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27 条记录 (耗时 0.021 秒)

    HYDRATION SENSOR
    2.
    发明申请
    HYDRATION SENSOR 审中-公开

    公开(公告)号：US20180231475A1

    公开(公告)日：2018-08-16

    申请号：US15489176

    申请日：2017-04-17

    申请人： Elliott R. Brown ,  Weidong Zhang

    发明人： Elliott R. Brown ,  Weidong Zhang

    IPC分类号： G01N22/04 ,  A61B5/00 ,  A61B5/05

    CPC分类号： A61B5/7228 ,  A61B5/05 ,  A61B5/443 ,  A61B5/4875 ,  A61B5/7203 ,  A61B5/7225 ,  A61B2562/029

    摘要： A hydration sensor is provided that includes a circulator having a plurality of ports, an amplitude-modulated coherent source connected to a first port of the circulator, a rectifier or other power sensor connected to a second port of the circulator followed by an RF baseband low-noise amplifier, a coupling structure connected to the third port of the circulator, and a demodulator connected to the output of the rectifier. The hydration sensor can include an RF low noise amplifier between the circulator and rectifier, and/or a second amplitude modulator between the circulator and the coupling structure. The coupling structure can be either a guided-wave near-field structure or an interfacial capacitive or inductive element. In the former case, the hydration is determined by measuring the reflectivity of the guided-wave radiation, and in the latter case it is determined by measuring the change of reflectivity (through change of impedance) of the interfacial element.

    Hydration sensor
    3.
    发明授权
    Hydration sensor 有权

    公开(公告)号：US10575787B2

    公开(公告)日：2020-03-03

    申请号：US15489176

    申请日：2017-04-17

    申请人： Elliott R. Brown ,  Weidong Zhang

    发明人： Elliott R. Brown ,  Weidong Zhang

    IPC分类号： A61B18/14 ,  A61B5/00 ,  A61B5/05

    摘要： A hydration sensor is provided that includes a circulator having a plurality of ports, an amplitude-modulated coherent source connected to a first port of the circulator, a rectifier or other power sensor connected to a second port of the circulator followed by an RF baseband low-noise amplifier, a coupling structure connected to the third port of the circulator, and a demodulator connected to the output of the rectifier. The hydration sensor can include an RF low noise amplifier between the circulator and rectifier, and/or a second amplitude modulator between the circulator and the coupling structure. The coupling structure can be either a guided-wave near-field structure or an interfacial capacitive or inductive element. In the former case, the hydration is determined by measuring the reflectivity of the guided-wave radiation, and in the latter case it is determined by measuring the change of reflectivity (through change of impedance) of the interfacial element.

    Photoconductive optical correlator
    5.
    发明授权
    Photoconductive optical correlator 失效
    光导光学相关器

    公开(公告)号：US5900624A

    公开(公告)日：1999-05-04

    申请号：US654642

    申请日：1996-05-29

    申请人： Simon Verghese ,  Elliott R. Brown ,  Qing Hu

    发明人： Simon Verghese ,  Elliott R. Brown ,  Qing Hu

    IPC分类号： G06E3/00 ,  H01J40/14

    CPC分类号： G06E3/005

    摘要： An optical correlator for correlating incident optical signals is described. The correlator comprises a transmission line in close juxtaposition to a photoconductor. The photoconductor may be positioned within the transmission line. The transmission line and the photoconductor may be monolithically integrated on a substrate. The optical correlator has an electrical non-linear response to the incident optical signals that results from a voltage divider formed from the combination of the transmission line and the photoconductor. The electrical non-linear response is proportional to a second-order intensity autocorrelation function g.sup.(2) (.tau.). The response time of the electrical nonlinear response is less than the width of the narrowest pulse of the optical signals and may be less than twenty picoseconds.

    摘要翻译： 描述了用于相关入射光信号的光相关器。 相关器包括与光电导体紧密并置的传输线。 光电导体可以位于传输线内。 传输线和光电导体可以单片集成在基板上。 光学相关器对由传输线和感光体的组合形成的分压器产生的入射光信号具有电非线性响应。 电非线性响应与二阶强度自相关函数g（2）（τ）成比例。 电子非线性响应的响应时间小于光信号最窄脉冲的宽度，可能小于二十皮秒。

    Highly efficient planar antenna on a periodic dielectric structure
    6.
    发明授权
    Highly efficient planar antenna on a periodic dielectric structure 失效
    高效平面天线在周期性电介质结构上

    公开(公告)号：US5386215A

    公开(公告)日：1995-01-31

    申请号：US979291

    申请日：1992-11-20

    申请人： Elliott R. Brown

    发明人： Elliott R. Brown

    IPC分类号： H01Q1/38 ,  H01Q9/06 ,  H01Q15/00 ,  H01Q21/00 ,  H01Q21/06 ,  H01Q9/28

    CPC分类号： H01Q15/006 ,  H01Q1/38 ,  H01Q21/0093 ,  H01Q21/062 ,  H01Q9/065

    摘要： Efficient transmission and reception of electromagnetic radiation are achieved by an antenna on a substrate. An antenna is fabricated on the top surface of a substrate which includes a periodic dielectric structure. The antenna operates at a frequency within the band gap of the periodic dielectric structure. Radiation emitted by the antenna cannot propagate through the structure and is therefore emitted only into space away from the substrate. When the antenna is receiving, radiation striking the device does not propagate through the substrate but is concentrated at the antenna. A phased array with isolated elements is achieved by fabricating the array elements on top of a substrate having a periodic dielectric structure and by surrounding the circuits associated with each antenna element with the periodic dielectric structure. Radiation from an element or associated circuitry at a frequency within the band gap of the structure cannot propagate into the substrate to interfere with other elements.

    摘要翻译： 通过基板上的天线实现电磁辐射的高效传输和接收。 在包括周期性电介质结构的衬底的顶表面上制造天线。 天线以周期性电介质结构的带隙内的频率工作。 由天线发射的辐射不能传播通过该结构，因此仅发射离开衬底的空间。 当天线接收时，撞击设备的辐射不会传播通过基板，而是集中在天线。 具有隔离元件的相控阵列通过在具有周期性电介质结构的衬底的顶部上制造阵列元件并且通过周期性介电结构围绕与每个天线元件相关联的电路来实现。 在结构的带隙内的频率处的元件或相关联的电路的辐射不能传播到衬底中以干扰其他元件。

    THz distributed detectors and arrays
    7.
    发明授权
    THz distributed detectors and arrays 有权
    太赫兹分布式检测器和阵列

    公开(公告)号：US09356170B2

    公开(公告)日：2016-05-31

    申请号：US14215804

    申请日：2014-03-17

    申请人： Elliott R. Brown ,  John R. Middendorf ,  John S. Cetnar

    发明人： Elliott R. Brown ,  John R. Middendorf ,  John S. Cetnar

    IPC分类号： H01L31/0352 ,  H01L31/108 ,  G01N21/552

    CPC分类号： H01L31/035281 ,  G01N21/554 ,  H01L31/03046 ,  H01L31/035209 ,  H01L31/108 ,  Y02E10/544 ,  Y02P70/521

    摘要： Terahertz (THz) distributed detectors, and arrays of detectors that utilize structured surface plasmonic effects for more efficient coupling to free space are discussed. One example distributed detector includes a detector junction comprising a Schottky or tunneling interface between a semiconductor and a detector metal, an ohmic junction comprising an ohmic interface between the semiconductor and an ohmic metal, and a gap that separates the detector junction from the ohmic junction. Structured surface plasmons concentrate an electric field in the gap when the distributed detector is exposed to THz radiation polarized perpendicular to the gap.

    摘要翻译： 讨论了太赫兹（THz）分布式检测器和利用结构化表面等离子体效应的检测器阵列，以更有效地耦合到自由空间。 一个示例性分布式检测器包括检测器结，其包括在半导体和检测器金属之间的肖特基或隧道界面，包括半导体和欧姆金属之间的欧姆接口的欧姆接头以及将检测器接头与欧姆接头分开的间隙。 当分布式检测器暴露于垂直于间隙偏振的THz辐射时，结构化表面等离子体质子将间隙中的电场集中。

    THz DISTRIBUTED DETECTORS AND ARRAYS
    8.
    发明申请
    THz DISTRIBUTED DETECTORS AND ARRAYS 有权
    太赫兹分布式检测器和阵列

    公开(公告)号：US20150280036A1

    公开(公告)日：2015-10-01

    申请号：US14215804

    申请日：2014-03-17

    申请人： Elliott R. Brown ,  John R. Middendorf ,  John S. Cetnar

    发明人： Elliott R. Brown ,  John R. Middendorf ,  John S. Cetnar

    IPC分类号： H01L31/0352 ,  H01L27/146 ,  H01L31/108

    CPC分类号： H01L31/035281 ,  G01N21/554 ,  H01L31/03046 ,  H01L31/035209 ,  H01L31/108 ,  Y02E10/544 ,  Y02P70/521

    摘要： Terahertz (THz) distributed detectors, and arrays of detectors that utilize structured surface plasmonic effects for more efficient coupling to free space are discussed. One example distributed detector includes a detector junction comprising a Schottky or tunneling interface between a semiconductor and a detector metal, an ohmic junction comprising an ohmic interface between the semiconductor and an ohmic metal, and a gap that separates the detector junction from the ohmic junction. Structured surface plasmons concentrate an electric field in the gap when the distributed detector is exposed to THz radiation polarized perpendicular to the gap.

    摘要翻译： 讨论了太赫兹（THz）分布式检测器和利用结构化表面等离子体效应的检测器阵列，以更有效地耦合到自由空间。 一个示例性分布式检测器包括检测器结，其包括在半导体和检测器金属之间的肖特基或隧道界面，包括半导体和欧姆金属之间的欧姆接口的欧姆接头以及将检测器接头与欧姆接头分开的间隙。 当分布式检测器暴露于垂直于间隙偏振的THz辐射时，结构化表面等离子体质子将间隙中的电场集中。

    RETRODIRECTIVE TRANSMIT AND RECEIVE RADIO FREQUENCY SYSTEM BASED ON PSEUDORANDOM MODULATED WAVEFORMS
    9.
    发明申请
    RETRODIRECTIVE TRANSMIT AND RECEIVE RADIO FREQUENCY SYSTEM BASED ON PSEUDORANDOM MODULATED WAVEFORMS 有权
    基于PSEUDORANDOR调制波形的反向发射和接收无线电频率系统

    公开(公告)号：US20110084879A1

    公开(公告)日：2011-04-14

    申请号：US11757324

    申请日：2007-06-01

    申请人： Elliott R. Brown ,  Rodney F. Sinclair

    发明人： Elliott R. Brown ,  Rodney F. Sinclair

    IPC分类号： H01Q1/00

    CPC分类号： H01Q3/2647

    摘要： Embodiments provide radio-frequency systems that can automatically detect, focus-on, and track objects in the environment without the need for expensive electronic scanning and phase-shifting components. Some embodiments are directed to retrodirective systems including: (1) quiescently broadcast pseudorandom-modulated radiation, such as pseudorandom bit sequences, in the absence of a target, over a field-of-view comparable to the beam solid angle of a single element in the transmit array; (2) a receive antenna element or array, in a desired spatial relationship with respect to the transmit antenna array, that receives reflected pseudorandom radiation from a target; and (3) an electronic signal-processing and feedback channel between the receive and transmit arrays that carries out cross-correlation between the received radiation and the transmitted pseudorandom signals and computes complex correlation coefficients to form a re-transmitted beam. Some embodiments are useful for short-range applications involving small and fast moving targets.

    摘要翻译： 实施例提供了能够自动检测，聚焦和跟踪环境中的物体而不需要昂贵的电子扫描和相移部件的射频系统。 一些实施例涉及逆向系统，包括：（1）在不存在目标的情况下，静态地广播伪随机调制的辐射，诸如伪随机比特序列，可以与单个元素的波束立体角相当 发射阵列; （2）接收天线元件或阵列，其以相对于发射天线阵列的期望的空间关系接收来自目标的反射伪随机辐射; 以及（3）接收和发射阵列之间的电子信号处理和反馈信道，其执行所接收的辐射与所发射的伪随机信号之间的互相关，并且计算复相关系数以形成再发射波束。 一些实施例对于涉及小型和快速移动目标的短距离应用是有用的。