NDLI: Wfl: microwave applications of thin ferroelectric films

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Wfl: microwave applications of thin ferroelectric films

Content Provider	NASA Technical Reports Server (NTRS)
Author	Romanofsky, Robert
Copyright Year	2013
Description	We have developed a family of tunable microwave circuits, operating from X- through Ka-band, based on laser ablated BaxSr1-xTiO films on lanthanum aluminate and magnesium oxide substrates. Circuits include voltage controlled oscillators, filters, phase shifters and antennas. A review of the basic theory of operation of these devices will be presented along with measured performance. Emphasis has been on low-loss phase shifters to enable a new phased array architecture. The critical role of phase shifter loss and transient response in reflectarray antennas will be discussed. The Ferroelectric Reflectarray Critical Components Space Experiment was launched on the penultimate Space Shuttle, STS-134, in May of 2011. It included a bank of ferroelectric phase shifters with two different stoichiometries as well as ancillary electronics. The experiment package and status will be reported. In addition, unusual results of a Van der Pauw measurement involving a ferroelectric film grown on buffered high resisitivity silicon will be discussed.
File Size	5779992
Page Count	34
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140000250
Archival Resource Key	ark:/13960/t51g5pr67
Language	English
Publisher Date	2013-06-02
Access Restriction	Open
Subject Keyword	Communications And Radar Thin Films Phase Shift Circuits Dielectric Loss Lanthanum Oxides Ferroelectricity Ferroelectric Materials Magnesium Oxides Reflector Antennas Microwave Circuits Barium Titanates Antenna Arrays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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