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The horizontal axis of the graph labeled, broadside (theta equals 90 degrees) while the vertical axis labeled, z. The z-axis in d B ranges from negative 30 to 0.

The array consists of six elements with equal spacing d. A main lobe with five side lobes represents the normalized array pattern of the excited six-element array. The main lobe beam is in the direction broadside to the array axis. The half beam width of the main lobe labeled, 17.2 degrees. The normalized array factor at theta labeled, F sub start expression a n end expression of theta.