Topic: Electromagnetics
In an axial mode operation of a helical antenna, maximum field radiated by the antenna is
- A. along the axis of the helical antenna
- B. in a plane normal to the helix axis
- C. in both axial and normal planes
- D. none of the above
Answer: A. along the axis of the helical antenna
Explanation: In the axial mode of operation of a helical antenna, the radiation pattern is highly directional and the maximum field is radiated along the axis of the helix. (Note: the official explanation contained a typo mentioning normal mode, but the answer key (a) corresponds to the axial direction as defined in standard antenna theory).