A Microstrip Reflectarray Antenna Based on Double Minkowski Rings

In this paper, a microstrip reflectarray antenna based on double Minkowski fractal rings is proposed. Due to the self-similarity and unlimited space filling of the fractal structure, smaller element spacing and better reflection phase compensation can be achieved. By varying the length of the element from 0.8 cm to 1.4 cm, a phase variation range of 397° can be obtained. The simulation results show that the antenna gain is 19.1 dBi at 5.8 GHz and with 1-dB gain bandwidth of 18.6%(5.54-6.62GHz).