Access and security control system and method
    1.
    发明授权
    Access and security control system and method 有权
    访问和安全控制系统及方法

    公开(公告)号:US07568108B2

    公开(公告)日:2009-07-28

    申请号:US11068142

    申请日:2005-02-28

    CPC classification number: G07C9/00134 H04L63/105 H04L63/107

    Abstract: A system and method for automatically regulating access control levels in an access control system based on prevailing security levels including homeland security levels, local environment situations such as crowds, rioting, looting, severe weather and temporal states such as workdays, weekends, holidays, and open houses.

    Abstract translation: 一种基于当前的安全级别,包括国土安全级别,当地环境情况(如人群,暴动,抢劫,恶劣天气和时间状态,如工作日,周末,假期等)自动调整访问控制系统中的访问控制级别的系统和方法。 开放的房子。

    Thin broadband microstrip array antenna having active and parasitic
patches
    4.
    发明授权
    Thin broadband microstrip array antenna having active and parasitic patches 失效
    薄型宽带微带阵列天线,具有有源和寄生贴片

    公开(公告)号:US5576718A

    公开(公告)日:1996-11-19

    申请号:US596929

    申请日:1996-02-05

    CPC classification number: H01Q21/065 H01Q19/005

    Abstract: An array antenna embodying on a dielectric support, a periodic succession parallel to an alignment direction of rectangular patches having alternating active patches and parasitic patches. The active patches are identical, fed with electromagnetic energy in areas such that their sides parallel to the alignment direction are radiating sides, sized to have the same resonant frequency and disposed so that their phase centers are at a distance apart less than the wavelength in air associated with the resonant frequency. The parasitic patches are separated from the active patches by slots of constant non-null width extending transversely to the alignment direction and sized to have resonant frequencies near the resonant frequency of the active patches.

    Abstract translation: 一种体现在电介质载体上的阵列天线,平行于具有交替的有源贴片和寄生贴片的矩形贴片的取向方向的周期性连续。 有源贴片是相同的,在电磁能量被馈送的区域中使得它们的平行于对准方向的边是辐射侧,其尺寸被设计成具有相同的谐振频率并且被设置成使得它们的相位中心距离空气中的波长小 与谐振频率相关。 寄生片与有源贴片通过横向于对准方向延伸的恒定非零宽度的槽分开,并且大小使谐振频率接近有源贴片的谐振频率。

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