Communications: radio wave antennas – Antennas – With grounding structure
Patent
1995-06-12
1999-07-13
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With grounding structure
343727, 343833, 343893, H01Q 2100
Patent
active
059233028
ABSTRACT:
A full coverage antenna module provides radiation in 360.degree. in a weight, space and cost effective manner. The antenna module includes two back-to-back electronically scanned (.+-.60.degree.) antenna arrays and an end-fire array mounted on at least one of a top surface and a bottom surface of the module. The end-fire array is bi-directional, may be scanned by .+-.30.degree. in both of its directions, and serves as a gap filler to provide coverage not supplied by the side arrays. The end-fire array may include a plurality of rows of antenna elements, adjacent rows of which are separated by an offset width. Preferably, the antenna elements in the rows have a non-periodic inter-element spacing. The antenna elements in the end-fire array may be of different types, for example, both monopoles and dipoles may be used in the same end-fire array. If monopoles are used, they are preferably mounted on a corrugated ground plane.
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Hoover William F.
Waterman Timothy G.
Northrop Grumman Corporation
Wimer Michael C.
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