Fig. 4

Comparison of simulated return loss (|S11| in dB) for Ant A, Ant B, and the proposed tri-band antenna, showing the impact of offset feeding and OCSRR loading.
Comparison of simulated return loss (|S11| in dB) for Ant A, Ant B, and the proposed tri-band antenna, showing the impact of offset feeding and OCSRR loading.