Multi-band metamaterial-based microstrip antenna for WLAN and WiMAX applications

Two multi-band metamaterial based microstrip antennas are designed for WLAN and WiMAX applications. Antenna 1 consists of a simple rectangle monopole radiator with a 2×3 complementary split ring resonator (CSRR) printed on its back ground. By using CSRR technique, two frequency bands operating at 3.2-3.9 GHz and 5.65-5.8 GHz are achieved. Antenna 2 is composed of a rectangle patch with a CSRR slot and a conventional ground plane, which can provide a triple-band characteristic covering 2.4-2.48 GHz, 3.3-3.9 GHz and 5.15-5.7 GHz. The operational bands of these two antennas can be used for WiMAX at 2.5/3.5/5.5 GHz and WLAN at 2.4/5.2/5.8 GHz, and it has omnidirectional radiation patterns, which can be the good candidate for WiMAX and WLAN applications.