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In which of the following modes, the dimension of the helical antenna circumference is greater than the wavelength?

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In which of the following modes, the dimension of the helical antenna circumference is greater than the wavelength?

(a) Normal mode

(b) Axial mode

(c) Conical mode

(d) Beam mode

The question was posed to me in examination.

The doubt is from Frequency Independent Antenna topic in chapter Frequency Independent Antenna of Antennas

1 Answer

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Best answer
Correct answer is (c) Conical mode

The best I can explain: In Axial mode of radiation, the dimensions of antenna are approximately in the order of the wavelengths. In normal mode, dimensions of antenna are smaller compared to wavelength. In conical mode, the circumference of the antenna is greater than the wavelength.

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