High gain broadband reflectarray antenna (RA) using novel frequency selective surface (FSS) has been shown here for millimeter (mm) wave band wireless communication. A 25×25 array of the FSS is arranged periodically to realize the reflecting surface. The geometry of the FSS consists of edge-connected dipoles (ECDs) at the unit cell's bounday and a cross-loop resonator (CLR) at the center. The Filter characteristic is evaluated for normal and oblique angles through numerical simulation. FSS exhibits bandstop resonance at 28 GHz with s_2l < -10dB stopband bandwidth (BW) between 25.28 to 29.62 GHz (4.34 GHz or 15.8 %). A conventional Ka-band pyramidal horn antenna is placed in a prime focus position to illuminate the reflecting surface. Radiation from the horn makes a plane wave after being reflected from the FSS and enhances the directivity of the primary feed. The designed antenna displays a broadside pencil beam radiation pattern with a gain of 21.8 dBi at 28 GHz. In two ortho-normal planes (: E and H-plane)., 3 dB beamwidth of the antenna is < 7.4°. © 2023 IEEE.