Experimental Study on Brush-Painted Passive RFID-Based Humidity Sensors Embedded into Plywood Structures

Figure 2

Noncoated tag and a close-up of the IC-area (a), IC-coated tag and a close-up of the IC-area (b), and all-coated tag and a close-up of the IC-area (c).

(a)

(b)

(c)