• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 17 subscribers
  • Views 602 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

1 Watt RF3858 PA and CC1101

Sverre
Mastermind 39860 points
Other Parts Discussed in Thread: CC1101

1 Watt RF3858 PA and CC1101

AN101 "Using 1 W RF3858 Front End with CC1101 under FCC 15.247" outlines the expected performance when using a RF3858-CC1101 design under FCC Section 15.247 in the 902-928 MHz frequency band. The RF3858 is a single-chip front-end module from RFMD. The maximum output power for the combined solution is 1 W and the sensitivity is improved 5-6 dB compared to a CC1101 stand-alone solution.

App note is available from http://www.ti.com/lit/swra377 and reference desing from http://www.ti.com/lit/zip/swrr085

  • 0
    Expert 1460 points

    Hi Sverre,

    Interesting app note!

    Do you have any radiation data of the design that you could share.

    Radiation of harmonics and conducted harmonics might not be the same. (shock :-)

    (The app note state that shielding can is required to comply with radiation requirements, so the app.note already reveal that someone have looked at this)

    Ørjan

  • 0 in reply to no_more_wires
    TI__Mastermind 39860 points

    Support on the RF3858+CC1101 is provided by RFMD through smartgrid@rfmd.com. RFMD has been notified, so hopefully they will respond shortly.

    And, yes, radiated and conducted harmonics / spurs are not the same...................

     

  • 0 in reply to no_more_wires
    Prodigy 10 points

    Hi Ørjan,

    From an RFMD point of view, radiated measurements were not taken on this design.  The intention for this design is to show the RF performance of the combination for the CC1101 and RF3858 conducted.  On the other hand, we recommend that customers add a shield on this design to prevent harmonic leakage due to the nature of the high power presence at the antenna from the RFMD FEM.

    Tim