Three-dimensional H-fractal bandgap materials and antennas
    43.
    发明申请
    Three-dimensional H-fractal bandgap materials and antennas 失效
    三维H分形带隙材料和天线

    公开(公告)号:US20070236406A1

    公开(公告)日:2007-10-11

    申请号:US11398474

    申请日:2006-04-05

    IPC分类号: H01Q15/02 H01Q1/38

    摘要: A three dimensional (3D) fractal structure with H as the mother element is hereby disclosed. Such a 3D structure can act as selective total microwave reflectors or selective microwave filters in transmission. When excited through current injection, such a 3D fractal structure can act as highly efficient antenna for radiating or detecting pre-determined microwaves, with the relevant wavelength much larger than the size of the radiation or detection structure.

    摘要翻译: 因此公开了具有H作为母体元素的三维(3D)分形结构。 这种3D结构可以用作传输中的选择性全微波反射器或选择性微波滤波器。 当通过电流注入激发时,这种3D分形结构可以用作高效天线,用于辐射或检测预定的微波,相关波长远大于辐射或检测结构的大小。

    Recording a phase hologram having reduced intermodulation distortion
    46.
    发明授权
    Recording a phase hologram having reduced intermodulation distortion 失效
    记录具有降低的互调失真的相位全息图

    公开(公告)号:US4054358A

    公开(公告)日:1977-10-18

    申请号:US684238

    申请日:1976-05-07

    IPC分类号: G03H1/00 G03H1/04

    CPC分类号: G03H1/00 Y10S359/90

    摘要: A moveable mask with a pin hole therethrough is disposed between a source of an object beam and a holographic recording medium. The pin hole limits the angular range of rays of the object beam transmitted to the medium, thereby preventing intermodulation distortion caused by rays of the object beam that have large angles therebetween. The mask may be moved to cause all of the rays of the object beam to pass through the pin hole, whereby a hologram is recorded.

    摘要翻译: 具有针孔的可移动掩模设置在物体光源和全息记录介质之间。 针孔限制了传递到介质的物体光束的射线的角度范围,从而防止由它们之间具有大角度的物体光束引起的互调失真。 可以移动掩模以使物体光束的所有光线穿过针孔,从而记录全息图。