A 
system and / or method for sensing the presence of 
moisture (e.g., rain) and / or other material(s) on a window such as a vehicle window (e.g., vehicle 
windshield, 
sunroof or backlite). In certain example embodiments, a plurality of sensing capacitors are supported by a window such as a vehicle 
windshield, the capacitors each having a different field and / or pattern. A sensing circuit outputs an 
analog signal that is based on and / or related to the capacitances of one or more of the sensing capacitors. In certain example embodiments, a flexible 
printed circuit board (PCB) mountable in or on a vehicle window is provided. First and second sensing circuits are formed on opposing sides of the flexible PCB, with each said sensing circuit comprising a plurality of different fractal structures. A 
ground plane is located between the first and second sensing circuits, with the 
ground plane being arranged so as to decouple the first and second 
capacitor arrays and to shield the first 
capacitor array from fields emanating from the second 
capacitor array and vice versa. The electronic device is configured to detect 
moisture on an exterior surface of the vehicle window, 
humidity on an interior surface of the vehicle window, and EMI.