109450.fig.002
Figure 2: Simulated return loss of the proposed antenna with different values of gap width between the rectangular ring, open-ended antenna and the strip ( ). (Other parameters:  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm;  mm; and  mm.)