The high-performance amplitude and phase stabilization test cable assembly is mainly used to cooperate with the test application of vector network analyzer (VNA). Its main characteristics are: it has extremely stable voltage standing wave ratio and insertion loss in the range of DC ~ 67ghz; It has extremely excellent mechanical phase stability and connection repeatability. The port adopts NMD connector and has a solid and lightweight mechanical structure, which can withstand external forces such as bending, extrusion, twisting and stretching and maintain reliable performance.