In which of the following mode, the radiation is perpendicular to the axis of helical antenna?(a) Normal mode(b) Axial mode(c) Beam mode(d) End-fire modeThe question was posed to me in homework.My question is based upon Frequency Independent Antenna in section Frequency Independent Antenna of Antennas

In which of the following mode, the radiation is perpendicular to the

1.	In which of the following mode, the radiation is perpendicular to the axis of helical antenna?(a) Normal mode(b) Axial mode(c) Beam mode(d) End-fire modeThe question was posed to me in homework.My question is based upon Frequency Independent Antenna in section Frequency Independent Antenna of Antennas
Answer» The correct CHOICE is (a) Normal MODE Explanation: In normal mode, the RADIATION is perpendicular to axis. It is also known as perpendicular mode. In this the antenna DIMENSIONS are smaller COMPARED to the wavelength. Axial mode is also known as beam mode or end-fire mode. In Axial mode of radiation, the radiation is in end-fire direction along the helical axis.

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