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51. 发明申请

US20230046715A1 THERMAL STRUCTURE COUPLING ANAYSIS METHOD OF A SOLID ROCKET MOTOR NOZZLE CONSIDERING THE STRCTURAL GAPS 有权
公开(公告)号：US20230046715A1
公开(公告)日：2023-02-16
申请号：US17400084
申请日：2021-08-11
申请人： Lin Sun , Delei Shi , Yu Zhao , Futing Bao , Chen Cheng , Hao Xu
发明人： Lin Sun , Delei Shi , Yu Zhao , Futing Bao , Chen Cheng , Hao Xu
IPC分类号： G06F30/28 , G06F30/17
摘要： The invention provides a thermal structure coupling analysis method of a solid rocket motor nozzle considering the structural gaps, comprising S1: establish a model of flow field in nozzle and ascertain the cross-sectional area at different positions along the axis, perform quasi-one-dimensional isentropic flow analysis of the nozzle flow field by Newton iteration method; S2: use Bartz formula to ascertain the boundary of the nozzle convective heat transfer coefficient; S3: establish a numerical analysis project of nozzle thermal structure; a two-dimensional axisymmetric model of the nozzle thermal protection structure and a material model thereof; S4: proceed a numerical analysis of the nozzle thermal protection structure heat transfer, including model setting, material setting, contact setting, meshing, solution parameter setting, boundary condition setting, solution and result post-processing; S5: proceed a numerical analysis of the nozzle thermal protection structure thermal stress, including solution parameter setting, boundary condition setting, solution and result post-processing.

52. 发明申请

US20170201347A1 Diversity Combining of Non-Coherently Modulated LDPC Codes in Wireless Communications 审中-公开
公开(公告)号：US20170201347A1
公开(公告)日：2017-07-13
申请号：US14950191
申请日：2015-11-24
申请人： Kapil Borle , Biao Chen , Fangfang Zhu , Yu Zhao
发明人： Kapil Borle , Biao Chen , Fangfang Zhu , Yu Zhao
IPC分类号： H04L1/00 , H04L7/04
CPC分类号： H04L1/0054 , H04B7/08 , H04B7/0885 , H04L1/0045 , H04L1/0057
摘要： A method of decoding a plurality of diverse signals for low-density parity-check (LDPC) decoders that takes advantage of signal diversity. The method allows for the combining of soft-decision LDPC encoded non-coherently modulated signals, which is in contrast to existing approaches where hard decision combining is used for non-coherently modulated signals. The method includes the steps of inputting each diversity signal into a unique demodulator, and calculating the LLR of each demodulated signal. When the diverse demodulated signals are combined into a single combined signal, each bit of the combined signal is selected according to the value of either the highest LLR value of each bit across the demodulated signals or according to the sum of the LLR of each bit across the demodulated signals.

53. 外观设计

USD748603S1 Headset 有权
公开(公告)号：USD748603S1
公开(公告)日：2016-02-02
申请号：US29513272
申请日：2014-12-30
申请人： Pui Tong Kwan , XiangHui Kong , Yu Zhao
设计人： Pui Tong Kwan , XiangHui Kong , Yu Zhao

54. 发明授权

US08847351B2 Integrated power amplifier with load inductor located under IC die 有权
标题翻译：集成功率放大器，负载电感位于IC芯片下方
公开(公告)号：US08847351B2
公开(公告)日：2014-09-30
申请号：US12705493
申请日：2010-02-12
申请人： Guy Klemens , Thomas A Myers , Norman L Frederick, Jr. , Yu Zhao , Babak Nejati , Nathan M Pletcher , Aristotele Hadjichristos
发明人： Guy Klemens , Thomas A Myers , Norman L Frederick, Jr. , Yu Zhao , Babak Nejati , Nathan M Pletcher , Aristotele Hadjichristos
IPC分类号： H01L27/08
CPC分类号： H03F3/195 , H01L23/645 , H01L23/66 , H01L2223/6655 , H01L2223/6661 , H01L2224/16225 , H01L2924/00011 , H01L2924/00014 , H01L2924/1305 , H01L2924/19015 , H01L2924/3011 , H01L2924/00 , H01L2224/0401
摘要： A compact integrated power amplifier is described herein. In an exemplary design, an apparatus includes (i) an integrated circuit (IC) die having at least one transistor for a power amplifier and (ii) an IC package having a load inductor for the power amplifier. The IC die is mounted on the IC package with the transistor(s) located over the load inductor. In an exemplary design, the IC die includes a transistor manifold that is placed over the load inductor on the IC package. The transistor(s) are fabricated in the transistor manifold, have a drain connection in the center of the transistor manifold, and have source connections on two sides of the transistor manifold. The IC die and the IC package may include one or more additional power amplifiers. The transistor(s) for each power amplifier may be located over the load inductor for that power amplifier.
摘要翻译：这里描述了紧凑的集成功率放大器。在示例性设计中，装置包括（i）具有用于功率放大器的至少一个晶体管的集成电路（IC）管芯，以及（ii）具有用于功率放大器的负载电感器的IC封装。 IC芯片安装在IC封装上，晶体管位于负载感应器上方。在示例性设计中，IC管芯包括放置在IC封装上的负载电感器上的晶体管歧管。晶体管制造在晶体管歧管中，在晶体管歧管的中心具有漏极连接，并且在晶体管歧管的两侧具有源极连接。 IC芯片和IC封装可以包括一个或多个附加的功率放大器。每个功率放大器的晶体管可以位于该功率放大器的负载电感上。

55. 发明授权

US08779857B2 Amplifier with variable matching circuit to improve linearity 有权
标题翻译：具有可变匹配电路的放大器，以提高线性度
公开(公告)号：US08779857B2
公开(公告)日：2014-07-15
申请号：US12699659
申请日：2010-02-03
申请人： Nathan M. Pletcher , Yu Zhao
发明人： Nathan M. Pletcher , Yu Zhao
IPC分类号： H03F3/191
CPC分类号： H03F1/565 , H03F1/086 , H03F3/193
摘要： Techniques for reducing distortion and improving linearity of amplifiers are described. In an exemplary design, an apparatus includes a driver amplifier, a variable matching circuit, and a power amplifier. The driver amplifier amplifies a first RF signal and provides a second RF signal. The variable matching circuit receives the second RF signal and provides a third RF signal. The power amplifier amplifies the third RF signal and provides a fourth RF signal. The variable matching circuit matches a fixed impedance at the output of the driver amplifier to a variable impedance at the input of the power amplifier in order to improve the linearity of the amplifiers. In an exemplary design, the power amplifier includes a first transistor (e.g., an NMOS transistor) of a first type, and the variable matching circuit includes a second transistor (e.g., a PMOS transistor) of a second type that is different from the first type.
摘要翻译：描述了减小失真和提高放大器线性度的技术。在示例性设计中，装置包括驱动器放大器，可变匹配电路和功率放大器。驱动器放大器放大第一RF信号并提供第二RF信号。可变匹配电路接收第二RF信号并提供第三RF信号。功率放大器放大第三RF信号并提供第四RF信号。可变匹配电路将驱动放大器输出端的固定阻抗与功率放大器输入端的可变阻抗相匹配，以提高放大器的线性度。在示例性设计中，功率放大器包括第一类型的第一晶体管（例如，NMOS晶体管），并且可变匹配电路包括与第一类型不同的第二类型的第二晶体管（例如，PMOS晶体管）类型。

56. 发明授权

US08750810B2 Power amplifier with switched output matching for multi-mode operation 有权
标题翻译：功率放大器，具有开关输出匹配多模式操作
公开(公告)号：US08750810B2
公开(公告)日：2014-06-10
申请号：US12623248
申请日：2009-11-20
申请人： Nathan Pletcher , Aristotele Hadjichristos , Yu Zhao , Babak Nejati
发明人： Nathan Pletcher , Aristotele Hadjichristos , Yu Zhao , Babak Nejati
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H04B1/0458 , H03F1/56 , H03F3/245 , H04B1/406
摘要： Exemplary embodiments are directed to a transmitter with a power amplifier and a switched output matching circuit implementing a plurality of output paths for a plurality of operating modes is described. The power amplifier receives an input RF signal and provides an amplified RF signal. An output matching network performs impedance transformation from low impedance at the power amplifier output to higher impedance at the matching network output. The plurality of output paths are coupled to the output matching network. Each output path provides a different target output impedance for the power amplifier and routes the amplified RF signal from the power amplifier to an antenna when that output path is selected. Each output path may include a matching network coupled in series with a switch. The matching network provides the target output impedance for the power amplifier when the output path is selected. The switch couples or decouples the output path to/from the power amplifier.
摘要翻译：示例性实施例涉及具有功率放大器和实现用于多个操作模式的多个输出路径的切换输出匹配电路的发射机。功率放大器接收输入RF信号并提供放大的RF信号。输出匹配网络执行从功率放大器输出端的低阻抗到匹配网络输出端的较高阻抗的阻抗变换。多个输出路径耦合到输出匹配网络。当选择该输出路径时，每个输出路径为功率放大器提供不同的目标输出阻抗，并将放大的RF信号从功率放大器路由到天线。每个输出路径可以包括与开关串联耦合的匹配网络。当选择输出路径时，匹配网络为功率放大器提供目标输出阻抗。开关将输出路径耦合到/从功率放大器解耦。

57. 发明申请

US20130300492A1 SWITCHING POWER CAPABLE OF AVOIDING COUPLING EFFECTS 审中-公开
标题翻译：切换电源避免耦合效应
公开(公告)号：US20130300492A1
公开(公告)日：2013-11-14
申请号：US13570167
申请日：2012-08-08
申请人： Yu Zhao , Xiang Sun , Fei Wang , Dong Chen
发明人： Yu Zhao , Xiang Sun , Fei Wang , Dong Chen
IPC分类号： H03K17/687 , H05K13/00
CPC分类号： H03K17/122 , H01L2924/0002 , H03K2217/0018 , H03K2217/0036 , Y10T29/49117 , H01L2924/00
摘要： A switching power capable of avoiding coupling effects is provided. The switching power comprises a driving loop. The driving loop comprises the substrate end and the gate end of a power Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) and a controlling gate, and the controlling gate is connected to the gate end of the power MOSFET and the substrate end of the power MOSFET is connected to the controlling gate. The switching power provided by the present can avoid the coupling effect of the driving loop and the power stage loop at the common source pin, thereby reducing the switching power losses and improving the efficiency of the switching power.
摘要翻译：提供了能够避免耦合效应的开关电源。开关电源包括驱动回路。驱动回路包括功率金属氧化物半导体场效应晶体管（MOSFET）和控制栅极的基极端和栅极端，并且控制栅极连接到功率MOSFET的栅极端，并且基极端功率MOSFET连接到控制栅极。本发明提供的开关电源可以避免在公共源极引脚上的驱动环路和功率级环路的耦合效应，从而降低开关功率损耗，提高开关电源的效率。

58. 发明申请

US20130190036A1 MULTI-MODE BYPASS DRIVER AMPLIFIER WITH TUNABLE LOAD MATCHING 有权
标题翻译：多模式旁路驱动放大器，具有可调载荷匹配
公开(公告)号：US20130190036A1
公开(公告)日：2013-07-25
申请号：US13356492
申请日：2012-01-23
申请人： Yu Zhao , Nathan M. Pletcher
发明人： Yu Zhao , Nathan M. Pletcher
IPC分类号： H04W88/02
CPC分类号： H03F1/0277 , H03F1/565 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/213 , H03F2200/222 , H03F2200/318 , H03F2200/378 , H03F2200/387 , H03F2200/411 , H03F2203/21136 , H03F2203/21175 , H03F2203/7233 , H03F2203/7239
摘要： A multi-mode driver amplifier with tunable load matching is disclosed. In an exemplary design, an apparatus includes a multi-mode driver amplifier and a tunable impedance matching circuit. The driver amplifier amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The tunable impedance matching circuit matches an output impedance of the driver amplifier. The apparatus may include a main transmit path and a bypass transmit path. The bypass transmit path may include the driver amplifier and the tunable impedance matching circuit and no power amplifier. The main transmit path may include a second driver amplifier and a power amplifier. The main transmit path may be selected for transmit power levels higher than a threshold level, and the bypass transmit path may be selected for transmit power levels lower than the threshold level.
摘要翻译：公开了一种具有可调负载匹配的多模驱动放大器。在示例性设计中，装置包括多模式驱动器放大器和可调谐阻抗匹配电路。驱动器放大器放大输入射频（RF）信号并提供放大的RF信号。可调阻抗匹配电路匹配驱动器放大器的输出阻抗。该装置可以包括主发射路径和旁路发射路径。旁路发射路径可以包括驱动放大器和可调谐阻抗匹配电路，而不包括功率放大器。主发射路径可以包括第二驱动放大器和功率放大器。可以为高于阈值电平的发射功率电平选择主发射路径，并且可以选择低于阈值电平的发射功率电平的旁路发射路径。

59. 外观设计

USD666312S1 Lower transom of curtain wall 有权
标题翻译：幕墙下艉板
公开(公告)号：USD666312S1
公开(公告)日：2012-08-28
申请号：US29408751
申请日：2011-12-16
申请人： Yu Zhao
设计人： Yu Zhao

60. 外观设计

USD666310S1 Assisting mullion for curtain wall connection 有权
标题翻译：协助竖框连接
公开(公告)号：USD666310S1
公开(公告)日：2012-08-28
申请号：US29408749
申请日：2011-12-16
申请人： Yu Zhao
设计人： Yu Zhao

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