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Extra-Study/pages/E9G.md
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E9G The Smith chart

  • E9G01 (A) Which of the following can be calculated using a Smith chart? #card
    • A. Impedance along transmission lines
    • B. Radiation resistance
    • C. Antenna radiation pattern
    • D. Radio propagation
  • E9G02 (B) What type of coordinate system is used in a Smith chart? #card
    • A. Voltage circles and current arcs
    • B. Resistance circles and reactance arcs
    • C. Voltage chords and current chords
    • D. Resistance lines and reactance chords
  • E9G03 (C) Which of the following is often determined using a Smith chart? #card
    • A. Beam headings and radiation patterns
    • B. Satellite azimuth and elevation bearings
    • C. Impedance and SWR values in transmission lines
    • D. Point-to-point propagation reliability as a function of frequency
  • E9G04 (C) What are the two families of circles and arcs that make up a Smith chart? #card
    • A. Inductance and capacitance
    • B. Reactance and voltage
    • C. Resistance and reactance
    • D. Voltage and impedance
  • E9G05 (A) Which of the following is a common use for a Smith chart? #card
    • A. Determine the length and position of an impedance matching stub
    • B. Determine the impedance of a transmission line, given the physical dimensions
    • C. Determine the gain of an antenna given the physical and electrical parameters
    • D. Determine the loss/100 feet of a transmission line, given the velocity factor and conductor materials
  • E9G06 (B) On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate? #card
    • A. Prime axis
    • B. Reactance axis
    • C. Impedance axis
    • D. Polar axis
  • E9G07 (D) On the Smith chart shown in Figure E9-3, what is the only straight line shown? #card
    • A. The reactance axis
    • B. The current axis
    • C. The voltage axis
    • D. The resistance axis
  • E9G08 (C) How is a Smith chart normalized? #card
    • A. Reassign the reactance axis with resistance values
    • B. Reassign the resistance axis with reactance values
    • C. Reassign the prime center’s impedance value
    • D. Reassign the prime center to the reactance axis
  • E9G09 (A) What third family of circles is often added to a Smith chart during the process of designing impedance matching networks? #card
    • A. Constant-SWR circles
    • B. Transmission line length circles
    • C. Coaxial-length circles
    • D. Radiation-pattern circles
  • E9G10 (D) What do the arcs on a Smith chart represent? #card
    • A. Frequency
    • B. SWR
    • C. Points with constant resistance
    • D. Points with constant reactance
  • E9G11 (B) In what units are the wavelength scales on a Smith chart calibrated? #card
    • A. In fractions of transmission line electrical frequency
    • B. In fractions of transmission line electrical wavelength
    • C. In fractions of antenna electrical wavelength
    • D. In fractions of antenna electrical frequency