Coaxial Cables (RF)
1. What are the Basic Structure of Coaxial Cables (RF)?
RF coaxial cable (RF Coaxial Cable) consists of four core parts:
Inner Conductor: usually made of copper or silver-plated copper, responsible for signal transmission, the structure can be solid wire or multi-strand twisted wire;
Insulation Layer: dielectric material (such as polyethylene, polytetrafluoroethylene) wrapped around the inner conductor, used for electrical isolation and supporting the structure;
Outer Conductor: made of copper braided mesh or aluminum foil, plays an electromagnetic shielding role;
Outer Sheath: the outermost protective material (such as PVC, PE) to resist environmental erosion.
2. What are Coaxial Cables (RF) Used for?
RF coaxial cable is widely used in high-frequency signal transmission scenarios, including:
Wireless communication (such as base stations and satellite communications);
Broadcast and television signal transmission;
Test equipment and radar systems;
Consumer electronics (such as satellite TV reception).
3. What are the Types of Coaxial Cables (RF)?
Divided into two categories according to impedance value:
50Ω Cable: mainly used for digital signal transmission and RF energy transmission (such as baseband signal);
75Ω Cable: commonly used in cable television (CATV) and video signal transmission.
4. What are the Key Performance Characteristics of Coaxial Cables (RF)?
Low Loss: coaxial structure and high-quality materials reduce signal attenuation;
High shielding: the outer conductor effectively suppresses electromagnetic interference (EMI);
Wideband Support: covers the frequency range of 500kHz to 18GHz;
Durability: the outer sheath material adapts to complex environments (such as temperature changes and mechanical wear).
5. What are the Technical Parameters of Coaxial Cables (RF)?
Attenuation (Insertion Loss): increases with increasing frequency, in dB/length;
Bending Radius: the minimum bending radius to ensure performance;
Connector Matching: needs to be adapted to RF connectors such as SMA and BNC to ensure impedance continuity;
Propagation Speed: the ratio to the speed of light affects signal delay.
6. What is the Development Trend of Coaxial Cables (RF)?
With the popularization of 5G communications and satellite technology, RF coaxial cables are developing towards higher frequency bands (such as millimeter waves), lower losses, and lightweight materials.