Single-Fed Broadband CP Bidirectional Antenna with Double-Layer Diagonally Aligned Plates for Universal UHF-RFID Applications

Table 1

Parameters of single-fed broadband circularly polarized bidirectional antenna operable at universal UHF-RFID frequency band.

Symbol	Parameters	Optimal dimension (mm)
W	Width of antenna	146
L	Length of antenna	275
H	Height of wall patch	10
Wtf	Width of upper rectangular patch	74
Wbf	Width of lower rectangular patch	74
Lty	Length of upper rectangular patch	138
Lby	Length of lower rectangular patch	137.5
Δ	Feeding gap	3
—	Copper thickness	1