Page:Electronics Technician - Volume 7 - Antennas and Wave Propagation - NAVEDTRA 14092.pdf/115

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ASSIGNMENT 3

Textbook Assignment: "Transmission Lines and Waveguides," chapter 3, pages 3-1 through 3-32.

3-1. A transmission line is designed to perform which of the following functions?

  1. Disperse energy in all directions
  2. Detune a transmitter to match the load
  3. Guide electrical energy from point to point
  4. Replace the antenna in a communications system

3-2. The conductance value of a transmission line represents which of the following values?

  1. Expected value of current flow through the insulation
  2. Expected value of voltage supplied by the transmitter
  3. Value of the lump and distributed constants of the line divided by impedance
  4. Value of the lumped constants of the line as seen by the source and the load

3-3. Distributed constants in a transmission line are distributed in which of the following ways?

  1. Between ground and any single point on the line
  2. Along the length of the line
  3. According to the thickness of the line
  4. According to the cross-sectional area of the line

3-4. Leakage current in a two-wire transmission line is the current that flows through what component?

  1. The resistor
  2. The inductor
  3. The insulator
  4. The conductor

3-5. Conductance is the reciprocal of what electrical property?

  1. Inductance
  2. Resistance
  3. Capacitance
  4. Reciprocity

3-6. A transmission line that has current flowing through it has which of the following fields about it?

  1. Electric only
  2. Magnetic only
  3. Both electric and magnetic
  4. Capacitive

3-7. A measurement of the voltage to current ratio (EinIout at the input end of a transmission ine is called the

  1. input-gain. rate
  2. voltage-gain ratio
  3. output impedance
  4. input impedance

3-8. The characteristic impedance (2.) of a transmission. line is calculated by using which of the following ratios?

  1. Rsource to Rload of the line
  2. Imax to Imin at every point along the line
  3. E to I at every point along the line
  4. Ein to Eout of the line

11

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