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    • 4. 发明授权
    • Microwave signal frequency multiplier
    • 微波信号倍频器
    • US5731752A
    • 1998-03-24
    • US633576
    • 1996-04-17
    • James Richard Wood
    • James Richard Wood
    • H03B19/18H01P1/20
    • H03B19/18
    • A microwave signal frequency multiplier is used to produce a harmonic signal derived from a microwave pump signal. In a selected embodiment, a Ka pump signal is converted to a W band microwave signal. The frequency signal multiplier includes a housing having a signal input port and a harmonic signal extraction port. The interior of the housing comprises a pump signal cavity which is tuned to the pump signal. Within the pump signal cavity, there is provided a non-linear material which converts the pump signal to a harmonic, preferably a third harmonic, of the pump signal. A frequency selective barrier within the pump signal cavity defines a harmonic signal cavity. An extraction port is coupled to the harmonic signal cavity for removing the harmonic signal from the multiplier. The frequency selective barrier is essentially transparent to the pump signal but is reflective to the harmonic signal. A preferred embodiment for the non-linear multiplier for producing the harmonic signal is a doped semiconductor superlattice. The frequency selective material may also be fabricated as a superlattice.
    • 微波信号倍频器用于产生从微波泵浦信号得到的谐波信号。 在所选择的实施例中,Ka泵浦信号被转换成W波段微波信号。 频率信号乘法器包括具有信号输入端口和谐波信号提取端口的壳体。 壳体的内部包括泵浦信号腔,其被调谐到泵浦信号。 在泵浦信号腔内,提供了一种非线性材料,其将泵浦信号转换成泵浦信号的谐波,最好是三次谐波。 泵浦信号腔内的频率选择性屏障定义了谐波信号腔。 提取端口耦合到谐波信号腔,以从乘法器去除谐波信号。 频率选择性屏障对于泵浦信号基本上是透明的,但是对谐波信号是反射的。 用于产生谐波信号的非线性乘法器的优选实施例是掺杂的半导体超晶格。 频率选择材料也可以被制造为超晶格。
    • 5. 发明授权
    • Radome with secondary heat shield
    • 带二次隔热罩的天线罩
    • US5691736A
    • 1997-11-25
    • US412193
    • 1995-03-28
    • David Lynn HunnDouglas Ward FreitagJames Richard WoodShawn M. Keough
    • David Lynn HunnDouglas Ward FreitagJames Richard WoodShawn M. Keough
    • H01Q1/28H01Q1/42B64D7/00
    • H01Q1/425
    • A secondary heat shield is positioned within a heat shielding radome and spaced from the nose of the radome in order to protect an antenna against thermal radiation from the inner surface of the radome. The secondary heat shield can be a single unitary component integrally formed of a lightweight ceramic which can be easily fabricated in the desired shape and which maintains its shape. The secondary heat shield can be formed of a lightweight ceramic material having a dielectric constant at 17 GHz and 21.degree. C. in the range of about 1 to about 3.5, a thermal conductivity of less than 0.7 W/M-K, and a density at 21.degree. C. of less than 3.2 g/cc. The most preferred ceramic material has a dielectric constant at 17 GHz and 21.degree. C. in the range of about 1.01 to about 2.0, a thermal conductivity in the range of about 0.04 to about 0.08 W/M-K, and a density at 21.degree. C. of less than about 1.0 g/cc. The secondary heat shield comprises a forward dome portion, which can be shaped to act as a lens for radiation emitted from or received by the antenna, and a rearwardly extending skirt portion which laterally encompasses the antenna and other temperature sensitive components.
    • 次级隔热罩位于隔热天线罩内并与天线罩的鼻部间隔开,以便保护天线免受雷达罩内表面的热辐射。 次级隔热罩可以是由轻质陶瓷一体形成的单一的整体构件,其可以容易地制造成所需形状并且保持其形状。 次级隔热层可由轻质陶瓷材料形成,该陶瓷材料的介电常数为17GHz和21℃,范围为约1至约3.5,热导率小于0.7W / MK,密度为21 ℃小于3.2g / cc。 最优选的陶瓷材料在17GHz和21℃的介电常数在约1.01至约2.0的范围内,热导率在约0.04至约0.08W / MK的范围内,密度在21℃ 小于约1.0g / cc。 次级隔热罩包括前拱顶部分,其可以成形为用于从天线发射或接收的辐射的透镜,以及横向包围天线和其它温度敏感部件的向后延伸的裙部。
    • 6. 发明授权
    • Coruscative white light generator
    • 科幻白光发生器
    • US08621999B1
    • 2014-01-07
    • US13187047
    • 2011-07-20
    • James Richard Wood
    • James Richard Wood
    • F42B4/26
    • F41H3/00F42B1/032F42B3/08
    • An apparatus and method for generating a very bright white light source. The apparatus is a coruscative white light generator, comprising: a shaped charge liner; and a radial line-shaped charge that initiates coruscative reactions in the shaped charge liner. In one aspect, the method comprises initiating coruscative reactions in a shaped charge liner using a radial line-shaped charge. In another aspect, the method comprises subtending a significant portion of an observer field of view while denying said observer the ability to identify targets and/or aim optical devices through large area coverage of about 3,000 to about 5,000 Kelvin particles.
    • 一种用于产生非常亮的白光源的装置和方法。 该装置是一种腐蚀性白光发生器,包括:成形电荷衬垫; 以及在成形的电荷衬垫中引起腐蚀反应的径向线状电荷。 一方面,该方法包括使用径向线状电荷在成形的电荷衬垫中引发腐蚀反应。 在另一方面,该方法包括对准观察者视野的重要部分,同时拒绝所述观察者通过大约3000至大约5,000开尔文粒子的大面积覆盖来识别目标和/或瞄准光学装置的能力。
    • 7. 发明授权
    • X-ray radar
    • X射线雷达
    • US08433037B1
    • 2013-04-30
    • US12604548
    • 2009-10-23
    • James Richard Wood
    • James Richard Wood
    • G01N23/203
    • G01V5/0025
    • A technique for generating three-dimensional information using radio frequency modulated X-rays includes both a method and an apparatus. In a first aspect, the method includes modulating an X-ray signal with first and second radio frequencies; transmitting the modulated X-ray signal; receiving backscatter; and processing the received backscatter to range a target in the field of view. In another aspect, an apparatus includes a transmitter and a receiver. The transmitter is capable of: modulating an X-ray signal with first and second radio frequencies and transmitting the modulated X-ray signal into a field of view. The receiver is capable of receiving backscatter from the transmitted X-ray signal. Other aspects include variations on these. For example, some aspects are computer implemented, such as a software implemented method, a program storage medium encoded with instruction to perform such a method, and a computing apparatus performed to program such a method.
    • 使用射频调制X射线产生三维信息的技术包括方法和装置。 在第一方面,该方法包括:利用第一和第二射频调制X射线信号; 发射调制的X射线信号; 接收反向散射 并且处理所接收的反向散射以在视野范围内的目标。 在另一方面,一种装置包括发射机和接收机。 发射机能够:用第一和第二无线电频率调制X射线信号,并将调制的X射线信号传输到视场。 接收机能够从所传输的X射线信号接收反向散射。 其他方面包括这些变化。 例如,一些方面是计算机实现的,例如软件实现的方法,用指令执行这种方法编码的程序存储介质,以及用于对这种方法进行编程的计算装置。
    • 8. 发明授权
    • Q-switched cavity multiplier
    • Q开关腔倍增器
    • US06297716B1
    • 2001-10-02
    • US09464880
    • 1999-12-16
    • James Richard Wood
    • James Richard Wood
    • H01P100
    • H03B5/1817
    • A switched frequency multiplier receives pulses of pump energy as an input signal. The input signal is transferred to within a housing having a first cavity tuned to the frequency of the pump signal and a second cavity which is tuned to a harmonic of the input signal and is enclosed within the first cavity. An outlet port couples the second tuned cavity to a waveguide which includes a Q-switch that can be turned on and off. The interior of the housing has a planar grid of layers which includes a layer of nonlinear material and a frequency selective layer. The frequency selective layer is transparent to the input signal but reflective to the harmonic output signal thereby trapping energy in the second cavity. The multiplier operates by receiving a pump pulse and storing the energy while the Q-switch is closed. When the Q-switch is opened near the end of the pump pulse, the stored energy is suddenly released to produce a relatively high energy harmonic pulse having a shorter duration than the pump pulse.
    • 开关倍频器接收泵浦能量的脉冲作为输入信号。 输入信号被传送到具有调谐到泵浦信号的频率的第一腔的壳体内,以及调谐到输入信号的谐波并被包围在第一空腔内的第二腔。 出口端口将第二调谐腔耦合到波导,该波导包括可以打开和关闭的Q开关。 壳体的内部具有包括非线性材料层和频率选择层的层的平面网格。 频率选择层对于输入信号是透明的,但反射到谐波输出信号,从而在第二腔中捕获能量。 乘法器通过接收泵浦脉冲并在Q开关闭合时存储能量来操作。 当泵浦脉冲结束时开启Q开关时,储存的能量被突然释放以产生比泵脉冲持续时间更短的相对较高的能量谐波脉冲。
    • 9. 发明授权
    • Parametric cavity microwave amplifier
    • 参数腔微波放大器
    • US06281746B1
    • 2001-08-28
    • US09465496
    • 1999-12-16
    • James Richard Wood
    • James Richard Wood
    • H03F700
    • H03B5/1817
    • A microwave parametric amplifier uses a circulator to receive an input signal which is provided through a transfer port to an input signal resonant cavity. A pump signal, which is preferably a harmonic of the input signal, is received into a pump signal cavity which is defined by a barrier that is reflective to the pump signal and transmissive to the input signal. A non-linear medium is positioned within the pump signal cavity to produce carriers due to the energy of the pump signal. The input signal interacts with the carriers to produce an amplified input signal which is conveyed from the input signal cavity through the circulator to an output port of the circulator.
    • 微波参数放大器使用循环器来接收通过传送端口提供给输入信号谐振腔的输入信号。 优选地,输入信号的谐波的泵浦信号被接收到由信号反射并且对输入信号透射的屏障限定的泵浦信号空腔中。 由于泵浦信号的能量,非线性介质位于泵浦信号腔内以产生载流子。 输入信号与载波相互作用以产生放大的输入信号,该输入信号从输入信号腔通过循环器输送到循环器的输出端口。
    • 10. 发明授权
    • Q-switched parametric cavity amplifier
    • Q开关参数腔放大器
    • US06265934B1
    • 2001-07-24
    • US09464877
    • 1999-12-16
    • James Richard Wood
    • James Richard Wood
    • H03F700
    • H03B5/1817
    • A Q-switched parametric cavity microwave amplifier has input and output ports for receiving an input signal and producing a switched amplified output signal. A pump signal, preferably at a harmonic of the input signal, is received through a pump signal port and provided to a pump signal cavity within a housing. The pump signal interacts with a non-linear medium to produce carriers. A frequency selective layer reflects the pump signal but permits the input signal to pass therethrough. The input signal interacts with the carriers produced in the non-linear medium to enhance the signal present within the resonant cavity for the input signal. This transfers energy from the pump signal to the lower frequency input signal. A Q-switch is positioned in series with the output waveguide to cause energy to be stored within the input signal cavity. When the Q-switch is opened, a pulse is produced representing an amplified version of the input signal.
    • Q开关参数腔微波放大器具有用于接收输入信号并产生开关放大输出信号的输入和输出端口。 优选地在输入信号的谐波处的泵浦信号通过泵信号端口接收并提供给壳体内的泵信号腔。 泵信号与非线性介质相互作用以产生载体。 频率选择层反映了泵浦信号,但允许输入信号通过。 输入信号与在非线性介质中产生的载波相互作用,以增强存在于谐振腔内的输入信号的信号。 这将能量从泵浦信号传输到较低频率的输入信号。 Q开关与输出波导串联定位,以将能量存储在输入信号腔内。 当Q开关打开时,产生表示输入信号的放大版本的脉冲。