Antenna Effect

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Antenna Effect

A weakening of the effectiveness of the directional properties of a loop antenna by the capacitance of the loop to the ground. Also called height effect .

In usual direction-finding

practice on ground waves, antenna effect would be manifested: (a) if in phase, by an angular displacement of the nulls from 180° displacement and (b), if in quandrature, by a residual signal obscuring the nulls. The in-phase effect is often used to eliminate the 180° ambiguity (i.e., to permit sense finding).

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use