A commercially available axial mode helix antenna has six turns made of 0:95-cm aluminum tubing supported by fiberglass insulators attached to a 3.8-cm aluminum shaft. The band of operation is 300 to 520 MHz. The mechanical characteristics are as follows: length of helix, 118 cm; diameter of helix (center to center), 23.2 cm; and ground screen diameter, 89 cm.
(a) Determine the pitch angle α.
(b) Compute the gain in decibels at edges of the frequency band of operation
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