Transmission Lines Flashcards
is a conducting device used to transfer energy in the form of
electromagnetic waves from a source (generator) to a load.
Transmission Line
Commonly used transmission lines
two-wire open line;
twisted-pair line;
shielded pair line;
coaxial line;
waveguide;
optical fiber.
properties that affect transmission
the bandwidth
the attenuation
the noise or interference
consists of two parallel conductors that are spaced a few centimeters apart and that are held by spacers placed at regular intervals
two-wire open line
is called twin-lead line when the parallel conductors are insulated
by a dielectric material,
two-wire line
consists of two conductors sheathed in an insulating material and twisted together to make a flexible line
Twisted Pair Line
consists of two parallel conductors surrounded and separated
by solid dielectric material
shielded pair line
is widely used for cable television. It comes in two types: rigid and
flexible.
coaxial line
is a transmission medium that confines and guides propagating
electromagnetic waves.
waveguide
optical fiber is designed specifically for transmitting light, which can be
modeled as an electromagnetic wave.
optical fiber
In alternating-current (AC) circuits, the resistance of a component to the flow of
current is called
impedance
most important property of a transmission line is
characteristic impedance
What happens when Zo is not equal ZL
Impedance mismatch
