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1. 发明授权

US6063719A Ceramic ferrite/ferroelectric composite material 有权
标题翻译：陶瓷铁氧体/铁电复合材料
公开(公告)号：US6063719A
公开(公告)日：2000-05-16
申请号：US144982
申请日：1998-09-01
申请人： Louise C. Sengupta , Somnath Sengupta
发明人： Louise C. Sengupta , Somnath Sengupta
IPC分类号： C04B35/26 , H01F1/03 , C04B35/468 , C04B35/47
CPC分类号： H01F1/0315 , C04B35/2683
摘要： A novel ceramic ferrite/ferroelectric composite material having a low dissipation factor, voltage tunability, and proper impedance matching for the incident medium. The material comprises ferrites doped with the ferroelectric Barium Strontium Titanate (BSTO) or ferrites doped with the ferroelectric Barium Strontium Titanate (BSTO)/MgO. Preferred composites are magnesium ferrites doped with BSTO and magnesium ferrites doped with BSTO/MgO. Most particularly, the inventive composites are comprised of magnesium ferrites doped with Ba.sub.1-x Sr.sub.x TiO.sub.3 and magnesium ferrites doped with Ba.sub.1-x Sr.sub.x TiO.sub.3 /MgO, wherein x is greater than 0.00, but less than or equal to 0.75, and wherein the percent weight ratio of magnesium ferrite to BSTO or BSTO/MgO is 60 to 95 percent ferrite to 40 to 5 percent BSTO or 60 to 95 percent ferrite to 40 to 5 percent BSTO/MgO ferroelectric. A particularly well suited composite, i.e., one having a .mu./.di-elect cons. ratio close to unity, comprises 80 weight percent magnesium ferrite and 20 weight percent BSTO/MgO, wherein said BSTO/MgO comprises 80 weight percent Ba.sub.0.6 Sr.sub.0.4 TiO.sub.3 combined with 20 weight percent MgO.
摘要翻译：一种新颖的陶瓷铁氧体/铁电复合材料，具有低的损耗因子，电压可调性和对入射介质的适当阻抗匹配。该材料包括掺杂有铁电的钛酸钡锶（BSTO）的铁氧体或掺有铁电的锶钡（BSTO）/ MgO的铁氧体。优选的复合材料是掺杂有BSTO的镁铁氧体和掺杂有BSTO / MgO的镁铁氧体。最具体地，本发明的复合材料包括掺杂有Ba1-xSrxTiO3的镁铁氧体和掺杂有Ba1-xSrxTiO3 / MgO的镁铁氧体，其中x大于0.00，但小于或等于0.75，并且其中镁的百分比重量比 BSTO或BSTO / MgO的铁素体为铁素体为60〜95％，BSTO为40〜5％，铁素体为60〜95％，BSTO / MgO铁电体为40〜5％。一种特别适合的复合材料，即一种接近一致的μ/ + 531比率的复合材料，包含80重量％的铁素体和20重量％的BSTO / MgO，其中所述BSTO / MgO包括80重量百分比的Ba0.6Sr0.4TiO3与 20重量％MgO。

2. 发明授权

US07145415B2 Electrically tunable filters with dielectric varactors 有权
标题翻译：带电介质变压器的电可调滤波器
公开(公告)号：US07145415B2
公开(公告)日：2006-12-05
申请号：US10979001
申请日：2004-11-01
申请人： Louise C. Sengupta , Steven C. Stowell , Yongfei Zhu , Somnath Sengupta , Luna H. Chiu , Xubai Zhang
发明人： Louise C. Sengupta , Steven C. Stowell , Yongfei Zhu , Somnath Sengupta , Luna H. Chiu , Xubai Zhang
IPC分类号： H03H7/01
CPC分类号： H01P1/20
摘要： This invention provides a voltage tunable filter comprising an input connection point, an output connection point, and at least one circuit branch electrically coupled to the input connection point and the output connection point and including a voltage tunable dielectric varactor electrically connected to an inductor. The voltage tunable filter can be one of a low-pass, high-pass, band-pass, or band-stop filter. The varactor can include built-in DC blocking capacitors.
摘要翻译：本发明提供了一种电压可调谐滤波器，包括输入连接点，输出连接点和电耦合到输入连接点和输出连接点的至少一个电路支路，并且包括电连接到电感器的电压可调介质变容二极管。电压可调滤波器可以是低通，高通，带通或带阻滤波器之一。变容二极管可以包括内置的直流阻塞电容器。

3. 发明授权

US6074971A Ceramic ferroelectric composite materials with enhanced electronic properties BSTO-Mg based compound-rare earth oxide 有权
标题翻译：具有增强电子性能的陶瓷铁电复合材料BSTO-Mg基复合稀土氧化物
公开(公告)号：US6074971A
公开(公告)日：2000-06-13
申请号：US191546
申请日：1998-11-13
申请人： Luna H. Chiu , Louise C. Sengupta , Steven Stowell , Somnath Sengupta , Jennifer Synowczynski
发明人： Luna H. Chiu , Louise C. Sengupta , Steven Stowell , Somnath Sengupta , Jennifer Synowczynski
IPC分类号： C04B35/053 , C04B35/465 , C04B35/468 , C04B35/47
CPC分类号： C04B35/053 , C04B35/465
摘要： Ceramic ferroelectric composite materials comprising barium strontium titte/magnesium and oxygen-containing compound composite further doped with rare earth (lanthanide) oxides. More particularly, these inventive composites are comprised of Ba.sub.1-x Sr.sub.x TiO.sub.3 /Mg--O based compound/rare earth oxide composite, wherein x is greater than or equal to 0.0 but less than or equal to 1.0, and wherein the weight ratio of BSTO to Mg compound may range from 99.75-20 wt. % BSTO to 0.25-80 wt. % Mg compound, and wherein said rare earth oxide additive comprises less than about 10 mole percent of the composite. The rare earth oxides of the composite include all oxides of the lanthanide series elements including scandium and yttrium, as well as combinations thereof. The magnesium-based compound may be selected from the group consisting of MgO, MgZrO.sub.3, MgZrSrTiO.sub.3, MgTiO.sub.3, and MgCO.sub.3. This new class of composite materials has enhanced electronic properties including: low dielectric constants; substantially decreased electronic loss (low loss tangents); increased tunability; increased temperature stability; decreased sintering temperatures; and low curie temperatures. The electronic properties of these new materials can be tailored for various applications including phased array antenna systems, capacitors, transmission wire, wireless communication, and pyroelectric guidance devices.
摘要翻译：包含钛酸锶钡/镁的陶瓷铁电复合材料和进一步掺杂稀土（镧系元素）氧化物的含氧化合物复合材料。更具体地说，这些本发明的复合材料包括Ba1-xSrxTiO3 / Mg-O基化合物/稀土氧化物复合材料，其中x大于或等于0.0但小于或等于1.0，并且其中BSTO与Mg的重量比化合物可以为99.75-20wt。％BSTO为0.25-80wt。％Mg化合物，并且其中所述稀土氧化物添加剂包含小于约10摩尔％的复合材料。复合材料的稀土氧化物包括镧系元素的所有氧化物，包括钪和钇，以及它们的组合。镁基化合物可以选自MgO，MgZrO3，MgZrSrTiO3，MgTiO3和MgCO3。这种新型复合材料具有增强的电子性能，包括：低介电常数; 电子损失大幅减少（低损耗切线）; 增加可调性; 提高温度稳定性; 降低烧结温度; 和低居里温度。这些新材料的电子特性可以适用于各种应用，包括相控阵天线系统，电容器，传输线，无线通信和热释电引导装置。

4. 发明授权

US5693429A Electronically graded multilayer ferroelectric composites 失效
标题翻译：电子分级多层铁电复合材料
公开(公告)号：US5693429A
公开(公告)日：1997-12-02
申请号：US647260
申请日：1996-05-13
申请人： Louise C. Sengupta , Eric Ngo , Michelina E. O'Day , Steven Stowell , Robert Lancto , Somnath Sengupta , Thomas V. Hynes
发明人： Louise C. Sengupta , Eric Ngo , Michelina E. O'Day , Steven Stowell , Robert Lancto , Somnath Sengupta , Thomas V. Hynes
IPC分类号： B32B18/00 , C04B35/465 , H01Q1/38 , H01Q3/36 , H01Q3/44 , B32B17/00
CPC分类号： C04B35/465 , B32B18/00 , H01Q1/38 , H01Q3/36 , H01Q3/44 , C04B2237/34 , C04B2237/343 , C04B2237/346 , C04B2237/348 , C04B2237/58 , C04B2237/704
摘要： A laminated ceramic ferroelectric material has adjacent layers of Barium ontium Titanate (BSTO)--oxide composite stacked in order of descending oxide content and sized in thickness to produce a generally equal capacitance across each layer, resulting in a material having a graded dielectric constant for use in phased array antenna, for example. The oxides are from the metallic oxide group consisting of alumina, zirconia and magnesia and the layers are produced by tape casting.
摘要翻译：叠层陶瓷铁电体材料具有相邻的层状氧化钡钡（BSTO） - 氧化物复合物，其按照氧化物含量降低的顺序层叠，并且尺寸在厚度上以在每个层上产生大致相等的电容，导致具有梯度介电常数的材料用于使用在相控阵天线中。氧化物来自由氧化铝，氧化锆和氧化镁组成的金属氧化物，并且通过带铸制造层。

5. 发明授权

US06727535B1 Ferroelectric varactor with built-in DC blocks 有权
标题翻译：铁电变容二极管内置直流电阻
公开(公告)号：US06727535B1
公开(公告)日：2004-04-27
申请号：US09434433
申请日：1999-11-04
申请人： Louise C. Sengupta , Steven C. Stowell , Yongfei Zhu , Somnath Sengupta
发明人： Louise C. Sengupta , Steven C. Stowell , Yongfei Zhu , Somnath Sengupta
IPC分类号： H01L2976
CPC分类号： H01L27/016 , H01G7/06 , H01L29/93
摘要： A voltage tunable dielectric varactor includes a tunable ferroelectric layer and first and second non-tunable dielectric layers. First and second electrodes positioned adjacent to the tunable ferroelectric layer form a tunable capacitor. A third electrode is positioned adjacent to the first non-tunable dielectric layer such that the third and first electrodes and the first non-tunable dielectric layer form a first blocking capacitor. A fourth electrode is positioned adjacent to the second non-tunable dielectric layer such that the fourth and second electrodes and the second non-tunable dielectric layer form a second blocking capacitor. The first and second electrodes can be positioned on a surface of the tunable ferroelectric layer opposite the generally planar surface of the substrate, with the first and second electrodes being separated to form a gap. The first and second non-tunable dielectric layers can also be positioned on the generally planar surface of the substrate. The third electrode can be positioned on the surface of the first non-tunable dielectric layer opposite the generally planar surface of the substrate such that the third and first electrodes form a second gap. The fourth electrode can be positioned on the surface of the second non-tunable dielectric layer opposite the generally planar surface of the substrate such that the fourth and second electrodes form a third gap.
摘要翻译：电压可调介质变容二极管包括可调谐铁电层和第一和第二不可调电介质层。位于与可调谐铁电体层相邻的第一和第二电极形成可调电容器。第三电极定位成与第一非可调电介质层相邻，使得第三电极和第一电极和第一非可调电介质层形成第一阻塞电容器。第四电极定位成与第二非可调电介质层相邻，使得第四和第二电极和第二非可调电介质层形成第二阻塞电容器。第一和第二电极可以位于与基板的大致平坦的表面相对的可调谐铁电层的表面上，其中第一和第二电极被分离以形成间隙。第一和第二非可调电介质层也可以位于基底的大致平坦的表面上。第三电极可以位于与基板的大致平坦的表面相对的第一非可调电介质层的表面上，使得第三和第一电极形成第二间隙。第四电极可以位于与基板的大致平坦的表面相对的第二非可调电介质层的表面上，使得第四和第二电极形成第三间隙。

6. 发明申请

US20050088255A1 Electrically tunable filters with dielectric varactors 有权
标题翻译：带电介质变压器的电可调滤波器
公开(公告)号：US20050088255A1
公开(公告)日：2005-04-28
申请号：US10979001
申请日：2004-11-01
申请人： Louise Sengupta , Steven Stowell , Yongfei Zhu , Somnath Sengupta , Luna Chiu , Xubai Zhang
发明人： Louise Sengupta , Steven Stowell , Yongfei Zhu , Somnath Sengupta , Luna Chiu , Xubai Zhang
IPC分类号： H01G7/06 , H01P1/20 , H03H7/01
CPC分类号： H01P1/20
摘要： This invention provides a voltage tunable filter comprising an input connection point, an output connection point, and at least one circuit branch electrically coupled to the input connection point and the output connection point and including a voltage tunable dielectric varactor electrically connected to an inductor. The voltage tunable filter can be one of a low-pass, high-pass, band-pass, or band-stop filter. The varactor can include built-in DC blocking capacitors.
摘要翻译：本发明提供了一种电压可调谐滤波器，包括输入连接点，输出连接点和电耦合到输入连接点和输出连接点的至少一个电路支路，并且包括电连接到电感器的电压可调介质变容二极管。电压可调滤波器可以是低通，高通，带通或带阻滤波器之一。变容二极管可以包括内置的直流阻塞电容器。

7. 发明授权

US5766697A Method of making ferrolectric thin film composites 失效
标题翻译：制备铁电薄膜复合材料的方法
公开(公告)号：US5766697A
公开(公告)日：1998-06-16
申请号：US766704
申请日：1996-11-05
申请人： Somnath Sengupta , Louise Sengupta
发明人： Somnath Sengupta , Louise Sengupta
IPC分类号： C23C14/08 , C23C14/28 , C23C8/00
CPC分类号： C23C14/28 , C23C14/088
摘要： A method of making ferroelectric thin film composites includes the step of roviding a barium strontium titanate material with an additive magnesia-based and forming a thin film ferroelectric composite using pulsed laser deposition. The method forms a thin film composite having enhanced electronic properties.
摘要翻译：一种制备铁电薄膜复合材料的方法包括提供具有添加剂氧化镁的钛酸锶钡材料并使用脉冲激光沉积形成薄膜铁电复合材料的步骤。该方法形成具有增强的电子性质的薄膜复合材料。

8. 发明授权

US5711810A Apparatus for variable optical focusing for processing chambers 失效
标题翻译：用于处理腔室的可变光聚焦装置
公开(公告)号：US5711810A
公开(公告)日：1998-01-27
申请号：US874951
申请日：1996-12-04
申请人： Somnath Sengupta
发明人： Somnath Sengupta
IPC分类号： C23C14/28 , C23C14/00
CPC分类号： C23C14/28
摘要： In a pulsed laser deposition system, the two optical actions of focusing rastering, and the optical chamber window are combined into a single optics system. The single optics system is mounted on the processing chamber. Combining the three separate optical functions into one optics system facilitates laser beam control and reduces the space needed for the apparatus.
摘要翻译：在脉冲激光沉积系统中，聚焦和锐化的两种光学动作以及光学室窗口被组合成单个光学系统。单个光学系统安装在处理室上。将三个单独的光学功能组合成一个光学系统有助于激光束控制并且减少该设备所需的空间。

9. 发明授权

US07046728B1 Method of video coding the movement of a human face from a sequence of images 失效
标题翻译：从图像序列中对人脸的移动进行视频编码的方法
公开(公告)号：US07046728B1
公开(公告)日：2006-05-16
申请号：US09608989
申请日：2000-06-30
申请人： Tinku Acharya , Somnath Sengupta , A. Rama Suryanarayana
发明人： Tinku Acharya , Somnath Sengupta , A. Rama Suryanarayana
IPC分类号： H04N7/18
CPC分类号： G06T9/001
摘要： Briefly, in accordance with one embodiment, a technique for coding the movement of a head or face from a sequence of images is disclosed. A variety of potential alternative embodiments are discussed.
摘要翻译：简而言之，根据一个实施例，公开了一种用于对来自图像序列的头部或面部的移动进行编码的技术。讨论了各种潜在的替代实施例。

10. 发明授权

US06358386B1 Multilayered conformal coatings of tunable, low electronic loss ceramic composites and method of production 失效
标题翻译：可调谐，低电子损耗陶瓷复合材料的多层共形涂层和生产方法
公开(公告)号：US06358386B1
公开(公告)日：2002-03-19
申请号：US09654832
申请日：2000-09-01
申请人： Louise Sengupta , Somnath Sengupta , Eric Ngo
发明人： Louise Sengupta , Somnath Sengupta , Eric Ngo
IPC分类号： C25D1302
CPC分类号： C04B35/6264 , C04B35/4682 , C04B35/63 , C04B35/632 , C04B2235/3206 , C04B2235/3213 , C04B2235/446 , C04B2235/602 , C25D13/02
摘要： A method of producing multilayered conformal coatings of tunable, low electronic loss ceramic composites is carried out by mixing two-phase BSTO/MgO into a base solution of typical lab grade acetone to form a mixed solution, inserting two platinum sheets separated into the mixed solution, applying a constant direct current (DC) bias across the two platinum sheets acting as electrodes, and stirring to reduce sedimentation of particles using a magnetic stirrer. Deposition is also performed on insulating substrates by initially coating them with conducting films of Au, performing BSTO deposition, and subsequently sintering the dielectric film so that the underlying metal film evaporates.
摘要翻译：通过将两相BSTO / MgO混合到典型实验室级丙酮的碱溶液中，形成混合溶液，将两片铂片分离成混合溶液，从而制备可调谐的低电子损失陶瓷复合材料的多层共形涂层的方法在作为电极的两个铂片上施加恒定的直流（DC）偏压，并使用磁力搅拌器搅拌以减少颗粒的沉降。首先用绝缘衬底进行沉积，首先用导电膜Au涂覆它们，进行BSTO沉积，然后烧结电介质膜，使底层金属膜蒸发。

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