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.

  • Resolved

PCB design on CC112x with sky65367

Intellectual 270 points
Idan Atia

Replies: 4

Views: 719

Hi

I want to design a PCB to the reference design as:

I have a few questions please:

1. is this design protect from high VSWR? if not, i will be happy to get an advice how to deal with that..

2. which nets should be 50ohm? (antenna's nets?RX/TX on CC112x?Skyworks' nets?other?)

thank you for yours reply, it help a lot!

Intellectual 270 points
Idan Atia
  • Intellectual 287390 points
    TER
    1) Some Skywork FEMs have a built in protection, some not. Please check the Skyworks datasheets.

    2) Only the trace out towards the antenna is 50 ohm. Note that a track for < 1 GHz has to be fairly long to be regarded as a transmission line.

     

  • Intellectual 270 points
    Idan Atia

    In reply to TER:

    Great!
    Is there a rule of thumb to the wanted trace length?
  • Intellectual 287390 points
    TER

    In reply to Idan Atia:

    If a trace is shorter than 1/10 of the wavelength of the wanted frequency it's not behaving as a transmission line. That does not mean that you can change the length of the other traces freely. For out designs the lines that are not 50 ohm the impedance of that trace has been taken into account in the simulations/ selections of components.

     

  • Intellectual 270 points
    Idan Atia

    In reply to TER:

    ok! thanks again!

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.


All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI worldwide | Contact us | myTI login | Corporate citizenship

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2021 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy policy | Terms of use