Module 9.6: Vertical Array

Given: A six-element array of equally spaced vertical dipole antennas.

	Q1.  If the dipoles are each half-wavelength long, which pattern best characterizes the elevation pattern of an individual dipole?       Pattern 1 (blue).       Pattern 2 (red circle).       Pattern 3 (multi-lobe pattern).
	Q2.  Which pattern best characterizes the azimuth pattern of an individual dipole?       Pattern 4 (blue).       Pattern 5 (red circle).       Pattern 6 (multi-lobe pattern).
	Q3.  Assuming the array is fed uniformly in amplitude and phase and the inter-element spacing is /2, which pattern best characterizes the elevation pattern of the array factor of the six-element array? [NOTE: The array factor pertains to the array alone, regardless of the specific identity of the individual antenna elements.]       Pattern 1 (blue).       Pattern 2 (red circle).       Pattern 3 (multi-lobe pattern).
	Q4.  Which pattern best characterizes the azimuth pattern of the array factor of the six-element array?       Pattern 4 (blue).       Pattern 5 (red circle).       Pattern 6 (multi-lobe pattern).
	Q5.  Which pattern best characterizes the elevation pattern of the entire six-element dipole array?       Pattern 1 (blue).       Pattern 2 (red circle).       Pattern 3 (multi-lobe pattern).
	Q6.  Which pattern best characterizes the azimuth pattern of the entire six-element dipole array?       Pattern 4 (blue).       Pattern 5 (red circle).       Pattern 6 (multi-lobe pattern).

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Fawwaz T. Ulaby, Fundamentals of Applied Electromagnetics. Prentice Hall, Upper Saddle River, New Jersey, 2001. Copyright © 2001 Prentice Hall.

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