I'm working on a ISM (868Mhz) weather station for my home and i'm trying to implement a Ceramic antenna directly on PCB. After reading the guidelines, i have questions again.
One of then is what about 4layers circuits... Chip antenna reference : M620720 from AVX (link)
Actually, my pcb stackUp is like that : 1. Top (Signal). 2. internal_plane_1 (GND). 3. internal_plane_2 (different VCC). 4. Bot (signal).
On page 5, the constructor propose that :
My question, We see a big gnd copper planar (Top + internal_1 OR Top+Bot)(with correct impedance). if i use the first solution (Top+internal_1), what about internal_plane_2. i have to remove it or not ?
tell me more if you have opinion