An electronic beam-steering reflectarray antenna system comprising: a reflectarray metasurface positioned at a predetermined height below a standard half-wavelength dipole antenna; a plurality of comb-shaped unit cells arranged as a matrix over the reflectarray metasurface, wherein each of the plurality of comb-shaped unit cells is designed as one of i) a first unit cell structure, and ii) a second unit cell structure, wherein the first unit cell structure comprising: a comb shaped structure with a comb shaped first part and a comb shaped second part separated by a predefined gap to mount a varactor diode at a designated position, wherein the comb shaped first part comprising a first trunk, and a plurality of first arms comprising a first top arm, a first center arm and a first bottom arm, wherein the comb shaped second part comprising a second trunk, and a plurality of second arms comprising a second top arm, a second center arm, and a second bottom arm, and a structural design of the first trunk, the second trunk, the plurality of first arms and the plurality of second arms comprising a copper bottom layer reflector, a first dielectric substrate separating the copper bottom layer reflector and the comb shaped structure, wherein the first trunk and the second trunk has one or more X-directed copper patches, and the plurality of first arms and the plurality of second arms has a single Y-directed copper patches, wherein the first trunk spans across length of the comb-shaped unit cell along the X-direction, wherein the second center arm is of fixed length and connected to the copper bottom layer reflector through the first cylindrical metal post, and wherein a DC voltage fed to the varactor diode) through the first trunk; and wherein the design of the second unit cell structure comprising: a variation to the first unit cell structure with an additional copper layer positioned below the copper bottom layer reflector through a hole with the second cylindrical metal post from the first center arm, a second dielectric substrate separating the copper bottom layer reflector and the additional copper layer, and wherein length of the first trunk is less than length of the comb-shaped unit cell structure in the X-direction. a reflectarray metasurface positioned at a predetermined height below a standard half-wavelength dipole antenna; a plurality of comb-shaped unit cells arranged as a matrix over the reflectarray metasurface, wherein each of the plurality of comb-shaped unit cells is designed as one of i) a first unit cell structure, and ii) a second unit cell structure, wherein the first unit cell structure comprising: a comb shaped structure with a comb shaped first part and a comb shaped second part separated by a predefined gap to mount a varactor diode at a designated position, wherein the comb shaped first part comprising a first trunk, and a plurality of first arms comprising a first top arm, a first center arm and a first bottom arm, wherein the comb shaped second part comprising a second trunk, and a plurality of second arms comprising a second top arm, a second center arm, and a second bottom arm, and a structural design of the first trunk, the second trunk, the plurality of first arms and the plurality of second arms comprising a copper bottom layer reflector, a first dielectric substrate separating the copper bottom layer reflector and the comb shaped structure, wherein the first trunk and the second trunk has one or more X-directed copper patches, and the plurality of first arms and the plurality of second arms has a single Y-directed copper patches, wherein the first trunk spans across length of the comb-shaped unit cell along the X-direction, wherein the second center arm is of fixed length and connected to the copper bottom layer reflector through the first cylindrical metal post, and wherein a DC voltage fed to the varactor diode) through the first trunk; and wherein the design of the second unit cell structure comprising: a variation to the first unit cell structure with an additional copper layer positioned below the copper bottom layer reflector through a hole with the second cylindrical metal post from the first center arm, a second dielectric substrate separating the copper bottom layer reflector and the additional copper layer, and wherein length of the first trunk is less than length of the comb-shaped unit cell structure in the X-direction.