Which layout the best?

[kaSva]

I wanna add faraday cage in my PCB.But my PCB has 2 layer.I used Top Layer(Red) for GND Plane.I used Bottom Layer(Blue) for Power and Data traces.

My Questions:

1-) If i create GND Plane on Bottom Layer(Blue) and add vias at around PCB.Is there any objection? (Look undermost image)


Normal PCB

With Faraday Cage PCB

 

[skywalker]

I not see great advantage with second image.

You can add a copper shield, (blue color) but this cannot make a great advantage.

The RED plane are the most important, reference (GND) and EMI shield plane.

Skywalker.