Illustration of the Impedance Behaviour of Extremely Low-Profile Coupled Shorted-Patches Antennas for UHF RFID of People

Table 2

Measured maximum identification distance in the corridor of building 4 m in width and 3.5 m in height.

Tested configuration	Reader and tag antenna axis offset [m]	Reach of correct identification 𝑑max [m]
Dipole-excited antenna on the chest of a person	0	7.5
	1.8	7
Directly excited antenna on the chest of a person	0	7
	1.8	6