Drawbacks of the normal mode of radiation in helical antenna

drawbacks-of-the-normal-mode-of-radiation-in-helical-antenna

Drawbacks of the normal mode of radiation in helical antenna are _______

A. low radiation efficiency and narrow bandwidth

B. high radiation efficiency and narrow bandwidth

C. low radiation efficiency and Broad bandwidth

D. high radiation efficiency and broad bandwidth

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This intriguing question comes from Frequency Independent Antenna topic in division Frequency Independent Antenna of Antennas

Correct option is A. low radiation efficiency and narrow bandwidth

Explanation: In normal mode, the radiation is perpendicular to axis. The radiation pattern of a helical antenna is a combination of small dipole and loop antenna. In normal mode of radiation, it provides narrow bandwidth and low radiation efficiency.