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QUESTIONS AND ANSWERS

  • Q. What is a coaxial connector?
  • A. Component of a coaxial transmission line.

  • Q. What is a transmission line?
  • A. A transmission line is a system of conductors used to transfer signal from one source to the other. There are many variations of a transmission line

  • Q. What is a coaxial transmission line, and what types are there?
  • A. A coaxial transmission line is a transmission line of any given length which employs a round center conductor which is insulated from the outer conductor. The insulating material may be either a plastic dielectric material, air, or a combination of both. The perfect dielectric is air, but the inner conductor must be supported, so therefore when using air as a dielectric, there must be some support, generally called a dielectric bead. There are three basic types of coaxial transmission lines:
  • Airline: This type which uses an air dielectric along with mechanical support. Airline is commonly employed in laboratory standard measurements, and high precision test equipment.
  • Semi-Rigid Cable: This type uses plastic as a dielectric and has a solid outer conductor. Semi-Rigid is used where superior electrical parameters are required, but some degree of mechanical flexibility.
  • Flexible Cable: This type also uses a braided outer conductor, and is covered by a protective sleeve known as the jacket. Flexible cables are used when ease of mechanically mating the system is mandatory.

  • Q. What is an NMD Connector?
  • A. The NMD connector is a test-port connector used on network analyzers. Common connectors used are 3.5 mm & 2.4 mm plug connectors. NMD connectors include a large threaded body that is designed to stabilize the test port during testing. NMD stands for " Network Measurments Division"

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