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Feed Line

Hi,
Please have a look and let me know about it.

This board is two layers and i used chip antenna. I would like to ask you, Is this design is correct? How can i plan with less antenna area?
I try YJ-18010-nrf52840 module and worked very well. I could communicate between two boards at 150 meters. I dont understand YJ-18010-nrf52840 module design, I saw an short feed line. Can you explain how it work?

YJ-18010-nrf52840 module link : http://www.holyiot.com/eacp_view.asp?id=278

Thanks for the reply in advance.

Parents Reply
  • Hi,

     

    This antenna is 'corner mount' (see the datasheet), while you have mounted it as 'end mount' (see this guide by Johanson). It will probably still work, just not optimally, varying between different models. It probably causes the antenna to detune quite a bit though, you should add another component to the antenna matching network to make sure you can match any antenna impedance. Either a parallel component between L3 and the antenna, or a series component between L4 and C28.

     

    Best regards,

    Andreas

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