NASA Technical Reports Server (NTRS) : Life pdf

NASA Technical Reports Server (NTRS) : Life

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Thin film ferroelectrics are being studied as candidates for novel tunable microwave components such as tunable filters, tunable oscillators, and phase shifters for applications in phased array antennas. Much work has been done optimizing the ferroelectric material and in producing proof-of-concepts of these components. However, little attention has been given to their reliability. In this study we present our results on the reliability of high quality K-band phase shifters made of Ba(sub x)Sr(sub 1-x)TiO3 (BSTO) ferroelectric thin films (0.5 to 0.75 micrometers thick) on MgO and LAO. The phase shift and insertion loss were measured at 300 K over 104 operation cycles within a 0 to 400 V dc bias range (0 to 40 V/micrometer) at 15, 18, and 22 GHz. Results for these phase shifters indicate that in general there were no appreciable changes in phase shift after 4×10(exp 4) cycles, suggesting that these phase shifters are robust enough to sustain optimal performance under the operating mode typical of fast tracking phased arrays

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 9/1/2000
• Year: 2000
• Book Topics/Themes: NASA Technical Reports Server (NTRS), FERROELECTRICITY, MICROWAVE EQUIPMENT, THIN FILMS, TUNING, RELIABILITY, FERROELECTRIC MATERIALS, MAGNESIUM OXIDES, PHASED ARRAYS, PHASE SHIFT, Miranda, Felix A., VanKeuls, Fred W., Romanofsky, Robert R., Mueller, Carl H., Warner, Joseph D

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