A wideband eight-port eight-wave annular-ring (AR) patch antenna for $8\times $ 8 MIMO mobile devices is presented. The AR patch antenna is formed into eight dual-resonant 45o-ring sectors to radiate eight very-low-correlated or generally uncorrelated waves for $8\times $ 8 MIMO application. Each ring sector is loaded with two shorting pins and excited by a simple probe feed to genera... https://foldlyers.shop/product-category/managed-switches/