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Antenna problems

redflood
Intellectual 780 points

Hi everyone,

Can I use balun: LFB182G45BG2D280 with AH316M245001-T for CC254x?

Thanks!

  • 0
    TI__Mastermind 23440 points
    Hi,

    I've notified our hardware guys to look at you post.

    Best regards,
    Aslak
  • 0
    TI__Guru** 106705 points
    The LFB182G45BG2D280 balun has 50 ohm output impedance, so any 50 ohm, 2.4 GHz antenna can be used with this device (as well as with the discrete component balun). AH316M245001-T can thus be used. Be sure to follow the recommended matching component requirements from the antenna datasheet, and also make sure that the impedance of the trace between the balun and the antenna is 50 ohm.

    Cheers,
    Fredrik
  • 0 in reply to Fredrik K
    Intellectual 780 points
    Thanks TI's support!
    - In my thought, when I use balun I will not care about impedance of trace (it's integrated inside), am I right?
    - How I can design 50 Ohm impedance on 02 layers PCB ( which tool is used? and tutorial?), is it possible?
    Plz help me to answer 02 questions that make me confused.
    Thanks again !
  • 0 in reply to redflood
    TI__Guru** 106705 points
    - You need to control the impedance of the trace between the balun and the antenna (unless it is very short).
    - You can use TXLine for example, it is free. For 2-layer PCB the line will be a Coplanar Waveguide (CPW) with ground.