Compact Multi-band Octagonal-Shaped Patch Antenna with a Partial Ground for WLAN/Wi-MAX Applications

A multi-band octagonal-shaped microstrip patch antenna with a compact size of 30 × 26.5 × 0.8 (X, Y, Z) mm3 is designed on FR-4 substrate, and it operates in the WLAN 2.4/5.2/5.8 GHz bands and Wi-MAX 3.5 GHz band. The compact octagonal shape (split-ring resonator)-based patch antenna with multiple bands is presented in this paper. The proposed design is implemented on FR-4 substrate fed by a 50-Ω microstrip feed line. Prototype of the proposed antenna is simulated and showed good performance across the multi-band range with respect to the return loss, omnidirectional radiation patterns, and peak antenna gains. Results are more stable over all the operating regions.