on how I am plaing the board.Vertical or Horizontal.

Regards

HARI

  • 0
    TI__Mastermind 18605 points

    Hi Hari,

    A lot of these questions are answered in SWRA479 (Achieving Optimum Radio Range): https://www.ti.com/lit/swra479 - I will mention the relevant sections in bold where possible.

    1) It depends on what height the antenna is being fixed; if you are on the roof of a building or the ground floor it can have a significant impact (ideally you would want the transmitter to be as high as possible). Assume 1-2m if you are just holding the antenna. Section 2.1.

    2) The antenna gain is a property of the hardware, so it is not adjustable in FW. The LP-CC1352P7-1 and CC1352P7-4 LaunchPads have different PCB antennas, so it depends on what you are using.

    Those App Notes contain the required information about the integrated PCB antennas used.

    3) Yes, the polarity depends on the position of the antenna. For the CC1352P7 LaunchPads, the antenna polarity is typically set as vertical in the calculator due to its radiation pattern.

    Regards,

    Zack

  • 0 in reply to ZC
    Prodigy 50 points

    Hi Zack,

    Thank you.

    I will check the document and ,if I need any clarification I will come here.

    Regards

    HARI

  • 0 in reply to HARI Thazhe Oyyoth
    Prodigy 50 points

    Hi Zack,

    We are using  LP-CC1352P7-1.

    I believe I can take  around –1 dBi to –2 dBi

    Regards

    HARI

  • 0 in reply to HARI Thazhe Oyyoth
    TI__Mastermind 18605 points

    Hi Hari,

    Please take a look at the following App Notes (starting with the Quick Guide):

    The LaunchPad PCB antennas are recommended if you have the available PCB area for them. If your design is for Sub-1 GHz operation only, we recommend: https://www.ti.com/lit/swra227 (as linked in my previous reply, this is just for clarification).

    This is Board 6 mentioned in SWRA328 (Section 4.8.1). The measured gain at 868 MHz (single-band mode) was 5.05 dBi in the test report discussed in that App Note (without an EM or EB board attached), but note that the GND plane, product casing, etc. will be different for your design which will affect the performance. You can always reduce the Output Power setting if required.

    Regards,

    Zack