Low- and high-temperature superconducting microwave filters

Talisa, S.H.; Janocko, M. A.; Moskowitz, C.; Talvacchio, J.; Billing, Johan; Brown, R.; Buck, David; Jones, C. K.; McAvoy, B.R.; Wagner, G. R.; Watt, D. H.

doi:10.1109/22.83816

Cited by 82 publications

(16 citation statements)

References 11 publications

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“…Oxide materials of general composition ABCO 4 (where A ¼ Ca, Sr, Ba, B ¼ La, Nd, Pr and C ¼ Al, Ga) with the tetragonal perovskite-related K 2 NiF 4 -type structure are considered promising substrate materials for high-temperature superconducting (HTSc) thin films, elements of thermal radiation receivers and other electronic devices due to their electrochemical and thermal properties and good lattice matching [1][2][3][4][5][6][7][8]. Crystals of high structural quality are required for such applications so the characterisation of crystal lattice defects is of great importance.…”

Section: Introductionmentioning

confidence: 99%

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

Malinowska¹,

Lefeld‐Sosnowska²,

Wieteska³

et al. 2008

Journal of Crystal Growth

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a b s t r a c tA Ca 0.5 Sr 0.5 NdAlO 4 single crystal grown by the Czochralski method in the [1 0 0] direction was investigated by means of conventional projection X-ray topography, and by means of synchrotron white beam and monochromatic beam topography.The topographic investigation revealed growth striations with strong black diffraction contrasts distributed periodically in the form of concentric rings, and a significant number of resolved defects. Some of these defects seem to be associated with precipitates, while others form linear diffraction contrasts located perpendicularly to the striation stripes. The last category of defects can be somehow associated with dislocations, but provides much more intense and complex diffraction contrast that can be expected for individual dislocations.A significant lattice deformation associated with striation was revealed with some of the synchrotron topographic methods, particularly back-reflection white beam topography with fine mesh placed behind the crystal and transmission synchrotron section topography, where a characteristic bending of the section image was observed. The transmission section topographs provided also good visibility of segregation fringes in the plane intersected by the beam, corresponding to the subsequent positions of the growth surface.

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Section: Introductionmentioning

confidence: 99%

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

Malinowska¹,

Lefeld‐Sosnowska²,

Wieteska³

et al. 2008

Journal of Crystal Growth

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“…high-Q resonators, low-loss delay lines, various filters, and small antennas. More recently, several groups in the USA, [40,411 …”

Section: Applications Of High-t Thin Filmsmentioning

confidence: 99%

High‐T_c superconducting thin films

et al. 1993

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This review describes recent advances in thin film studies of high-T, superconducting cuprates. Emphasis is placed on epitaxial thin film growth technologies for LnBa,Cu,O, (Ln = Y, Eu) cuprates, and on microwave device applications. An exciting area of this research involves epitaxial multilayer structures, such as a superconductor/insulator/superconductor (SIS) combination, and so preliminary results on SIS fabrication are also described.

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“…HTS filters with high selectivity have been developed and used in mobile communications [1][2][3][4]. Low insertion loss and high out of band rejection are the prominent character of HTS filters.…”

Section: Introductionmentioning

confidence: 99%

Mechanism study of mechanical tuning in HTS filter application

Peng

Zhang

Guo

et al. 2007

Micro & Optical Tech Letters

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Mechanical tuning method using sapphire and copper rods for high temperature superconducting filters is presented. A three‐pole microstrip filter and a two‐pole patch filter were fabricated and tuned. Results show that the center frequency shifts toward lower end in dielectric tuning and toward either lower end or higher end in metallic tuning depending on the local electromagnetic field distribution.© 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1565–1568, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22561

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Low- and high-temperature superconducting microwave filters

Cited by 82 publications

References 11 publications

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

High‐T_c superconducting thin films

Mechanism study of mechanical tuning in HTS filter application

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Low- and high-temperature superconducting microwave filters

Cited by 82 publications

References 11 publications

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

High‐Tc superconducting thin films

Mechanism study of mechanical tuning in HTS filter application

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Product

Resources

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High‐T_c superconducting thin films