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    • 2. 发明授权
    • Hi-Z (photonic band gap isolated) wire
    • Hi-Z(光子带隙隔离)导线
    • US06567057B1
    • 2003-05-20
    • US09659392
    • 2000-09-11
    • Daniel SievenpiperRobin J. Harvey
    • Daniel SievenpiperRobin J. Harvey
    • H01Q1502
    • H01Q15/008H01Q1/12H01Q19/13
    • A high impedance (Hi-Z) wire effectively transparent to electromagnetic radiation polarized in the direction of the wire, within an operating frequency band. The Hi-Z wire is sheathed with a thin layer of resonant structures that are small compared to the wavelength, and behave as a kind of photonic band gap (PBG) material. A frequency-selective polarizer comprising a plurality of Hi-Z wires disposed parallel to one other in a grid. A wire grid reflector that enables stepwise phase control of the reflected wave and focusing of radiative power, the reflector comprising Hi-Z wires interspersed with conventional wires disposed parallel to one another in a grid.
    • 在工作频带内,高阻抗(Hi-Z)线对在线方向上偏振的电磁辐射有效地透明。 Hi-Z线被覆有与波长相比较小的谐振结构的薄层,并且表现为一种光子带隙(PBG)材料。 一种频率选择性偏振器,包括在栅格中彼此平行设置的多个Hi-Z线。 一种线栅反射器,其能够对反射波进行逐步相位控制并且对辐射功率进行聚焦,所述反射器包括散布有以网格彼此平行布置的常规电线的Hi-Z导线。
    • 3. 发明授权
    • Tunable-impedance spiral
    • 可调阻抗螺旋
    • US06323826B1
    • 2001-11-27
    • US09537583
    • 2000-03-28
    • Daniel SievenpiperRobin J. Harvey
    • Daniel SievenpiperRobin J. Harvey
    • H01Q340
    • H01Q15/141H01Q15/0066H01Q15/14H01Q15/24
    • A method and apparatus for providing a high impedance structure or surface comprising at least one electrically conductive wire forming at least one elongate wire spiral, the at least one elongate wire spiral being defined by a plurality of spirals of said at least one wire, the spirals having a pitch and being spaced apart along a major axis of said elongate wire spiral; and an arrangement for varying the pitch of the spirals of said at least one wire to thereby tune the impedance of said tuneable impedance structure. An embodiment useful as an antenna aperture to steer a radio frequency beam having two different polarizations is disclosed.
    • 一种用于提供高阻抗结构或表面的方法和装置,包括形成至少一根细长线螺旋的至少一个导电线,所述至少一根细长线螺旋由所述至少一根线的多个螺旋线限定,螺旋 具有间距并且沿着所述细长线螺旋的长轴间隔开; 以及用于改变所述至少一根线的螺旋桨距的装置,从而调节所述可调阻抗结构的阻抗。 公开了一种用作转向具有两个不同偏振的射频波束的天线孔径的实施例。
    • 4. 发明授权
    • Ribbon beam free electron laser
    • 带状光束自由电子激光器
    • US4888776A
    • 1989-12-19
    • US283663
    • 1988-12-13
    • Franklin A. DolezalRobin J. Harvey
    • Franklin A. DolezalRobin J. Harvey
    • H01S3/09
    • H01S3/0903
    • An FEL array is comprised of adjacent FEL modules. Each module preferably uses a ribbon beam plasma-anode E-gun (PAG) or another plasma-assisted E-gun to produce a planar E-beam that interacts with a planar wiggler magnetic field. The modules may share a common electron gun. A control signal is input through a phase priming array to preselect the radiation mode. A planar, distributed Bragg resonator/reflector is used to set up a high-Q cavity, enabling the low gain module to produce high power radiation. The FEL modules are arranged in an array to reduce the output radiation flux density while achieving high output power density in the far-field, and to permit beam steering by phase control of individual modules. The relatively low current density of the individual E-guns lessens the size of the guiding magnetic field in each module to the extent that the wiggler magnetic field alone is sufficient to perform this guiding function.
    • FEL阵列由相邻的FEL模块组成。 每个模块优选使用带状束等离子体 - 阳极电子枪(PAG)或另一等离子体辅助电子枪来产生与平面摆动磁场相互作用的平面电子束。 模块可以共享一个共同的电子枪。 通过相位启动阵列输入控制信号以预选放射模式。 平面分布式布拉格谐振器/反射器用于建立高Q腔,使低增益模块能够产生高功率辐射。 FEL模块被布置成阵列以减少输出辐射通量密度,同时在远场实现高输出功率密度,并允许通过各个模块的相位控制进行波束控制。 单个电子枪的相对较低的电流密度减小了每个模块中引导磁场的尺寸,使得仅仅摆动磁场足以执行该引导功能的程度。
    • 6. 发明授权
    • Plasma-anode electron gun
    • 等离子体 - 阳极电子枪
    • US4707637A
    • 1987-11-17
    • US842960
    • 1986-03-24
    • Robin J. Harvey
    • Robin J. Harvey
    • H01J23/06H01J3/02H01J37/073H01J37/077H01J7/24H05B31/26
    • H01J3/021
    • A plasma-anode electron gun includes a cathode means of a material such as molybdenum having a relatively high ratio of emission of secondary electrons to impinging helium ions. A hollow annular anode structure (16) contains an ionized plasma, and has a central opening (38) through which the electron beam (36) is directed, when ions from the anode are released to impinge upon the cathode (12). The anode and ion source structure may be grounded, and ions are released through openings facing the cathode when a positive trigger pulse is applied to one or more electrodes extending within the plasma. The cathode is preferably operated at a voltage in the order of thirty to two hundred thousand volts negative with respect to the cathode. Leakage of ions from the hollow anode may be inhibited by the provision of a supplemental grid biased to a low positive potential.
    • 等离子体 - 阳极电子枪包括诸如钼的材料的阴极装置,其具有相对较高的二次电子发射比率与入射氦离子的比例。 空心环形阳极结构(16)包含电离等离子体,并且当来自阳极的离子被释放以撞击阴极(12)时,具有电子束(36)所引导的中心开口(38)。 阳极和离子源结构可以接地,并且当正触发脉冲施加到在等离子体内延伸的一个或多个电极时,离子通过面向阴极的开口释放。 阴极优选以相对于阴极为三十到二十万伏负的电压工作。 通过提供偏置于低正电位的补充电网,可以抑制来自中空阳极的离子的泄漏。
    • 10. 发明授权
    • Pollutant remediation system
    • 污染物补救制度
    • US5855855A
    • 1999-01-05
    • US866353
    • 1997-05-30
    • Weldon S. WilliamsonEun-Hee CirlinFrank A. DolezalRobin J. Harvey
    • Weldon S. WilliamsonEun-Hee CirlinFrank A. DolezalRobin J. Harvey
    • B01D53/72B01D53/32B01D53/50B01D53/56B01D53/74B01D53/92B01J19/08F01N3/08H01T19/00F01N3/00
    • F01N3/0892B01D53/32B01D53/92B01J19/088H01T19/00B01J2219/0849Y10S422/907
    • A pollutant destruction system connects a capacitive corona discharge chamber in a self-resonant circuit with an inductive element. Intermittent energizing signals are furnished from a power supply to induce corona discharges within the chamber, with the resonant circuit responding to the energizing signals by initiating additional corona discharges between energizing signals in a highly energy efficient operation. One or more discharge chambers can be provided in the resonant circuit, with each discharge chamber comprising a dielectric enclosure with a distributed electrode outside and an elongate electrode inside the enclosure. The inner electrode can extend either along the chamber axis, or along the inner chamber wall for better support and heat dissipation. The energizing pulse frequency can be controlled in various ways, such as in response to a termination of corona discharges, an increase in the pollutant concentration or an acceleration of an engine whose exhaust is being treated, or the pulses can be applied at a fixed rate.
    • 污染物破坏系统将自谐振电路中的电容电晕放电室与电感元件连接。 间歇通电信号由电源提供以在室内引起电晕放电,其中谐振电路响应于通电信号,通过在高能量效率的操作中在激励信号之间引发额外的电晕放电。 可以在谐振电路中提供一个或多个放电室,每个放电室包括具有分布电极外部的电介质外壳和外壳内的细长电极。 内部电极可以沿腔室轴线延伸,或者沿内腔壁延伸,以获得更好的支撑和散热。 励磁脉冲频率可以以各种方式进行控制,例如响应于电晕放电的终止,污染物浓度的增加或其排气被处理的发动机的加速度,或者可以以固定速率施加脉冲 。