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

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="194145.fig.0011a" src="https://static.hindawi.com/articles/ijap/volume-2013/194145/figures/194145.fig.0011a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b><i>XZ</i> plane</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="194145.fig.0011b" src="https://static.hindawi.com/articles/ijap/volume-2013/194145/figures/194145.fig.0011b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b><i>YZ</i> plane</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="194145.fig.0011c" src="https://static.hindawi.com/articles/ijap/volume-2013/194145/figures/194145.fig.0011c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b><i>XY</i> plane</td></tr></table></td></tr></table>

<table>Measured normalized radiation patterns of the four kinds of tag antennas.</table>

International Journal of Antennas and Propagation

fig11

Figure 11

Figure 11: Dual-Dipole UHF RFID Tag Antenna with Quasi-Isotropic Patterns Based on Four-Axis Reflection Symmetry 