Cross-Slot Antenna with U-Shaped Tuning Stub for Ultra-Wideband Applications

<table>Effect of <i>L<sub>T</sub></i> changes on return
loss. <i>L<sub>T</sub></i> is the distance between the center of the
cross-slot and the square ring.</table>

International Journal of Antennas and Propagation

fig3

Figure 3

Figure 3: Cross-Slot Antenna with U-Shaped Tuning Stub for Ultra-Wideband Applications 