Dual-Dipole UHF RFID Tag Antenna with Quasi-Isotropic Patterns Based on Four-Axis Reflection Symmetry

Table 5

Minimum power required for the test of the four kinds of tag antennas in three planes.

Power	𝑋𝑍; (dBm)	𝑌𝑍; (dBm)	𝑋𝑌; (dBm)	Gain deviation; (dB)
Proposed antenna max.	14.00	13.75	14.75	3.25
Proposed antenna min.	11.75	11.50	13.25
Invengo TF8023 max.	15.00	15.25	18.75	5.25
Invengo TF8023 min.	14.00	13.50	16.00
Impinj H47 max.	15.75	17.25	19.00	5.75
Impinj H47 min.	13.25	13.50	15.75
UPM frog 3D max.	17.25	17.25	21.75	6.50
UPM frog 3D min.	15.25	15.50	19.50