Other Parts Discussed in Thread: TPS610981
Hello,
I am developing a human body proximity sensor with FDC2212 and have made several tests using a cooper tape of 40cm long and 2.5cm large (100cm2 area) as an electrode. I have reached about 30cm to 35cm distance of sensing wich is good enought for my application.
An important information is that is a battery powered system (CR2032).
I am now developing a new electrode using a double face, 0.5mm thickness, FR4, 1oz/ft^2 PCB (see picture below). As it is a double face PCB I can leave copper in top and bottom, but I am not sure what is the best pratice in order to increase distance of sensing :
1) Populate as much vias as possible in order to make Top and Bottom fully conected?
2) What happens if I place vias only in the extremities of the board so it closes a big loop with the twice area?
3) Place vias only in the middle so Top and Botom becames as two electrodes in paralel ?
Best regards.