antenna directivity diagram

antenna directivity diagram

[an′ten·ə di·rek′tiv·əd·ē ′dī·ə‚gram]
(electromagnetism)
Curve representing, in polar or cartesian coordinates, a quantity proportional to the gain of an antenna in the various directions in a particular plane or cone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.