Improvement of the Bandwidth and Gain of an Antenna Based on a Ferrite Material by Using a Metamaterial Superstrate

A laminated microstrip antenna based on ferrite material is designed. This antenna not only solves the problem of simultaneously satisfying the wide beam and high gain of the microstrip antenna, but also uses a metamaterial superstrate increases the bandwidth and gain of the antenna. The designed index-optimized antenna can be applied to the 5.46 GHz frequency point. After the metamaterial overlay is added, the bandwidth of the antenna is broadened by nearly 6.5 times, and the gain is increased by about 23.5%.