How does the performance of Fakra cables affect the stability of automotive electronic systems?

How does the performance of Fakra cables affect the stability of automotive electronic systems?

The various properties of Fakra cables have a significant impact on the stability of automotive electronic systems, as follows:

Impedance matching: Fakra cables have precise characteristic impedance. If the impedance matching is poor, the signal will reflect during transmission, causing signal distortion and attenuation, which affects the accurate transmission of various signals in automotive electronic systems. For example, the high-frequency signal transmission of millimeter wave radar in ADAS systems may be interfered with, resulting in a decrease in the detection accuracy of target objects by the radar, and thus affecting the reliability of adaptive cruise control, automatic emergency braking and other functions.

Shielding performance: Using coaxial cable structure and metal shielding mesh, it can effectively resist external electromagnetic interference and radio frequency interference, while preventing internal signals from radiating outward. If the shielding performance is poor, sensitive signals in the automotive electronic system are easily affected by external interference, such as the GPS signal of the navigation system may be interfered by strong electromagnetic signals nearby, resulting in inaccurate positioning; Or the signal of the in vehicle communication system may be interrupted or incorrect, affecting the normal use of the vehicle networking function.

Transmission frequency: capable of meeting the various high-speed data transmission requirements in modern vehicle communication systems. If the transmission frequency range of the cable is insufficient, there may be problems such as data loss and increased delay when transmitting high-speed data such as high-definition video signals, 5G communication signals, or V2X signals for vehicle networking, which will affect the multimedia playback quality of the information entertainment system and the real-time and reliability of the vehicle's communication with the outside world.

Insertion loss and return loss: Low insertion loss ensures minimal power loss during signal transmission, while low return loss reduces signal reflection. If these two parameters are not well controlled, it will lead to a decrease in signal strength and quality, affecting system stability. In satellite radios, significant insertion loss may weaken the received broadcast signal and cause noise in the sound; Return loss is likely to cause severe signal reflection and interfere with the transmission of other signals.

Mechanical performance: The lock buckle has high retention and error prevention capabilities, and can adapt to vibrations and bumps during vehicle operation, ensuring that the connection will not loosen or fall off. At the same time, cable materials have high strength and wear resistance, and can withstand a certain degree of tension, bending, and compression. If the mechanical performance is poor, under the long-term vibration of the vehicle, the cable connection may loosen, leading to signal interruption; Or the outer layer of the cable may be worn, the internal conductor may be exposed, causing faults such as short circuits, which can affect the normal operation of the automotive electronic system.

Waterproof and anti-corrosion performance: The wire harness shell material is made of high-strength plastic and rubber, which has good waterproof and anti-corrosion capabilities. In harsh environments with high humidity, dust, or chemical substances, if cables do not have good waterproof and anti-corrosion performance, they may be damaged due to water ingress or corrosion, resulting in abnormal signal transmission. For example, antenna cables installed outside vehicles may malfunction due to rainwater erosion, affecting wireless communication functions.