Abstract: A fluid mixing structure (10) for mixing at least two fluidic components has a flow inlet port and a flow outlet port and comprises a contraction zone (12), an expansion zone (14), and a retention zone (16), arranged in this order in an inflow direction (IFD) of a fluid flow to flow through said fluid mixing structure (10) and being composed of said at least two fluidic components, and a flow splitter (32) arranged In a space (30) formed by said expansion zone (14) and said retention zone (16) to split said fluid flow in a first sub fluid flow and a second sub fluid flow flowing in a first flow path and a second flow path, respectively, formed in the fluid mixing structure, and to mix said first and second sub fluid flows within said space (30) to generate and discharge a homogenized fluid flow, wherein said flow splitter (32) is arranged and configured to let any flow element of each of said first and second sub fluid flows prior to their mixing have a non-zero average flow component in said inflow direction