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I have a standard chip antenna mounted on a large ground PCB plane.

enter image description here

The product is unfortunately encapsulated inside a relatively open (carbon-fiber) conductive cage.

Unfortunately, I see an obvious loss in the RF signal due to the Faraday cage principle.

How can I avoid such loss?

It would be difficult to put the antenna outside the cage. But would it make sense to have a wire or some conductive tape from the ground antenna plane to the cage itself or to "outside"?

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    \$\begingroup\$ Convert the antenna to a patch type and mount it externally. \$\endgroup\$
    – Andy aka
    Commented Jul 18, 2020 at 8:15
  • \$\begingroup\$ Also, carbon-fiber sounds like a pretty ineffective faraday cage, and chances are it doesn't shield that much \$\endgroup\$
    – Marcus Müller
    Commented Jul 18, 2020 at 9:11
  • \$\begingroup\$ How much loss do you see? Can you show us the conductive cage? \$\endgroup\$
    – Stefan Wyss
    Commented Jul 18, 2020 at 16:26

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Place the antenna immediately next to the Carbon Fiber (not even an air gap), and your loss will greatly reduce.

This answer may guide you.

Why are many IR receivers in metal cages?

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  • \$\begingroup\$ Thank you for the suggestion. Can you please describe the rationales behind your answer? \$\endgroup\$
    – gregoiregentil
    Commented Jul 18, 2020 at 20:04

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