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1.发明申请公开(公告)号：US20050280589A1
公开(公告)日：2005-12-22
申请号：US11154428
申请日：2005-06-16
申请人： Bing Chiang , Michael Lynch , Douglas Wood , Thomas Liu , Govind Kadambi , Mark Kishler
发明人： Bing Chiang , Michael Lynch , Douglas Wood , Thomas Liu , Govind Kadambi , Mark Kishler
摘要： A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.
摘要翻译： 薄型智能天线包括由电介质基板承载的有源天线元件，有源天线元件具有T形形状。 无源天线元件由电介质基板承载，并且它们具有横向邻近有源天线元件的倒L形部分。 阻抗元件可选择性地连接到用于天线波束转向的无源天线元件。
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2.发明申请公开(公告)号：US20060044205A1
公开(公告)日：2006-03-02
申请号：US11201789
申请日：2005-08-11
申请人： Michael Lynch , Thomas Liu , Bing Chiang , Govind Kadambi
发明人： Michael Lynch , Thomas Liu , Bing Chiang , Govind Kadambi
IPC分类号： H01Q19/00
CPC分类号： H01Q3/44 , H01Q1/243 , H01Q9/40 , H01Q9/42 , H01Q19/005
摘要： A smart antenna includes an active antenna element, a passive antenna element laterally adjacent the active antenna element, and an impedance element selectively connectable to the passive antenna element for antenna beam steering. A ground plane includes a center portion adjacent the active antenna element, and first and second arms extending outwardly from the center portion. The first arm is connected to the impedance element, and the second arm is laterally adjacent the first arm.
摘要翻译： 智能天线包括有源天线元件，与有源天线元件横向相邻的无源天线元件，以及可选择地连接到无源天线元件用于天线波束转向的阻抗元件。 接地平面包括邻近有源天线元件的中心部分，以及从中心部分向外延伸的第一和第二臂。 第一臂连接到阻抗元件，第二臂横向邻近第一臂。
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公开(公告)号：US09084554B2
公开(公告)日：2015-07-21
申请号：US12728170
申请日：2010-03-19
申请人： Youngkyoo Jung , Eric C. Wong , Thomas Liu
发明人： Youngkyoo Jung , Eric C. Wong , Thomas Liu
IPC分类号： A61B5/055 , A61B5/02 , G01R33/563 , G01R33/483
CPC分类号： A61B5/055 , A61B5/02028 , G01R33/4833 , G01R33/56366
摘要： Techniques, systems and apparatus are described for magnetic resonance imaging. A magnetic resonance imaging (MRI) system comprises a scanner comprising a magnet, gradient coils and a radio frequency (RF) system to perform various operations. The scanner can apply a gradient field and a train of RF pulses comprising more than two phases to tag a target blood vessel, and acquire magnetic resonance signals based on the applied train of RF pulses to sample the more than two phases. The MRI system includes a data processing system in communication with the scanner to receive the acquired magnetic resonance signals and process the received magnetic resonance signal to generate images proportional to perfusion.
摘要翻译： 描述了用于磁共振成像的技术，系统和装置。 磁共振成像（MRI）系统包括扫描器，其包括磁体，梯度线圈和用于执行各种操作的射频（RF）系统。 扫描仪可以应用梯度场和包括多于两个相的RF脉冲序列来标记目标血管，并且基于所施加的RF脉冲序列获取磁共振信号以对两个以上的相进行采样。 MRI系统包括与扫描仪通信的数据处理系统，以接收所获取的磁共振信号并处理接收到的磁共振信号以产生与灌注成比例的图像。
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4.发明授权公开(公告)号：US07403160B2
公开(公告)日：2008-07-22
申请号：US11154428
申请日：2005-06-16
申请人： Bing A. Chiang , Michael J. Lynch , Douglas H. Wood , Thomas Liu , Govind R. Kadambi , Mark W. Kishler
发明人： Bing A. Chiang , Michael J. Lynch , Douglas H. Wood , Thomas Liu , Govind R. Kadambi , Mark W. Kishler
摘要： A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.
摘要翻译： 薄型智能天线包括由电介质基板承载的有源天线元件，有源天线元件具有T形形状。 无源天线元件由电介质基板承载，并且它们具有横向邻近有源天线元件的倒L形部分。 阻抗元件可选择性地连接到用于天线波束转向的无源天线元件。
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公开(公告)号：US09118109B2
公开(公告)日：2015-08-25
申请号：US12971444
申请日：2010-12-17
申请人： Sung-Hoon Oh , Thomas Liu , Thorsten Hertel
发明人： Sung-Hoon Oh , Thomas Liu , Thorsten Hertel
摘要： Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes a grounded parasitic element. In some embodiments, a high band arm is provided, and is fed off-center, so that the resonating arms are not symmetrical in length. In some embodiments, a coupled ground resonator is included to add a differential resonating mode. A ground leg may be included to offer facilitate impedance and inductance matching. The combination of these structures creates four distinct resonance modes for the high band, which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.
摘要翻译： 描述用于移动设备的天线结构的各种实施例。 在一个或多个实施例中，多频带天线包括接地寄生元件。 在一些实施例中，提供高带臂，并且偏心地进给，使得谐振臂的长度不对称。 在一些实施例中，包括耦合的接地谐振器以添加差分谐振模式。 可以包括地脚以提供阻抗和电感匹配。 这些结构的组合为高频带产生了四种不同的谐振模式，这为所公开的天线带来了广泛的有效带宽。 描述和要求保护其他实施例。
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公开(公告)号：US07587233B2
公开(公告)日：2009-09-08
申请号：US10514084
申请日：2003-05-13
申请人： Eric C. Wong , Thomas Liu
发明人： Eric C. Wong , Thomas Liu
IPC分类号： A61B5/05
CPC分类号： G01R33/56366 , G01R33/56341
摘要： Techniques for providing velocity-selective magnetic arterial spin labeling in magnetic resonance imaging (MRI) without spatial selectivity. In one implementation, an RF pulse train is applied to selectively tag spins according to velocities of the spins without selection based on locations of the spins. MRI images of tagged spins at an area of interest are then acquired to obtain information on perfusion at the area of interest.
摘要翻译： 在没有空间选择性的磁共振成像（MRI）中提供速度选择性磁动脉自旋标记的技术。 在一个实现中，应用RF脉冲序列以根据自旋的速度来选择性地标记自旋，而不是根据自旋的位置进行选择。 然后获取在感兴趣区域的标记自旋的MRI图像，以获得关于感兴趣区域的灌注的信息。
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7.发明授权公开(公告)号：US07180465B2
公开(公告)日：2007-02-20
申请号：US11201789
申请日：2005-08-11
CPC分类号： H01Q3/44 , H01Q1/243 , H01Q9/40 , H01Q9/42 , H01Q19/005
摘要： A smart antenna includes an active antenna element, a passive antenna element laterally adjacent the active antenna element, and an impedance element selectively connectable to the passive antenna element for antenna beam steering. A ground plane includes a center portion adjacent the active antenna element, and first and second arms extending outwardly from the center portion. The first arm is connected to the impedance element, and the second arm is laterally adjacent the first arm.
摘要翻译： 智能天线包括有源天线元件，与有源天线元件横向相邻的无源天线元件，以及可选择地连接到无源天线元件用于天线波束转向的阻抗元件。 接地平面包括邻近有源天线元件的中心部分，以及从中心部分向外延伸的第一和第二臂。 第一臂连接到阻抗元件，第二臂横向邻近第一臂。
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公开(公告)号：US06363033B1
公开(公告)日：2002-03-26
申请号：US09649813
申请日：2000-08-28
申请人： Christopher R. Cole , Albert Gee , Thomas Liu
发明人： Christopher R. Cole , Albert Gee , Thomas Liu
IPC分类号： G03B4206
CPC分类号： G10K11/345 , G01S7/52017 , G01S7/52026 , G01S7/52028 , G01S7/52046 , G01S7/52049 , G01S7/52066 , G01S7/5209 , G01S7/52095 , G01S15/8915 , G01S15/8979 , G01S15/8988 , G10K11/341
摘要： A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values, For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels. Waveform parameters can be specified to the transmitters by an external central control system which is responsible for higher level flexibility, such as scan formats, focusing depths and fields of view. The transmit pulse delay specified per-channel to each transmitter is applied in at least two components: a focusing time delay component and a focusing phase component. The carrier frequency can be specified for each transmit beam, to any desired frequency within a substantially continuous predefined range of frequencies, and a beam-interleaved signal processing path permits operation in any of several predefined processing modes, which define different parameter sets in a trade-off among (1) the number of beams produced; (2) per-beam initial waveform sample interval; and (3) transmit frequency.
摘要翻译： 具有多波束传输能力的数字发射波束形成器系统具有多个多信道发射机，每个信道具有采样的复值初始波形信息源，其代表要应用于一个或多个相应的换能器元件的最终期望波形， 每个梁。 每个多通道发射机以数字方式对每个通道的相应初始波形信息应用波束形成延迟和变迹，以载波频率对信息进行数字调制，并将该信息内插到DAC采样率以转换为模拟信号并应用于相关联的换能器元件 （s）。 波束形成器发射器可以每个通道和每个波束编程，具有载波频率，延迟，变迹和校准值。对于脉冲波操作，可以在每次触发的基础上向波束形成器发射机指定脉搏波形参数，而不会将扫描帧速率降至 非有用的诊断水平。 可以通过负责更高级别灵活性的外部中央控制系统向发射机指定波形参数，如扫描格式，聚焦深度和视场。 至少两个组件：每个通道指定给每个发射机的发射脉冲延迟：聚焦时间延迟分量和聚焦相位分量。 可以将载波频率指定为每个发射波束到基本上连续的预定频率范围内的任何期望的频率，并且波束交织的信号处理路径允许在若干预定义的处理模式中的任何一种中进行操作，这些模式在交易中定义不同的参数集 （1）产生的梁数; （2）每波束初始波形采样间隔; 和（3）发射频率。
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公开(公告)号：US5995450A
公开(公告)日：1999-11-30
申请号：US67269
申请日：1998-04-27
申请人： Christopher R. Cole , Albert Gee , Thomas Liu
发明人： Christopher R. Cole , Albert Gee , Thomas Liu
CPC分类号： G01S15/8988 , G01S15/8915 , G01S15/8979 , G01S7/52019 , G01S7/52026 , G01S7/52046 , G01S7/52066 , G01S7/5209 , G01S7/52095 , G10K11/341 , G10K11/345 , G01S7/52049
摘要： A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels. Waveform parameters can be specified to the transmitters by an external central control system which is responsible for higher level flexibility, such as scan formats, focusing depths and fields of view. The transmit pulse delay specified per-channel to each transmitter is applied in at least two components: a focusing time delay component and a focusing phase component. The carrier frequency can be specified for each transmit beam, to any desired frequency within a substantially continuous predefined range of frequencies, and a beam-interleaved signal processing path permits operation in any of several predefined processing modes, which define different parameter sets in a trade-off among (1) the number of beams produced; (2) per-beam initial waveform sample interval; and (3) transmit frequency.
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公开(公告)号：US20120169568A1
公开(公告)日：2012-07-05
申请号：US12983695
申请日：2011-01-03
申请人： Sung-Hoon Oh , Thomas Liu , Thorsten Hertel
发明人： Sung-Hoon Oh , Thomas Liu , Thorsten Hertel
IPC分类号： H01Q21/30
摘要： Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes first, second and third resonating elements. The first and second resonating elements may each have an L-shape, and may be fed by a single feed leg. The third resonating element may be coupled to ground. In some embodiments, the first resonating element may be longer than the second resonating element, and the third resonating element may be positioned adjacent to the first resonating element. In other embodiments, a tuning element is coupled to the signal feed and is positioned adjacent to the second resonating element. The tuning element may have a geometry that is similar to a geometry of the second resonating element. The combination of these structures creates a plurality of distinct resonance modes which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.
摘要翻译： 描述用于移动设备的天线结构的各种实施例。 在一个或多个实施例中，多频带天线包括第一，第二和第三谐振元件。 第一和第二谐振元件可以各自具有L形，并且可以由单个进给支脚供给。 第三谐振元件可以耦合到地。 在一些实施例中，第一谐振元件可以比第二谐振元件长，并且第三谐振元件可以被定位成与第一谐振元件相邻。 在其他实施例中，调谐元件耦合到信号馈送并且被定位成与第二谐振元件相邻。 调谐元件可以具有类似于第二谐振元件的几何形状的几何形状。 这些结构的组合产生了多个不同的谐振模式，其为所公开的天线增加了宽的有效带宽。 描述和要求保护其他实施例。
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