A dual band Wi-Fi antenna using a metamaterial CSRR matching particle

Dual band antennas are important for many different communication protocols such as Wi-Fi which works at two frequency bands, 2.4-2.5 GHz and 5.15-5.85 GHz. While there are many techniques published to design a dual band antenna, one possible way is to use a matching network. To achieve the required broadband matching at two different bands a novel double-tuned, dual-band, matching network is herein proposed. First the theory of double-tuned, dual-band matching is described. Subsequently, the method is applied to match a compact planar monopole to the WiFi bands using a compact Complementary Split-Ring-Resonator(CSRR) microstrip line as the matching network. By integrating this dual-band matching network with the monopole, the antenna as a whole is designed to cover the two different frequency bands.