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Subel. E
6 questions
Subelement E
Antenna Systems
Section 42
Waveguides-1
Waveguides can be constructed from:
  • Brass.
  • Aluminum.
  • Copper.
  • Correct Answer
    All of the above.
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A microwave transmission line constructed of a center conductor suspended between parallel conductive ground planes is called:
  • Microstrip.
  • Coax.
  • Correct Answer
    Stripline.
  • Waveguide.
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Waveguide theory is based upon:
  • Correct Answer
    The movement of an electromagnetic field.
  • Current flow through conductive wires.
  • Inductance.
  • Resonant charging.
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A waveguide is used at RADAR microwave frequencies because:
  • It is easier to install than other feedline types.
  • It is more rugged than other feedline types.
  • It is less expensive than other feedline types.
  • Correct Answer
    It has lower transmission losses than other feedline types.
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Waveguide theory is based on the principals of:
  • Ohm's Law.
  • High standing waves.
  • Correct Answer
    Skin effect and use of ΒΌ wave stubs.
  • None of the above.
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How is the signal removed from a waveguide or magnetron?
  • With a thin wire called a T-hook.
  • Correct Answer
    With a thin wire called a J-Hook.
  • With a coaxial connector.
  • With a waveguide flange joint.
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