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.001a" src="https://static-preview.hindawi.com/articles/ijap/volume-2013/194145/figures/194145.fig.001a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Four-axis reflection symmetry</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="194145.fig.001b" src="https://static-preview.hindawi.com/articles/ijap/volume-2013/194145/figures/194145.fig.001b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Non-four-axis reflection symmetry</td></tr></table></td></tr></table>

<table>Radiation patterns of tag antenna with four-axis reflection symmetry and non-four-axis reflection symmetry.</table>

International Journal of Antennas and Propagation

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Figure 1

Figure 1: Dual-Dipole UHF RFID Tag Antenna with Quasi-Isotropic Patterns Based on Four-Axis Reflection Symmetry 