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CC1310: I tried to reduce the size of the CC1310 related design, but the RF performance（433MHz） was not as good as expected. What can be improved?

A B
Prodigy 10 points
Part Number: CC1310

This is my schematic design and PCB design.

When the software sets the RF power to 4dmb, the actual signal strength measured using a spectrum analyzer is only -20dbm.

Where can I improve my design?

  • 0
    TI__Expert 4230 points

    Hi,

    accessing images from external file sharing sites is an issue for us. Could you please upload the images directly to E2E?

  • 0 in reply to Diego P
    Prodigy 10 points

    Sorry I didn't notice this issue.I've re-uploaded the image and hopefully it will display normally now

  • 0 in reply to A B
    TI__Expert 4230 points

    Hi A B,

    I noticed you don't have the 22uF capacitor on VDDS_DCDC in your schematic and a 100nF cap is missing. There should be a 100nF cap for each VDDS pin. Were this component intentionally left out?

    I see you don't have an RF connector on your board. How exactly are you measuring the output power? Are you soldering a semi rigid cable?

    Are you using Smart RF studio to set the device to continuous Tx or how are you transmitting the carrier wave?