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What is the pitch angle of the helical antenna to become a loop antenna?

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What is the pitch angle of the helical antenna to become a loop antenna?

(a) 90

(b) 0

(c) 45

(d) 60

I had been asked this question in an online quiz.

Query is from Frequency Independent Antenna in section Frequency Independent Antenna of Antennas

1 Answer

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Best answer
Right answer is (b) 0

Easiest explanation: C is the circumference and L is the length, s is the spacing between turns.

When pitch angle α=0, the separation becomes zero and length will be equal to circumference of the loop. Hence it acts as a loop antenna.

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