Experimental Study on Inkjet-Printed Passive UHF RFID Tags on Versatile Paper-Based Substrates

Figure 4

Microscopic images of the inkjet-printed layers: (a) surface of a one-layer line on Cardboard A, (b) surface of an eight-layer line on Cardboard A, (c) surface of a four-layer line on Cardboard B, (d) surface of a four-layer line on Paper A, (e) surface of a one-layer line on Paper B, and (f) surface of a two-layer line on Paper C.

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