Millimeter wave series interchanger can realize the docking and exchange of millimeter wave products of different series. It adopts air interface and has the characteristics of small size, light weight and high frequency of use. The 1.85 series products operate at a frequency of up to 65GHz, and their interface is compatible with the 2.4 series connector. The operating frequency of 2.92 series products can reach 40GHz, which can be interchangeable with 3.5 series and SMA series products. It is widely used in precision measurement and all kinds of millimeter wave communication equipment.