Definition
A flexible coaxial cable is a type of RF transmission cable with excellent bending performance. It consists of a concentric structure of conductor, insulation, and shielding, and is designed to maintain stable electrical performance even under repeated bending and in complex installation environments. Compared with semirigid coaxial cables, it offers greater mechanical flexibility, making it suitable for applications where routing requirements are demanding.
Materials
1. Inner Conductor: Commonly made of silverplated copper or tinned copper to ensure conductivity and stable signal transmission.
2. Insulation: Typically uses PTFE, polyethylene (PE), or lowloss foamed materials to maintain impedance and electrical properties.
3. Shielding: Constructed from braided copper, tinned copper wire, or composite layers of foil and braid to minimize electromagnetic interference.
4. Outer Jacket: Flexible PVC, FEP, or wearresistant polyurethane, providing durability and safety during bending and operation.
Characteristics
1. High Flexibility: Can withstand repeated bending, allowing easy installation and routing.
2. Low Loss: Ensures minimal attenuation in highfrequency signal transmission.
3. Strong Shielding: Multilayer shielding effectively prevents external interference.
4. Environmental Adaptability: Optional jackets with resistance to high temperatures, chemicals, or abrasion.
5. Stable Impedance: Maintains standard impedance values (commonly 50Ω or 75Ω) to ensure reliable signal quality.
Applications
1. Communication Systems: Used in radio stations, base stations, and networking equipment.
2. Testing and Measurement: Serves as highfrequency interconnection between test instruments and antennas.
3. Military and Aerospace: Transmits radar, navigation, and satellite signals in complex cabling environments.
4. Medical Equipment: Applied in ultrasound, imaging, and other highfrequency medical systems.
5. Consumer Electronics: Used in RF modules, televisions, and audiovisual equipment.
