Design of a Three-Dimensional Uniform UHF Near-Field RFID Reader Antenna

Table 1

Dimensions of optimized antenna design.

Parameters	Description	Value (mm)
HG	Height of the ground	0.035
HP	Height of the patches	0.035
HS1	Height of the substrate 1	2
HS2	Height of the substrate 2	2.6
HSP	Height of the microstrip line	0.035
L	Substrate length	117
W	Substrate width	117
W1	Microstrip line width 1	2
W2	Microstrip line width 2	3
SPL1	Microstrip line length 1	30
SPL2	Microstrip line length 2	44
SPL3	Microstrip line length 3	28
PL	Parasitic patches length	30
PW	Parasitic patches width	30