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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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