The stable phase cable assembly is a rf cable assembly which transmits the dominant frequency signal with relatively stable phase when the external conditions (such as ambient temperature, mechanical stress, etc.) change. Phase stable cable components are divided into mechanical phase stable and temperature phase stable. Temperature phase stabilization is to reduce the phase change of the product by selecting suitable cable structure and superior cable material and compensating each other of various materials. Mechanical phase stabilization is mainly the use of appropriate design structure form, so that the inner conductor, insulator, outer conductor structure in bending is to maintain stability between each other, to achieve the requirements of mechanical phase stabilization. The stable phase cable assembly has the characteristics of wide frequency band, low standing wave, low loss, stable phase, good shielding performance, good flexibility and so on. The stable phase cable components are mainly used in the fields of ground radar array, aerospace radar and ship radar, satellite, mobile communication and high precision instrument measurement line.