The results of the read distance and rate test on each material are shown in Table 3.
The researchers conducted the experiment 10 times per tag. To formally evaluate the RFID performance, we need to consider a number of experimental variables [20], [31] and [46].
Tzeng et al. [20] conduct the performance test 120–350 times. With the limited experiment, the read distance and rate test in our research only aim to examine and indicate the feasibility of the key material types.