GLTRS--Glenn
TITLE AND SUBTITLE:
Several Microstrip-Based Conductor/ Thin Film Ferroelectric Phase Shifter Designs Using(YBa2Cu3O7-d, Au)/SrTiO3/LaAlO3 Structures

AUTHOR(S):
F. W. Van Keuls, R. R. Romanofsky, and F. A. Miranda

REPORT DATE:
May 1998

FUNDING NUMBERS:
WU-632-50-5D-00

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-11115

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-1998-206964

SUPPLEMENTARY NOTES:
Prepared for the 10th International Symposium on Integrated Ferroelectrics sponsored by the University of Colorado at Colorado Springs, Monterey, California, March 1-4, 1998. F.W. Van Keuls, National Research Council-NASA Research Associate at Lewis Research Center. R.R. Romanofsky, and F.A. Miranda, NASA Lewis Research Center. Responsible person, F.W. Van Keuls, organization code 5620, (216) 433-3379.

ABSTRACT:
We have designed, fabricated, and tested several novel microstrip-base YBa2Cu3O7-d/SrTiO3/LaAlO3 (YBCO/STO/LAO) and Au/SrTiO3/LaAlO3 (Au/STO/LAO) phase shifters. The first design consists of eight coupled microstrip phase shifters (CMPS) in series. This design using YBCO achieved a relative insertion phase shift (Df) of 484° with a figure of merit of 80°/dB at Vdc= 375 V, 16 GHz, and 40 K. A Df of 290° was observed while maintaining the insertion loss below 4.5 dB. At 77 K, a Df of 420° was obtained for this phase shifter at the same bias and frequency. Both results correspond to an effective coupling length of 0.33 cm. A second compact design, consisting of an Au meander line and a CMPS section was also tested. Of the two samples tested, the best showed a figure of merit of 43°/dB with Df = 290° and 6.8 dB loss, at 40 K, 10 GHz and 400 V. Experimental and modeling results on these circuits will be discussed in the context of potential applications.

SUBJECT TERMS:
Microwave frequencies; Phase shifter; Ferroelectric thin films; Microstrip lines;
Ku-band; HTS thin films

NUMBER OF PAGES:
15

PDF AVAILABLE FROM URL:
1998/TM-1998-206964.pdf
(182,361 KB)
This page contains an Adobe® Acrobat® Reader PDF file. The PDF documents have been created to show thumbnails of each page. If the thumbnails do not display properly, download the file to the hard drive and view through Acrobat® Reader. You can download Acrobat® Reader for free. click

NASA NASA GLTRS--Glenn

A service of the NASA Glenn Research Center Logistics and Technical Information Division

Suggestions or questions about this site can be directed to:

NASA official: Technical Publications Manager, Sue.E.Butts@nasa.gov

Web curator: Caroline.A.Rist@grc.nasa.gov

Privacy Policy and Important Notices