In this work, we present the design of a tri-band artificial magnetic conductor (AMC) as a quad-band reflector for the 5G, 4G, Wi-Fi and X-band communications. To show the interest of the solution, the AMC is placed under an Archimedean spiral at a distance close to a quarter-wavelength in the X band, which implies a smaller electrical distance for the 5G, 4G, and Wi-Fi. Compared to the spiral alone, an improvement in the broadside realized gain is obtained in all bands, with stable diagrams and a profile of 0.1 , where is the wavelength at 2.4 GHz.