Classification of twisting methods of shielded twisted pair

　　The twisting method of shielded twisted pair mainly involves the arrangement of the core and the degree of twisting. The following is a detailed explanation of the twisting method of shielded twisted pair:

　　Classification of stranding methods

　　The twisting methods of shielded twisted pair are mainly divided into two types: coaxial twisting and reverse twisting, depending on the degree of twisting.

　　Coaxial stranding: Two pairs of wires are stranded in the same stranding unit. The shielding performance of this stranding method is relatively poor, because the electromagnetic interference between the wire pairs may not be effectively cancelled.

　　Reverse twisting: Two pairs of wires are twisted in sequence in two adjacent twisted units. This twisting method provides better shielding performance because it helps reduce electromagnetic interference between wire pairs.

　　Second, the structural characteristics of shielded twisted pair

　　The shielded twisted pair usually includes conductors, insulating layers, shielding layers and sheaths in structure. Among them, the shielding layer is the key to distinguish the shielded twisted pair from the unshielded twisted pair (UTP). The shielding layer can be made of aluminum foil, copper wire mesh and other materials to reduce the impact of external electromagnetic interference on signal tranSMission.

　　III. Effect of stranding methods on performance

　　The twisting method not only affects the shielding performance of the shielded twisted pair, but also affects its transmission performance and usage scenarios.

　　Shielding performance: The shielding performance of reverse twisting is better than that of coaxial twisting because it can reduce electromagnetic interference more effectively.

　　Transmission performance: The rationality of the stranding method helps to maintain the integrity of the signal and reduce signal attenuation and distortion.

　　Usage scenarios: Different types of shielded twisted pairs are suitable for different network application scenarios, such as Cat5e, Cat6, Cat6a, and Cat7 models, which are suitable for different transmission rates and bandwidth requirements.

　　To sum up, the twisting method of shielded twisted pair is one of the key factors affecting its performance. When selecting and using shielded twisted pair, it is necessary to choose the appropriate twisting method and model according to the specific application scenarios and requirements.