For a helical antenna radiation, the pitch angleα should be _____(a) 0 < α < 90(b) α=0(c) α=90(d) α=0 or 90I had been asked this question during an online exam.This interesting question is from Frequency Independent Antenna topic in portion Frequency Independent Antenna of Antennas

For a helical antenna radiation, the pitch angleα should be _____(a)

1.	For a helical antenna radiation, the pitch angleα should be _____(a) 0 < α < 90(b) α=0(c) α=90(d) α=0 or 90I had been asked this question during an online exam.This interesting question is from Frequency Independent Antenna topic in portion Frequency Independent Antenna of Antennas
Answer» The correct answer is (a) 0 < α < 90 Easiest EXPLANATION: The radiation pattern of the helical ANTENNA is a combination of the small DIPOLE and loop antenna. Pitch angle is the TANGENT of RATIO between the spacing and the circumference of the antenna. α=0, then helical antenna becomes loop antenna. α=90, the helical antenna becomes linear antenna.

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