专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06639205B2 Optically controlled MEM switches 有权
标题翻译：光控MEM开关
公开(公告)号：US06639205B2
公开(公告)日：2003-10-28
申请号：US09978314
申请日：2001-10-15
申请人： Tsung-Yuan Hsu , Robert Y. Loo , Greg Tangonan , Juan F. Lam
发明人： Tsung-Yuan Hsu , Robert Y. Loo , Greg Tangonan , Juan F. Lam
IPC分类号： G01J136
CPC分类号： H01H59/0009 , H01H1/0036 , H01H47/24 , H01H67/22
摘要： An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.
摘要翻译：描述了一种光学控制的微机电（MEM）开关，其理想地利用其上制造有MEM开关的半导体基板的光导特性。在一个实施例中，通过照亮开关的光电部分来改变为开关的启动提供的偏置电压，以使开关失效。在替代实施例中，光伏器件提供电压以完全启动开关而没有任何偏置线。由于作为施加电压的函数的机电开关的滞后，仅需要施加到开关的电压的适度变化，以使开关在光学控制下急剧地打开或闭合。

2. 发明授权

US07119732B1 Bistatic and multistatic system for space situational awareness 有权
标题翻译：用于空间情境意识的双基地和多基系统
公开(公告)号：US07119732B1
公开(公告)日：2006-10-10
申请号：US11292014
申请日：2005-12-01
申请人： Juan F. Lam , Theofanis Mavromatis
发明人： Juan F. Lam , Theofanis Mavromatis
IPC分类号： G01S13/04 , G01S13/06 , G01S13/89 , G01S13/90 , G01S7/40
CPC分类号： G01S13/003 , G01S13/58 , G01S13/9035 , G01S2013/9064
摘要： Provided is a bistatic and multistatic system for detecting and identifying a target in close proximity to an orbiting satellite. An electromagnetic fence is established to surround the satellite, using a ground-based communication uplink from a gateway antenna. A contact or breach of the electromagnetic fence by the target is detected by the satellite, or at other sensor locations, and an exact position, range and ISAR image of the target is calculated using scattered RF energy from the fence. Identification data is transmitted to satellite system monitors, whereby the data is used to decide on a corrective course of action.
摘要翻译：提供了用于检测和识别靠近轨道卫星的目标的双基地和多基地系统。建立电磁围栏以围绕卫星，使用来自网关天线的基于地面的通信上行链路。由卫星或其他传感器位置检测目标的电磁围栏的接触或破裂，并使用来自围栏的分散的射频能量来计算目标的精确位置，范围和ISAR图像。识别数据被传送到卫星系统监视器，由此数据用于决定纠正行动过程。

3. 发明授权

US06307519B1 Multiband antenna system using RF micro-electro-mechanical switches, method for transmitting multiband signals, and signal produced therefrom 有权
标题翻译：使用RF微机电开关的多频带天线系统，用于发送多频带信号的方法和由其产生的信号
公开(公告)号：US06307519B1
公开(公告)日：2001-10-23
申请号：US09470700
申请日：1999-12-23
申请人： Stan W. Livingston , Jar J. Lee , Robert Y. Loo , Juan F. Lam
发明人： Stan W. Livingston , Jar J. Lee , Robert Y. Loo , Juan F. Lam
IPC分类号： H01Q1300
CPC分类号： H01Q13/10
摘要： A method and system for transmitting, and a signal comprising multiple frequency bands from a single slot antenna are disclosed. The system comprises a slot antenna and a micro-electro-mechanical (MEM) switch, coupled to the slot antenna. The MEM switch is opened and closed, thereby changing the resonant frequency of the slot antenna. The slot antenna transmits a first frequency when the MEM switch is open and a second frequency when the MEM switch is closed. The method for transmitting a first frequency and a second frequency from a slot antenna comprises the steps of transmitting the first frequency from the slot antenna, closing a micro-electro-mechanical (MEM) switch coupled across the slot antenna, therein changing the resonant frequency of the slot antenna, and transmitting the second frequency from the slot antenna after the MEM switch is closed. A signal comprising a first and second frequency in accordance with the present invention is transmitted by an array of antennas, wherein the array of antennas comprises at least one slot, the slot being reconfigurable through a RF MEM switch coupled to the slot, by performing the steps of transmitting the first frequency from the slot antenna, closing a micro-electro-mechanical (MEM) switch coupled across the slot antenna, therein changing the resonant frequency of the slot antenna, and transmitting the second frequency from the slot antenna after the MEM switch is closed.
摘要翻译：公开了一种用于从单个时隙天线发送和包括多个频带的信号的方法和系统。该系统包括缝隙天线和耦合到缝隙天线的微机电（MEM）开关。 MEM开关被打开和关闭，从而改变缝隙天线的谐振频率。当MEM开关打开时，缝隙天线发送第一个频率，当MEM开关闭合时，发射第二个频率。用于从缝隙天线发送第一频率和第二频率的方法包括以下步骤：从缝隙天线发射第一频率，闭合跨越缝隙天线耦合的微机电（MEM）开关，其中改变谐振频率并且在MEM开关闭合之后从缝隙天线发送第二频率。根据本发明的包括第一和第二频率的信号由天线阵列传输，其中天线阵列包括至少一个时隙，所述时隙可通过耦合到时隙的RF MEM开关重新配置，通过执行从缝隙天线发送第一频率的步骤，闭合跨越缝隙天线耦合的微机电（MEM）开关，其中改变缝隙天线的谐振频率，以及在MEM之后从缝隙天线发射第二频率开关关闭。

4. 发明授权

US5859611A Mixing and modulating methods and structures using nonlinear optical amplifiers 失效
标题翻译：使用非线性光学放大器的混合和调制方法和结构
公开(公告)号：US5859611A
公开(公告)日：1999-01-12
申请号：US803963
申请日：1997-02-21
申请人： Juan F. Lam , Ronald R. Stephens , Gregory L. Tangonan
发明人： Juan F. Lam , Ronald R. Stephens , Gregory L. Tangonan
IPC分类号： H01Q3/22 , H01Q3/26 , H04B10/17 , G02F1/03
CPC分类号： H04B10/2914 , H01Q3/22 , H01Q3/2676
摘要： Mixing and modulating methods are described for nonlinear optical amplifiers (30) which can generate intermodulation products of radio-frequency signals in an optical carrier signal (26) without the penalty of an optical conversion loss and without the need for radio-frequency mixers, electro-optic modulators and expensive polarization-maintaining optical fibers. The radio-frequency signals can be applied to either a bias port (36) or an optical input port (32) of the optical amplifier and are used to upconvert and downconvert signals in phased-array antenna and remote antenna embodiments of the invention.
摘要翻译：描述了用于非光学放大器（30）的混合和调制方法，其可以在光载波信号（26）中产生射频信号的互调产物，而不损失光转换损耗，并且不需要射频混频器 - 光学调制器和昂贵的偏振保持光纤。射频信号可以应用于光放大器的偏置端口（36）或光输入端口（32），并用于上变频和下变频本发明的相控阵天线和远端天线实施例中的信号。

5. 发明授权

US5541614A Smart antenna system using microelectromechanically tunable dipole antennas and photonic bandgap materials 失效
标题翻译：使用微机电可调谐偶极天线和光子带隙材料的智能天线系统
公开(公告)号：US5541614A
公开(公告)日：1996-07-30
申请号：US416621
申请日：1995-04-04
申请人： Juan F. Lam , Gregory L. Tangonan , Richard L. Abrams
发明人： Juan F. Lam , Gregory L. Tangonan , Richard L. Abrams
IPC分类号： H01H59/00 , H01Q11/10 , H01Q15/00
CPC分类号： H01Q11/10 , H01Q15/002 , H01Q15/0066 , H01H59/0009
摘要： An antenna system includes a set of symmetrically located center-fed and segmented dipole antennas embedded on top of a frequency selective photonic bandgap crystal. A two-dimensional array of microelectromechanical (MEM) transmission line switches is incorporated into the dipole antennas to connect the segments thereof. An MEM switch is located at the intersection between any two adjacent segments of the antenna arm. The segments can be connected (disconnected) by operating the switch in the closed (open) position. Appropriate manipulation or programming of the MEM switches will change the radiation pattern, scanning properties and resonance frequency of the antenna array. In addition, an MEM switch is inserted into the crystal to occupy a lattice site in the 3-dimensional crystal lattice. The crystal will have a broadband stopgap if the MEM switch operates in the closed position (perfect symmetry of the crystal), and will produce a narrowband absorption line inside the stopgap if the MEM switch is in the open position, thereby permitting change in real time of the frequency response of the crystal.
摘要翻译：天线系统包括嵌入在频率选择性光子带隙晶体顶部的对称定位的中心馈电和分段偶极天线的集合。将微机电（MEM）传输线开关的二维阵列并入到偶极天线中以连接它们的段。 MEM开关位于天线臂的任何两个相邻段之间的相交处。通过在闭合（打开）位置操作开关可以将段连接（断开）。对MEM开关的适当的操作或编程将改变天线阵列的辐射图，扫描特性和谐振频率。另外，将MEM开关插入到晶体中以占据3维晶格中的晶格位置。如果MEM开关工作在闭合位置（晶体的完美对称性），则晶体将具有宽带停止点，并且如果MEM开关处于打开位置，将在停止位置内产生窄带吸收线，从而允许实时改变的晶体的频率响应。

6. 发明授权

US5369522A Modulation system and method with third order intermodulation distortion reduction 失效
标题翻译：具有三阶互调失真减小的调制系统和方法
公开(公告)号：US5369522A
公开(公告)日：1994-11-29
申请号：US892842
申请日：1992-06-03
申请人： Gregory L. Tangonan , Juan F. Lam
发明人： Gregory L. Tangonan , Juan F. Lam
IPC分类号： G02B6/122 , G02B6/12 , G02F1/03 , G02F1/035 , G02F1/313 , H04B10/155 , H04B10/14
CPC分类号： G02F1/3132 , H04B10/58 , G02F2203/19
摘要： When an optical signal is modulated at two modulation frequencies, third order intermodulation distortion (IMD) is eliminated by inducing an out-of-phase signal that is complementary to the modulated signal, and cross-coupling the two signals with each other to remove the third order terms. An optical beam in a first waveguide is electro-optically modulated and coupled with a second waveguide to induce the out-of-phase complementary beam therein. A second optical coupler is provided that cross-couples the beams in the two waveguides downstream from the first optical coupler. The optical coupling coefficients, the coupler lengths, and the differential between the optical propagation coefficients of the two waveguides within the first coupler are selected empirically to substantially negate third order IMD. The differential in propagation coefficients is established by the DC bias of the modulation signal. Enhanced linearity can be obtained by inducing a compensating phase shift either in the second optical coupler, or between the first and second optical couplers.
摘要翻译：当光信号在两个调制频率被调制时，通过诱导与调制信号互补的异相信号并且将两个信号彼此交叉耦合以去除第三阶互调失真（IMD）来消除三级条款。第一波导中的光束被电光调制并且与第二波导耦合以在其中诱发异相互补光束。提供了第二光耦合器，其将第一光耦合器下游的两个波导中的光束交叉。根据经验选择光耦合系数，耦合器长度以及第一耦合器内的两个波导的光传播系数之间的差分，以基本上否定三阶IMD。传播系数的差分由调制信号的直流偏压确定。通过在第二光耦合器中或在第一和第二光耦合器之间引起补偿相移可以获得增强的线性度。

7. 发明申请

US20100277372A1 SYSTEM AND METHOD FOR OPERATING A RADAR SYSTEM IN A CONTINUOUS WAVE MODE FOR DATA COMMUNICATION 有权
标题翻译：用于在数据通信的连续波形模式下操作雷达系统的系统和方法
公开(公告)号：US20100277372A1
公开(公告)日：2010-11-04
申请号：US12435379
申请日：2009-05-04
申请人： Juan F. Lam , Scott D. Whittle , Min S. Hong , Charles F. Kaminski , Robert E. Shuman , Harold B. Rounds , Daniel D. Gee
发明人： Juan F. Lam , Scott D. Whittle , Min S. Hong , Charles F. Kaminski , Robert E. Shuman , Harold B. Rounds , Daniel D. Gee
IPC分类号： G01S13/00 , H01Q3/00
CPC分类号： G01S7/006 , G01S7/282 , G01S2013/0254
摘要： A system and a method for operating a radar system in a continuous wave mode for communicating information are provided. In one embodiment, the invention relates to a method for operating a radar system, having an antenna including a plurality of active array elements, in a continuous wave mode to communicate information, the method including receiving an instruction to enter the continuous wave mode, loading a plurality of tables, where each table includes information indicative of a primary group of the active array elements to be activated and a secondary group of elements to be deactivated, receiving a communication signal to be transmitted, and providing, repeatedly, the communication signal, for a preselected period of time, to the primary group of elements of each of the plurality of tables.
摘要翻译：提供了一种用于以连续波模式操作用于传送信息的雷达系统的系统和方法。在一个实施例中，本发明涉及一种用于操作雷达系统的方法，该雷达系统具有连续波模式的具有多个有源阵列元件的天线以传送信息，所述方法包括接收进入连续波模式的指令，加载多个表，其中每个表包括指示要激活的有源阵列元件的主组的信息和要被去激活的第二组元件，接收要发送的通信信号，并且重复提供通信信号，对于预选的时间段，到多个表中的每一个的主要元素组。

8. 发明申请

US20070288132A1 Cooperative swarm of unmanned vehicles 审中-公开
标题翻译：无人车合作群
公开(公告)号：US20070288132A1
公开(公告)日：2007-12-13
申请号：US11448554
申请日：2006-06-07
申请人： Juan F. Lam
发明人： Juan F. Lam
IPC分类号： G05D1/00 , G01C21/00
CPC分类号： G05D1/0278 , G05D1/0297 , G05D1/104 , G05D2201/0209
摘要： A cooperative swarm of unmanned vehicles includes a plurality of unmanned vehicles, each having a location identification system operable to provide location coordinates; a transceiver operable to send and receive location coordinates via omnipresent signals of opportunity, and a guidance system operable to selectively guide the unmanned vehicle towards an identified target and a specified location within an environment. Access to omnipresent signals of opportunity facilitates transmissions indicative of the identified target and/or location between unmanned vehicles in an environment, e.g., an urban environment, where direct line of sight contact is limited. In a related method, at least one omnipresent signal of opportunity is detected within an environment. Location coordinates are transmitted between unmanned vehicles via the detected signal. Collective evaluation facilitates identification of a target within the environment and, and responsive to such identification, at least a subset of the unmanned vehicles are moved to the target's location.
摘要翻译：一组无人驾驶车辆包括多个无人驾驶车辆，每个无人车辆都具有可操作以提供位置坐标的位置识别系统; 收发器，其可操作以经由无所不在的机会信号发送和接收位置坐标;以及引导系统，其可操作以选择性地将所述无人驾驶员引向所识别的目标和环境内的指定位置。访问无所不在的机会信号有助于在环境（例如直接视线接触限制的城市环境）中指示所识别的目标和/或无人驾驶车辆之间的位置的传输。在相关方法中，在环境内检测到至少一个无所不在的机会信号。位置坐标通过检测到的信号在无人驾驶车辆之间传输。集体评估有助于在环境中识别目标，并且响应于这种识别，将至少一部分无人驾驶车辆移动到目标的位置。

9. 发明授权

US5541613A Efficient broadband antenna system using photonic bandgap crystals 失效
标题翻译：使用光子带隙晶体的高效宽带天线系统
公开(公告)号：US5541613A
公开(公告)日：1996-07-30
申请号：US333913
申请日：1994-11-03
申请人： Juan F. Lam , Ronald I. Wolfson , Jerome Glaser
发明人： Juan F. Lam , Ronald I. Wolfson , Jerome Glaser
IPC分类号： H01Q11/10 , H01Q15/00 , H01Q11/00
CPC分类号： H01Q15/006 , H01Q11/10
摘要： A broadband antenna system utilizes multiple photonic bandgap crystals to achieve nearly 100 percent power efficiency over a larger range of frequencies than prior antenna systems. Multiple custom tailored photonic bandgap crystals form a substrate for the antenna system. Each of the crystals is designed to cover a specific range of frequencies. The multiple crystals are attached together to form a photonic bandgap substrate whose bandwidth varies as a function of location on the substrate. A broadband antenna that can cover a wide frequency range, and whose active region shifts to different portions of the antenna as a function of frequency, is formed on the substrate such that the active region of the antenna is always on a crystal that has a corresponding operating bandwidth. The photonic bandgap crystals provide a nearly 100 percent efficient reflector for radiation emitted into the substrate that would otherwise be trapped or dissipated therein.
摘要翻译：宽带天线系统利用多个光子带隙晶体在比现有天线系统更大的频率范围内实现近100％的功率效率。多个定制的光子带隙晶体形成天线系统的基板。每个晶体被设计成覆盖特定的频率范围。将多个晶体连接在一起以形成其带宽随着衬底上位置的函数而变化的光子带隙衬底。宽带天线可以覆盖宽的频率范围，并且其有源区域作为频率的函数移动到天线的不同部分，形成在基板上，使得天线的有源区域总是在具有相应的工作带宽。光子带隙晶体为辐射到衬底中的辐射提供了近100％的有效反射器，否则其将被捕获或消散。

10. 发明授权

US5373526A Apparatus and method for optical energy amplification using two-beam coupling 失效
标题翻译：使用双光束耦合的光能放大的装置和方法
公开(公告)号：US5373526A
公开(公告)日：1994-12-13
申请号：US881951
申请日：1992-05-12
申请人： Juan F. Lam , Huan-Wun Yen , Joseph L. Pikulski
发明人： Juan F. Lam , Huan-Wun Yen , Joseph L. Pikulski
IPC分类号： G02B27/10 , G02B6/04 , G02B6/28 , G02B6/42 , G02F1/39 , H01S3/00 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/094 , H01S3/10 , H01S3/23 , H01S3/09
CPC分类号： G02F1/397 , G02B6/04 , G02B6/2856 , G02B6/4206 , H01S3/2383 , H01S3/005 , H01S3/06754 , H01S3/06783
摘要： A diffraction limited working beam at a given frequency is amplified without degrading its diffraction limited quality by diverting a minor portion of the beam as a probe beam, and amplifying the remaining portion of the working beam with a high power pump beam at a different wavelength. The amplification takes place in a host medium that has a rare earth dopant with an energy transition from the pump beam's wavelength to the wavelength of the working beam. The resulting amplified working beam is non-diffraction limited. The probe beam is frequency modulated and coupled with the amplified working beam in a second host medium that also has a rare earth dopant. Energy is transferred from the amplified working beam to the modulated probe beam through a resonant energy transfer in the second host medium, producing an amplified output beam at the working beam frequency that retains the diffraction limited quality of the probe beam.
摘要翻译：在给定频率下的衍射受限工作束被放大，而不会通过转移作为探测光束的光束的较小部分而降低其衍射限制质量，并以不同波长的高功率泵浦光束放大工作光束的剩余部分。放大发生在具有从泵浦波长的波长到工作波长的能量跃迁的稀土掺杂剂的主介质中。所得到的放大工作光束是非衍射受限的。在具有稀土掺杂剂的第二主介质中，探测光束被调频并与放大的工作光束耦合。能量通过第二主介质中的共振能量传递从放大的工作波束传送到调制的探测光束，产生以保持探测光束的衍射限制质量的工作光束频率的放大的输出光束。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式