Discussion
What does an axial ratio of unity indicate?
Answer: C
Axial ratio is the ratio of the major to the minor axis of the polarisation ellipse, so unity, or zero decibels, means the ellipse is a circle. An infinite ratio means linear polarisation. It says nothing about the amount of power radiated or about the beamwidths in the two planes, which are separate properties. Keeping the polarisation ellipse in mind, with its two axes and its tilt, makes every polarisation quantity straightforward to interpret.
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