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Tue, 2016-09-06 06:46
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dhirajp15
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Antenna Design

Hi Dialog,
我设计一个使用Inve da1483 pcbrted F antenna design(Full sized IFA) as specified in the Application note AN-B-027. Can you please mail me the pictures of top view and bottom view design of Antenna so that i can just verify before printing the pcb.

Device:
DA14583
Tue, 2016-09-06 16:52
MT_dialog
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Hi dhirajp15,

Hi dhirajp15,

There is a picture of the layout in the application note and the .dxf files on the support site. What exactly are you looking for in that photo that cannot be seen in the design files ?

Thanks MT_dialog

Tue, 2016-09-06 19:04
dhirajp15
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Hi MT_Dialog,

Hi MT_Dialog,
The dxf files cannot be imported properly in kicad software so I had to design the antenna myself.The picture in the application pdf shows the top view, I want to ask that should i replicate the same at the bottom ? Do we need to include feeder arm at the bottom ? and should I used same values of inductor ,capacitor for the design or will they change ?
I also request you to check if the antenna i have desined is having proper gorund pad and enough vias ?

Attachment:
Package iconIFA.zip
Wed, 2016-09-07 17:10
MT_dialog
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Hi dhirajp15,

Hi dhirajp15,

Please find the answer from the hardware team and the attached pictures.

Here are the main differences to your design:

  • Ground on the bottom side under the matching network.
  • Ground vias in the ground planes close to the antenna.
  • More vias connecting both antenna traces

Regarding the RF layout in general:

  • a parallel 3n9H inductor close to the 580 will bring the RF port to 50 ohm.
  • are there gnd vias in the gnd planes connecting top to bottom ? At least they are not visible in the picture.
  • There might be some coupling between RF and 2_7, because of the parallel traces without gnd in between.

Thanks MT_dialog

Attachment:
Package iconAntenna layout.zip
Wed, 2016-09-07 18:21
dhirajp15
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Hi MT_Dialog,

Hi MT_Dialog,
Thank for the prompt reply : )