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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 10 elements with a separation d equals lambda over 2. A main lobe with two side lobes represents the normalized array pattern of excited ten-element array. The half beam width of the main lobe labeled, 48.7 degrees. The half beam width of the first side lobe labeled, 15.5 degrees. The second side lobe beam is in the direction broadside to the array axis. The half beam width of the second side lobe labeled, 10.2 degrees. The normalized array factor at theta labeled, F sub start expression a n end expression of theta.