Table 2.

Comparison of pathloss exponent at various transmission frequencies

References	Frequency	Pathloss exponent (n)	Tested body part
[25]	2.45 GHz	2.16	Arm
[26]	6–9 GHz	4.9	Arm
[26]	4–5 GHz	3.2	Arm
[27]	2.45 GHz	3.47	Not reported
[28]	2.45 GHz	3.11	Arm
[29]	2.4 GHz	2.57	Not reported
[30]	20–60 MHz	1.8	Not reported
This work	0.5–17.5 MHz	0.75	Arm