A method for producing a hydrorefining catalyst has the steps of preparing an impregnation solution containing molybdenum, phosphorus, cobalt andor nickel, and citric acid, bringing a carrier into contact with the impregnation solution, and then calcinating the carrier in an oxidizing atmosphere at a temperature at which citric acid is removed. The MIMO detector is provided on the side of the receiver of the wireless communication. Each waveguide includes an angled input surface at least some of which are oriented at different angles. A CMC cap is located on the head of the bolt and secured to the bolt by a mechanical device.