Coaxial cables are crucial for transmitting high-frequency electrical signals with minimal interference. This article offers an overview of their specifications and technical data.
1. Structure of Coaxial Cables
A coaxial cable comprises four main parts:
2. Key Specifications
2.1 Characteristic Impedance
Measured in ohms, common values are 50 Ω (RF applications), 75 Ω (video and CATV), and 93 Ω (specific data systems).
2.2 Attenuation
Signal loss along the cable, measured in dB/m, is affected by frequency, length, and cable construction.
2.3 Capacitance and Inductance
Capacitance (pF/m) impacts signal speed and impedance; inductance (H/m) influences impedance and signal – carrying capacity.
2.4 Maximum Voltage Rating
Determined by the dielectric and construction, it indicates the highest safe voltage the cable can carry.
3. Technical Data Sheets
They detail a cable’s performance:
4. Types of Coaxial Cables
5. Applications of Coaxial Cables
Used in telecommunications (telephone and cellular networks), broadcasting (CATV and radio), data transmission (Ethernet and high – speed links), and industrial/military systems.
6. Choosing the Right Coaxial Cable
Consider application requirements, cable length, environmental conditions, and cost – effectiveness when selecting a coaxial cable.
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