Missing imageHorn_antenna_apparent_phase_center.png In horn and other directional antennas, the apparent phase center is used since radiation is only emitted at certain angles.
In
antenna design theory, the
phase center is the point from which the electromagnetic radiation spreads spherically outward, with the phase of the signal being equal at any point on the sphere.
Apparent phase center is used to describe the phase center in a limited section of the
radiation pattern.
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