umbrella antenna

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umbrella antenna

[əm′brel·ə an‚ten·ə]
(electromagnetism)
Antenna in which the wires are guyed downward in all directions from a central pole or tower to the ground, somewhat like the ribs of an open umbrella.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.