Welcome to the Pycom forum Forum
    • \[\[global:header.categories\]\]
    • \[\[global:header.recent\]\]
    • \[\[global:header.tags\]\]
    • \[\[global:header.popular\]\]
    • Login

    Explore Pybytes | Official Documentation | Report a Firmware Bug/Issue | GitHub

    L01 Antenna design

    Scheduled Pinned Locked Moved Discussion
    3 Posts 2 Posters 44 Views 2 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • C Offline
      Cristi
      last edited by

      Hello everybody!

      I need to use the L01 OEM module for a prototype project which, in the end, if everything will go well will turn into a product. The project will mainly be focused on LoRa but I would like to include the BT and WiFi capabilities.
      Since I have to design the PCB I will have to include the antenna. I don't have much experience with RF circuits since I've always used in my design complete modules with antennas already installed.

      For this project, I would like to use only a ceramic antenna so no antenna switch is needed. According to the circuit diagram of the "Universal OEM Baseboard" that uses the RF switch (SKY13350-382LF) the matching impedance circuit is made by L17, L16 and C16 - see picture attached. The other caps C9, C10, C11, C15,C 14 are used according to the RF switch datasheet.

      oem lora.png

      My question is:

      Will it be ok to just connect the output of the matching impedance circuit to the antenna pin of the OEM module (blue arrow)?

      Thank you in advance for your answers.

      1 Reply Last reply Reply Quote 0
      • G Offline
        Gijs
        last edited by

        Hi,

        I cannot make any guarentees for your final result, as there's some more to antenna design and placement than just the matching circuit.
        You should be able to verify the matching circuit with the impedance of the ceramic antenna you're planning on using. If anything, I'd keep a capacitor in series at least, to block any DC coming in.

        C 1 Reply Last reply Reply Quote 0
        • C Offline
          Cristi @Gijs
          last edited by

          @Gijs Hi thank you for your reply. I intend to use the same antenna as the OEM module uses. According to 25450AT43B100 datasheet, the layout will be like the one below:

          layout.PNG

          1 Reply Last reply Reply Quote 0

          Hello! It looks like you're interested in this conversation, but you don't have an account yet.

          Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.

          With your input, this post could be even better 💗

          Register Login
          • 1 / 1
          • First post
            Last post

          Pycom on Twitter

          Pycom