How does the built-in PCB of CAT5E/CAT6 Unshielded Pass-Through Module improve NEXT?- Cixi Shuaiye Communication Equipment Co., Ltd

1. Principle of PCB design to improve NEXT
The main role of PCB in CAT5E/CAT6 Unshielded Pass-Through Module is to provide an orderly electrical path to reduce mutual interference of signals during transmission. In the network cable, each pair of wires is arranged with a specific twist rate and spacing to reduce NEXT. However, at the connection end, such as the RJ45 interface, these wire pairs need to be separated in order to be inserted into the interface. At this time, the design of PCB is particularly important.

PCB ensures that each signal path has sufficient isolation through precise layout and routing, thereby reducing crosstalk between wire pairs. Specifically, the signal lines on the PCB are designed to a specific width and spacing to match the electrical characteristics of the network cable. In addition, the PCB also uses impedance matching technology to ensure the integrity of the signal during transmission.

2. How PCB Enhances Signal Integrity
In CAT5E/CAT6 Unshielded Pass-Through Module, PCB not only improves signal quality by reducing NEXT, but also improves overall network performance by enhancing signal integrity. Signal integrity refers to the ability of a signal to maintain its original waveform and amplitude during transmission. To achieve this goal, PCB uses a variety of technologies:

Impedance control: The signal lines on the PCB are designed to have specific impedance values to match the impedance of the network cable. This impedance matching reduces signal reflection and distortion, thereby improving signal integrity.
Ground plane design: PCBs typically contain one or more ground planes that provide a low-impedance return path for the signal. This helps reduce electromagnetic interference (EMI) and radio frequency interference (RFI), further protecting signal integrity.
Decoupling capacitors: On PCBs, decoupling capacitors are used to stabilize the power supply voltage and reduce the impact of power supply noise on the signal. This helps improve signal stability and clarity.
3. Combining the advantages of CAT5E/CAT6 network cable characteristics
CAT5E and CAT6 network cables support Gigabit and 10 Gigabit Ethernet transmission, respectively, and have different electrical and mechanical characteristics. CAT5E network cable has a maximum bandwidth of 100MHz and supports 1000BASE-T transmission; while CAT6 network cable has a higher bandwidth (250MHz) and supports 10GBASE-T transmission. In the CAT5E/CAT6 Unshielded Pass-Through Module, the design of the built-in PCB fully considers these characteristics:

Compatibility: The design of the PCB ensures that the module is compatible with CAT5E and CAT6 network cables and can be used on network cables of different specifications without modification.
Performance improvement: By optimizing NEXT and enhancing signal integrity, the PCB enables the CAT5E/CAT6 Unshielded Pass-Through Module to fully realize the performance potential of the network cable, especially in high-speed data transmission environments.
Reliability enhancement: The precise design and manufacturing process of the PCB improves the reliability and durability of the module and reduces network failures caused by poor connections or signal interference.