(YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}},Au)/SrTiO{sub 3}/LaAlO{sub 3} thin film conductor/ferroelectric coupled microstripline phase shifters for phased array applications
- National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135 (United States)
- SCT, Golden, Colorado 80401 (United States)
We report on the design, fabrication, and testing of novel YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}/SrTiO{sub 3}/LaAlO{sub 3} (YBCO/STO/LAO) and Au/SrTiO{sub 3}/LaAlO{sub 3} (Au/STO/LAO) coupled microstrip line phase shifters (CMPS). These CMPS were tested at frequencies within the Ku and K bands (12{endash}20 GHz), at temperatures from 24 to 77 K, and at dc voltages (V{sub dc}) from zero to 350 V. A relative insertion phase shift ({Delta}{phi}) of 390{degree} was measured for an eight-element YBCO/STO/LAO CMPS at V{sub dc}=350V, 16 GHz, and 40 K. At 77 K, a {Delta}{phi}{approximately}260{degree} was obtained for the CMPS at the same bias and frequency. Both results correspond to an effective coupling length of 0.33 cm. At both temperatures, the phase shifter exhibits a figure of merit of {approximately}30{degree}/dB. To our knowledge, these are the best results published so far at these frequencies where miniaturization, insertion loss, and phase delay are key considerations. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 552935
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 71; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
66 PHYSICS
BARIUM COMPOUNDS
BARIUM OXIDES
COPPER OXIDES
FERROELECTRIC MATERIALS
GHZ RANGE 01-100
GOLD
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MICROWAVE POWER TRANSMISSION
PHASE SHIFT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
TITANIUM OXIDES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES