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    • 3. 发明申请
    • ULTRA-WIDEBAND VARIABLE-PHASE RING-OSCILLATOR ARRAYS, ARCHITECTURES, AND RELATED METHODS
    • 超宽带可变振荡器振荡器阵列,结构和相关方法
    • US20080297414A1
    • 2008-12-04
    • US12131805
    • 2008-06-02
    • Harish KrishnaswamyHossein Hashemi
    • Harish KrishnaswamyHossein Hashemi
    • H01Q3/00H03L7/00
    • H01Q3/28H01Q3/36H03L7/087H03L7/0891H03L7/0995
    • Variable phase ring oscillators are described that provide a linear phase progression between adjacent elements in an antenna array by providing a symmetric ring configuration of tuned amplifiers and a single phase shifter. The ring topology is coupled to a single PLL that allows for direct modulation and demodulation of arbitrary waveforms without using RF up/down converting mixers. The PLL distributes the transmit waveforms to all antenna elements in the transmit mode and combines the received waveforms in the receive mode without any complicated power distribution network. Ultra-wideband architectures and methods are described that utilize a first reference signal source, a VPRO, and a second reference signal source. Related methods are controlling an array and beam steering are also described.
    • 描述了可变相位振荡器,其通过提供调谐放大器和单个移相器的对称环配置来在天线阵列中的相邻元件之间提供线性相位进程。 环形拓扑耦合到单个PLL,允许直接调制和解调任意波形,而无需使用RF上/下转换混频器。 PLL将发射波形分配给发射模式下的所有天线元件,并将接收的波形组合在接收模式中,无需任何复杂的配电网络。 描述了利用第一参考信号源,VPRO和第二参考信号源的超宽带架构和方法。 还描述了相关方法控制阵列和波束转向。
    • 4. 发明授权
    • Ultra-wideband variable-phase ring-oscillator arrays, architectures, and related methods
    • 超宽带可变相位振荡器阵列,架构和相关方法
    • US07848719B2
    • 2010-12-07
    • US12131805
    • 2008-06-02
    • Harish KrishnaswamyHossein Hashemi
    • Harish KrishnaswamyHossein Hashemi
    • H03J7/32
    • H01Q3/28H01Q3/36H03L7/087H03L7/0891H03L7/0995
    • Variable phase ring oscillators are described that provide a linear phase progression between adjacent elements in an antenna array by providing a symmetric ring configuration of tuned amplifiers and a single phase shifter. The ring topology is coupled to a single PLL that allows for direct modulation and demodulation of arbitrary waveforms without using RF up/down converting mixers. The PLL distributes the transmit waveforms to all antenna elements in the transmit mode and combines the received waveforms in the receive mode without any complicated power distribution network. Ultra-wideband architectures and methods are described that utilize a first reference signal source, a VPRO, and a second reference signal source. Related methods are controlling an array and beam steering are also described.
    • 描述了可变相位振荡器,其通过提供调谐放大器和单个移相器的对称环配置来在天线阵列中的相邻元件之间提供线性相位进程。 环形拓扑耦合到单个PLL,允许直接调制和解调任意波形,而无需使用RF上/下转换混频器。 PLL将发射波形分配给发射模式下的所有天线元件,并将接收的波形组合在接收模式中,无需任何复杂的配电网络。 描述了利用第一参考信号源,VPRO和第二参考信号源的超宽带架构和方法。 还描述了相关方法控制阵列和波束转向。
    • 7. 发明授权
    • Automatic isolation in loops
    • 环路自动隔离
    • US06188668B1
    • 2001-02-13
    • US09071678
    • 1998-05-01
    • David BrewerKarl M. HensonHossein HashemiDavid Baldwin
    • David BrewerKarl M. HensonHossein HashemiDavid Baldwin
    • G01R3108
    • H04L12/437H04B10/038
    • A loop network hub port with an automatic bypass feature. The automatic bypass feature causes the hub port to enter a bypass mode upon detection of a specified loop failure initialization sequence from a node port attached to the hub port. The hub port does not propagate loop failure initialization data generated by the attached node port upon the failure of a data channel from the hub port to the node port. The hub port replaces loop failure initialization data received from the node port with buffer data and conceals the node port failure from the remainder of the loop. Upon detection of the loop failure initialization sequence received from the attached node port, the hub port enters a bypass mode and maintains that bypass mode until a recovery sequence is received from the node port. At that point, the hub port reinserts the node port into the loop.
    • 具有自动旁路功能的环路网络集线器端口。 在从连接到集线器端口的节点端口检测到指定的环路故障初始化序列时,自动旁路功能使集线器端口进入旁路模式。 在从集线器端口到节点端口的数据通道发生故障时,集线器端口不会传播由附加节点端口生成的环路故障初始化数据。 集线器端口用缓冲区数据替换从节点端口接收到的环路故障初始化数据,并从循环的其余部分中隐藏节点端口故障。 在检测到从连接的节点端口接收到的环路故障初始化序列时,集线器端口进入旁路模式,并维护旁路模式,直到从节点端口接收到恢复序列。 此时,集线器端口将节点端口重新插入到循环中。
    • 9. 发明申请
    • HYBRID-BASED CANCELLATION IN PRESENCE OF ANTENNA MISMATCH
    • 天线故障存在的基于混合的消除
    • US20150236842A1
    • 2015-08-20
    • US14624289
    • 2015-02-17
    • Ankush GoelBehnam AnaluiHossein Hashemi
    • Ankush GoelBehnam AnaluiHossein Hashemi
    • H04L5/14H04B1/525
    • H04L5/1461H03H7/463H04B1/525H04B1/58
    • A multi-port hybrid-based cancellation network may include a first and second hybrid coupler, and a first and second two-port network. The second hybrid coupler may be distinct from the first hybrid coupler. The first two-port network may include a first filter connected between the first and the second hybrid couplers. The second two-port network may include a second filter that is distinct from but essentially the same as the first filter connected between the first and the second hybrid couplers. Other circuitry components may be connected to one of the ports of multi-port hybrid-based cancellation network. These other circuitry components may have a configuration that increases or maximizes signal isolation between at least two of the ports of the multi-port hybrid-based cancellation network.
    • 多端口混合型取消网络可以包括第一和第二混合耦合器以及第一和第二双端口网络。 第二混合耦合器可以不同于第一混合耦合器。 第一双端口网络可以包括连接在第一和第二混合耦合器之间的第一滤波器。 第二双端口网络可以包括与连接在第一和第二混合耦合器之间的第一滤波器不同但基本上相同的第二滤波器。 其他电路组件可以连接到基于多端口混合型取消网络的端口之一。 这些其它电路组件可以具有增加或最大化基于多端口混合型取消网络的至少两个端口之间的信号隔离的配置。
    • 10. 发明申请
    • Enhancing Isolation and Impedance Matching in Hybrid-Based Cancellation Networks and Duplexers
    • 在基于混合的取消网络和双工器中增强隔离和阻抗匹配
    • US20150163044A1
    • 2015-06-11
    • US14565752
    • 2014-12-10
    • Behnam AnaluiAnkush GoelHossein Hashemi
    • Behnam AnaluiAnkush GoelHossein Hashemi
    • H04L5/14H04J1/02
    • H04L5/1461H03F1/56H03F3/195H03F3/24H03F2200/192H03F2200/198H03F2200/204H03F2200/222H03F2200/387H04B1/525
    • Multi-port hybrid-based cancellation networks may be used to enable simultaneous transmit and receive in one or more co-existent communication systems. A multi-port hybrid-based cancellation network may include a first and second quadrature hybrid, a first and second two-port network, and other circuitry components. The second quadrature hybrid may be distinct from the first quadrature hybrid. The first two-port network may include a first filter or a first amplifier connected between the first and the second quadrature hybrids. The second two-port network may include a second filter or a second amplifier that is distinct from but essentially the same as the first filter or the first amplifier connected between the first and the second quadrature hybrids. The other circuitry components may be connected between or connected to a connection between one of the quadrature hybrids and one of the two-port networks. These other circuitry components may have a configuration that minimizes signal return loss at least one of the ports of the multi-port hybrid-based cancellation network. They may in addition or instead have a configuration that maximizes signal isolation between at least two of the ports of the multi-port hybrid-based cancellation network.
    • 可以使用基于多端口混合的消除网络来实现在一个或多个共存的通信系统中的同时发送和接收。 多端口混合型取消网络可以包括第一和第二正交混合,第一和第二双端口网络以及其他电路组件。 第二正交混合可以不同于第一正交混合。 第一双端口网络可以包括连接在第一和第二正交混合器之间的第一滤波器或第一放大器。 第二双端口网络可以包括与连接在第一和第二正交混合器之间的第一滤波器或第一放大器不同但基本上相同的第二滤波器或第二放大器。 其他电路组件可以连接在正交混合器中的一个和两端口网络之一之间的连接之间或连接到其中之一。 这些其他电路组件可以具有使基于多端口混合型取消网络的至少一个端口的信号回波损耗最小化的配置。 它们可以另外还是具有使多端口混合型取消网络的至少两个端口之间的信号隔离最大化的配置。