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    • 2. 发明授权
    • Photoconductive optical correlator
    • 光导光学相关器
    • US5900624A
    • 1999-05-04
    • US654642
    • 1996-05-29
    • Simon VergheseElliott R. BrownQing Hu
    • Simon VergheseElliott R. BrownQing Hu
    • G06E3/00H01J40/14
    • G06E3/005
    • 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.
    • 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。
    • 3. 发明授权
    • Highly efficient planar antenna on a periodic dielectric structure
    • 高效平面天线在周期性电介质结构上
    • US5386215A
    • 1995-01-31
    • US979291
    • 1992-11-20
    • Elliott R. Brown
    • Elliott R. Brown
    • H01Q1/38H01Q9/06H01Q15/00H01Q21/00H01Q21/06H01Q9/28
    • H01Q15/006H01Q1/38H01Q21/0093H01Q21/062H01Q9/065
    • 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.
    • 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。
    • 6. 发明申请
    • RETRODIRECTIVE TRANSMIT AND RECEIVE RADIO FREQUENCY SYSTEM BASED ON PSEUDORANDOM MODULATED WAVEFORMS
    • 基于PSEUDORANDOR调制波形的反向发射和接收无线电频率系统
    • US20110084879A1
    • 2011-04-14
    • US11757324
    • 2007-06-01
    • Elliott R. BrownRodney F. Sinclair
    • Elliott R. BrownRodney F. Sinclair
    • H01Q1/00
    • H01Q3/2647
    • 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.
    • 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。