NDLI: Current status of thin film (ba,sr)tio3 tunable microwave components for rf communications

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Current status of thin film (ba,sr)tio3 tunable microwave components for rf communications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Mueller, C. H. Romanofsky, R. R. Warner, J. D. Ramesh, R. VanKeuls, F. W. Canedy, C. L. Miranda, F. A.
Copyright Year	2000
Description	The performance of proof-of-concept ferroelectric microwave devices has been moving steadily closer to the level needed for satellite and other rf communications applications. This paper will review recent progress at NASA Glenn in developing thin film Ba(x)Sr(1-x)TiO3 tunable micro-wave components for these applications. Phase shifters for phased array antennas, tunable filters and tunable oscillators employing microstrip and coupled microstrip configurations will be presented. Tunabilities, maximum dielectric constants, and phase shifter parameters will be discussed (e.g., coupled microstrip phase shifters with phase shift over 200 deg at 18 GHz and a figure of merit of 74.3 deg/dB). Issues of post-annealing, Mn-doping and Ba(x)Sr(1-x) TiO3 growth on sapphire and alumina substrates will be covered. The challenges of incorporating these devices into larger systems, such as yield, variability in phase shift and insertion loss, and protective coatings will also be addressed.
File Size	563181
File Format	PDF
Language	English
Publisher Date	2000-01-01
Access Restriction	Open
Subject Keyword	Communications And Radar Communication Equipment Annealing Additives Progress Microwave Equipment Variability Substrates Oscillators Thin Films Phased Arrays Phase Shift Circuits Ferroelectricity Tunable Filters Sapphire Insertion Loss Proving Permittivity Protective Coatings Aluminum Oxides Figure of Merit Radio Communication 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	Article

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