Coaxial cable is a cylindrical cable that is composed of an inner core, insulator, shield and outer cover. It is specifically designed for use in applications requiring high quality and interference free radio frequency signals. A coaxial cable is commonly used to connect antennas with radio transmitters and receivers, for cable internet connections, in cable television distribution systems, connecting televisions to external antennas, in closed circuit television systems, etc.
Coaxial cables vary in design according to their end use. Here are some of the different types of coaxial cables:
Hard-line coaxial cable: Hard-line coaxial cable is constructed using copper, silver, aluminum or steel for the center conductor and is the most heavy-duty coax cable. This cable is used for radio transmitters requiring high signal strength such as military signals or broadcasting radio between a ground-level transmitter and an antenna or aerial receiver.
Tri-axial cable: Tri-axial cable is used to prevent data loss and is frequently used in the broadcasting industry. This type of cable is more expensive than a standard coaxial cable but provides greater bandwidth and less interference. A tri-axial cable transmits video signals as well as service signals.
Twin-axial cable: Twin-axial cable has two central conductors instead of one. It is used for high-speed and short-range signaling applications such as computer systems and other mid-range systems.
Semi-rigid coaxial cable: Semi-rigid coaxial cable comes with a PTFE-supported dielectric and a shield made of a solid conductor. This cable performs well at high frequencies. Because of its hard shielding metal, a semi-rigid cable is perfect for microwave transmission.
Rigid coaxial cable: This type of cable contains two copper tubes and a PTFE dielectric buffer. A rigid cable is much bigger than a semi-rigid cable. It has the power and capacity to operate TV and FM frequencies with multi-channel transmission.
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