Figure 3
From: An octa-band planar monopole antenna for portable communication devices

Simulated S-parameters for (a) Ant-1, and Ant-2, (b) Ant-3 and the proposed antenna.
From: An octa-band planar monopole antenna for portable communication devices

Simulated S-parameters for (a) Ant-1, and Ant-2, (b) Ant-3 and the proposed antenna.