Dual-band reflectarray using combination of mushroom-like structure and dipole array

This paper proposes a novel reflectarray which can reflect two frequency radio waves within the same polarization. To achieve this, this paper adopts combination of mushroom-like structure and dipole array. The analysis results using HFSS shows that proposed reflectarray structure can be designed using gap size between mushroom patches to determine reflection phase at higher frequency and dipole length to determine reflection phases at lower frequency independently.