QUESTION

Question

Hello all! Do I need to have the gnd plane only on the bottom of the IC on every layer (my stackup is gnd, 3v3, gnd, gnd), or should it also hug the left as well? Is the gnd layer supposed to be on one of these 4 layers under the IC? Thanks!

Answer 1

Hi,

Theres couple of issues I see from your image. The antenna needs a matching circuit on the transmission line.

There should be ground plane on the left of the antenna rather than clearance. The button on the left of the antenna might also affect the performance a bit due to proximity.

How long is this PCB may I ask?