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Spiral slotted phased antenna arrayA flush mounting, cavity-backed, dual orthogonal slot antenna for aircraft and space vehicles is described. Improved radiation pattern characteristics are obtained by making the spiral slot pattern elliptical in the aperture plane. A cavity and a flanged aperture plate are configured such that one slot pair is orthogonal with respect to another slot pair within the aperture plate. Coaxial split-tube baluns are used to drive the junctions between corresponding slot pairs. An optional cavity dielectric is provided and a drive coupling arrangement includes a four port comparator hybrid having sum and difference ports respectively, for alternate excitation to produce a single lobe or a double lobe pattern with null. Switching apparatus is provided to connect a common terminal to either of the ports.
Document ID
19820019682
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Ellis, H., Jr. (Rockwell International Corp. Downey, Calif., United States)
Date Acquired
September 4, 2013
Publication Date
February 9, 1982
Subject Category
Communications And Radar
Accession Number
82N27558
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,315,266|NASA-CASE-MSC-18532-1
Patent Application
US-PATENT-APPL-SN-172099

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