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Chapitre 1 : Etat de l’art des céramiques ferroélectriques et de leurs composites pour applications microondes [21] A. Tagantsev, “Mechanisms of dielectric loss in microwave materials,” Congré Materials Issues for Tunable RF and Microwave Devices, Boston, 1999. [22] A. Tagantsev, V. Sherman, K. Astafiev, J. Venkatesh & N. Setter, “Ferroelectric Materials for Microwave Tunable Applications”, Journal of Electroceramics, 11, 5–66, 2003 [23] S. Triebwasser, “Study of Ferroelectric Transitions of Solid-Solution Single Crystals of KNbO3-KTaO3”, Phys. Rev., 114, 63 (1959). [24] B. Cristopher, C.B. DiAntonio & S.M. Pilgrim, “Processing, Characterization, and Dielectric Studies on K(Ta1−xNbx)O3 for Use at Cryogenic Temperatures”, J. Am. Ceram. Soc., 84, 2547 (2001). [25] P. Debely, P. Gunter & H. Arend, “Preparation and electrooptic properties of hot-pressed potassium niobate-tantalate ceramic”, Am. Ceram. Soc. Bull., 58, 606 (1979). [26] O.G. Vendik & S.P. Zubko, “Ferroelectric phase transition and maximum dielectric permittivity of displacement type ferroelectrics (BaxSr1−xTiO3)”, J. Appl. Phys., 88, 5343 (2000). [27] G.A. Smolenskii & V.A. Isupov, “Segnetoelektricheskie Svoistva Tverdykh Rastvorov Stannata Bariya V Titanate Bariya“, Zhurnal Tekhnicheskoi Fiziki, 24, 1375 (1954). [28] L. C. Sengupta, S.Stowell, E. Ngo, M. E. O'Day & R. Lancto, “Barium strontium titanate and non-ferroelectric oxide ceramic composites for use in phase array antennas,” Integrated Ferroelectrics, vol. 8, pp. 77-88, 1995. [29] E. Ngo, S.Stowell, L. C. Sengupta, M. E. O'Day & R. Lancto, “Fabrication and characterization of barium strontium titanate and non-ferroelectric oxide composites,” Mat. Res. Soc. Symp. Proc., vol. 360, pp. 45-50, 1995. [30] L. C. Sengupta & S. Sengupta, “Novel ferroelectric materials for phased array antennas,” IEEE Transactions on ultrasonics, ferroelectrics, and frequency control, vol. 44, pp. 792-797, 1997. [31] L. C. Sengupta, E. Ngo, M. E. O'Day, S.Stowell & R. Lancto, “Fabrication and characterisation of barium strontium titanate and non-ferroelectric oxide composites for used in phased array antennas and other electronic devices,” IEEE Transactions on ultrasonics, ferroelectrics and frequency control, pp. 622-625, 1994. [32] L. Sengupta, “Ceramic ferroelectric composite material BSTO-magnesium based compound,” US Patent 5.635.434, 1997. [33] L. C. Sengupta, E. Ngo, S. Sengupta & S. Stowell, “Multi-process synthesis of novel ferroelectric oxide ceramic composites for use in phased array antennas,” Proceedings of 20th Army Science Conference, vol. 1:15, pp. 126- 134, 1996. [34] L. C. Sengupta, E. Ngo, S. Stowell, M. O'Day & R. Lancto, “Ceramic ferroelectric composite material BSTO-MGO,” US Patent 5.427.988, 1995. [35] L. C. Sengupta, E. Ngo & J. Synowczynski, “Fabrication and characterization of ferroelectric composite ceramics,” Integrated Ferroelectrics, vol. 15, pp. 181-190, 1997. [36] B. L. J. Rao, D. P. Patel & L. C. Sengupta, “Phased array antennas based on bulk phase shifting with ferroelectrics,” Intergrated Ferroelectrics, vol. 22, pp. 307-316, 1998. 32
Chapitre 1 : Etat de l’art des céramiques ferroélectriques et de leurs composites pour applications microondes [37] R. G.Geyer, Jerzy Krupta, L. Sengupta & S. Sengupta, “Microwave properties of composite ceramic phase shifter materials,” Proceeding of 10th IEEE Intyernational Symposium on Applications of Ferroelectrics, pp. 851-854, 1997. [38] L. C. Sengupta, J. Synowcyznski & L. H. Chiu, “Investigation of the effect of particle size on the optical and electronic properties of Ba1-xSrxTiO3 composite ceramics”, Integrated Ferroelectrics, vol. 17, pp. 287-296, 1997. [39] L. C. Sengupta, E. Ngo, S. Stowell, M. O'Day, G. Gilde & R. Lancto, “Ceramic ferroelectric material”, US Patent 5.312.790, 1994. [40] L. C. Sengupta, E. Ngo, S. Stowell, M. O'Day & R. Lancto, “Ceramic ferroelectric composite material BSTO-ZrO2”, US Patent 5.486.491, 1996. [41] L. C. Sengupta, “Ceramic ferroelectric composite material BSTO-ZnO”, US Patent 5.635.433, 1997. [42] L. C. Sengupta, E. Ngo, S. Stowell, M. O'Day, R. Lancto, S. Sengupta & T. V. Hynes, “Electronically graded mutilayer ferroelectric composites”, US Patent 5.693.429, 1997. [43] S. Sengupta & L. C. Sengupta, “Method of making ferroelectric thin film composites”, US Patent 5.766.697, 1998. [44] S. Sengupta & L. C. Sengupta, “Thin film ferroelectric composite material”, US Patent 5.846.893, 1998. [45] L. C. Sengupta & S. Sengupta, “Ceramic ferrite/ferroelectric composite material”, US Patent 6.063.719, 2000. [46] S. Sengupta, S. Stowell, L. Sengupta, P. C. Joshi, S. Ramanathan & S. B. Desu, “Ferroelectric thin film composites made by metalorganic decomposition”, US Patent 6.071.555, 2000. [47] L. H. Chiu, L. C. Sengupta, S. Stowell, S. Sengupta & J. Synowczynski, “Ceramic ferroelectric composite materials with enhanced electronic properties BSTO-Mg based compound-rare earth oxide”, US Patent 6.074.971, 2000. [48] L. H. Chiu, X. Zhang & L. C. Sengupta, “Electronically tunable ceramic materials include tunable dielectric and metal silicate phases”, US Patent 6.514.895, 2003. [49] L. C. Sengupta, “Electronically tunable dielectric composite thick films and methods of making same”, US Patent 6.737.179, 2004. [50] L. C. Sengupta, X. Zhang & L. H. Chiu, “Electronically tunable, low-loss ceramic materials including a tunable dielectric phase and mulltiple metal oxide phases”, US Patent 6.774.077, 2004. [51] L. H. Chiu , X. Zhang & L. C. Sengupta, “Method for producing low-loss tunable ceramic composites with improved breakdown strengths”, US Patent 7.065.468, 2006. [52] L. H. Chiu , X. Zhang & L. C. Sengupta, “Method for producing low-loss tunable ceramic composites with improved breakdown strengths”, US Patent 7.297.650, 2007. [53] X. Zhang, L. C. Sengupta & E. Underhill “Tunable low loss material composition”, US Patent 7.557.055, 2009. [54] L. C. Sengupta & S. Sengupta, “Breakthrough advances in low loss, tunable dielectric materials,” Mat. Res. Innov., vol. 2, pp. 278-282, 1999. 33
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