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About A5645H GND Plane
Is it okay to use a ground plane for another layer under the A5645H Feed terminal (2pin)?

Or is it free along the pattern?

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1 Answer

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Hi Nakazato,

It is best to keep the ground plane far enough away from underneath the antenna feed pad in order that the antenna feed trace and pad are 50 ohms to the antenna.  So, whichever ground layer you are using as a 50-ohm reference layer for the antenna feed trace keep it cohesive to the end of the board under the antenna feed pad.
Best regards,

Geoff S.

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