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A CP Antenna of Wide Half-Power Beamwidth for UHF RFID Near- and Far-Field Applications

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Figure

Figure 2. Antenna currents distribution. (a) Design thought. (b) CP and ODC currents distributionat 0◦ and 90◦ when frequency is at 900 MHz.
Fig. 2, the currents rotate in a clockwise direction, and the antenna excites LCHP radiation
Figure 4. Measured ARBW and Gain.
Figure 6. Simulated |Hz| along X-axis at Z = 5 m.
+2

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