Amateur Extra Class: 2020–2024
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E9C01:

What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

  1. Cardioid
  2. Omni-directional
  3. A figure-8 broadside to the axis of the array
  4. A figure-8 oriented along the axis of the array
E9C01 E9C02 E9C03 E9C04 E9C05 E9C06 E9C07 E9C08 E9C09 E9C10 E9C11 E9C12 E9C13 E9C14