Transmission Lines Fill in the Blanks

Phasor sum

The total voltage at any point on a transmission line is the ______________ of the incident and the reflected voltage.

In phase

The incident voltage and the incident current are always _______________ along a transmission line.

Leading

The phase of the incident voltage and incident current varies linearly with line length in electrical degrees and increases in ____________________ direction from load toward the generator.

Inductive

Proceeding from a voltage minimum, for a distance of 90 electrical degrees toward the generator, the reactive component exhibited by the line will be ___________________

Lagging

The phase of the reflected voltage and the reflected current varies linearly with line length in electrical degrees and increases in ________________ direction from load toward the generator.

Voltage standing waves

From the ______________________ one should be able to label the inductive and capacitive sections of the line as well as the pure resistive points.

Nonpower consuming loads

The magnitude of the reflection coefficient is always unity for _________________________ loads.

Zo

The input impedance of a line terminated in Zo is always equal to _______________.

Lossless

The amplitude of incident voltage, incident current, reflected voltage and reflected current each have a constant value up and down the transmission line if the line is ______.

Imin

Emax and __________occur together at the same point on a line.

Zero

The magnitude of the reflection coefficient is always ________________ if the line is terminated in its characteristic impedance.

Reflection Coefficient

From the ____________________, the magnitude and phase relationship of the reflected and incident voltages at the load can be determined.

Voltage maximums and voltage minimums

Voltage Maximum

Voltage minimum

If a line has standing waves, the only pure resistive impedance points are located at the _________________ and the ___________________. If the pure resistive impedance point is greater than Zo, it is at a ______________________. If the pure resistive impedance point is less than Zo, it is at a _______________________.

Flat

The phase of the total voltage and the total current varies linearly with line length in electrical degrees only if the line is __________________.

Pure inductive reactance

Pure capacitive reactance

The input impedance of a shorted line varies as the tangent of the line length in electrical degrees and is __________________________ for lengths from zero to 90, and ________________________ for lengths from 90 to 180, etc.

Lossless

The standing wave ratio on a ________________ line is everywhere the same.

180°

The input impedance of a transmission line repeats for every _____________ of line length, if the line is lossless.

180° out of phase

The reflected voltage and the reflected current are always __________________ along a transmission line.

Capacitive

Proceeding from a voltage minimum, for a distance of 90 electrical degrees toward the load, the reactive component exhibited by the line will be ____________________

Imax

Emin and __________ occur together at the same point on a line.

180

For every 180 of line length, the phase of the total voltage or total current changes __________________ , regardless of termination.

Pure capacitive

Pure inductive

The input impedance of an open line varies as the cotangent of the line length in degrees and is ______________________________ for lengths from zero to 90, and _________________________ for lengths from 90 to 180, etc.

Phasor sum

The total current at any point on a transmission line is the _______________ of the incident and the reflected current.

Inductive

Proceeding from a voltage minimum, for a distance of 90 electrical degrees toward the generator, the reactive component exhibited by the line will be ____

1 angle 0

The reflection coefficient (in polar form) of a transmission line terminated in an open circuit

1 angle 180

The reflection coefficient (in polar form) of a transmission line terminated in an short circuit