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SPS solid state antenna power combinerSolid state dc-rf converters offer potential improvements in reliability, mass and low voltage operation, provided that anticipated efficiencies in excess of 80 percent can be realized. Field effect transistors offer the greatest potential in the SPS frequency band at 2.45 GHz. To implement this approach it is essential that means be found to sum the power of many relatively low power solid state sources in a low-loss manner, and that means be provided to properly control the phase of the outputs of the large number of solid state sources required. To avoid the power combining losses associated with circuit hybrids it was proposed that the power from multiple solid state amplifiers be combined by direct coupling of each amplifier's output to the radiating antenna structure. The selected power-combining antenna consists of a unique printed (metalized) microstrip circuit on a ceramic type dielectric substrate which is backed by a shallow lightweight aluminum cavity which sums the power of four microwave sources. The antenna behaves like two one-half wavelength slot-line antennas coupled together via their common cavity structure.
Document ID
19820004694
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fitzsimmons, G. W.
(Boeing Aerospace Co. Seattle, WA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Publication Information
Publication: NASA. Johnson Space Center Workshop on Microwave Power Transmission and Reception
Subject Category
Energy Production And Conversion
Accession Number
82N12567
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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