In this paper, a modified frequency selective surface (FSS) is proposed for cloaking of a dielectric cylinder. To this end, the needed value of surface reactance (Xs) of the FSS structure to eliminate scattering coefficient of the dielectric cylinder, is analytically calculated; the obtained value is 195 Ω. The modified double slot square loop unit cell, is designed to realize the calculated value of zs. A dielectric cylinder with radius 12.45mm and height 180mm is covered with the array of the designed unit cell. Scattering width and electric field distribution of the dielectric cylinder with and without the designed FSS structure are obtained by CST software. Based on the simulation results, the total (SW) of the dielectric cylinder with the proposed FSS structure is about 0.88, which is about 10 units lower than that of value in uncloaked cylinder. The designed FSS is a suitable structure in dielectric cylinder cloaking applications.
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