Structure
    13.
    发明授权
    Structure 失效
    结构体

    公开(公告)号:US06832455B1

    公开(公告)日:2004-12-21

    申请号:US10030955

    申请日:2002-01-07

    IPC分类号: E04B100

    摘要: A method for fabricating a space frame structure, such as a dome, for covering an open space, with the space frame structure being assembled from beam members, which intersect at rigid mode joints. The beam members and other structural components used in the skeleton of the space frame are made from pre-cast concrete, which has not been subjected to pre-tensioning and the rigid node joints are formed in situ, for example, by casting concrete joints incorporating the ends of the beam members. The loads imposed by the weight of the beam members on the beams and the node joints effectively simulate pre-stressing of the components which act within the assembled structure as pre-stressed concrete.

    摘要翻译: 一种用于制造用于覆盖开放空间的空间框架结构的空间框架结构的方法,其中空间框架结构由在刚性模式接头处相交的梁构件组装。 用于空间框架骨架的梁构件和其他结构部件由预制混凝土制成,预混合物未经受预张紧,刚性节点接头在原地形成,例如通过浇注混凝土接头 梁构件的端部。 通过梁构件在梁和节点接头上的重量施加的载荷有效地模拟作为预应力混凝土在组装结构内作用的部件的预应力。

    Microstrip antenna
    15.
    发明授权
    Microstrip antenna 失效
    微带天线

    公开(公告)号:US4761653A

    公开(公告)日:1988-08-02

    申请号:US33212

    申请日:1987-04-02

    IPC分类号: H01Q21/06 H01Q25/00 H01Q1/38

    CPC分类号: H01Q25/001 H01Q21/065

    摘要: A microstrip antenna is formed of a 3.times.2 group of elements, with adjacent H-feeds. The outer pairs of elements are responsive to opposite senses of polarisation respectively and the inner pair of elements is responsive to both sense of polarisation. The appropriate phase for the respective element orientations are obtained by making S=r+.lambda./4 and q=p+.lambda./2 where .lambda. is the wavelength of radiation. The element spacing lies between 0.5.lambda. and 1.0.lambda., typically 0.85.lambda..Larger arrays are formed both by increasing the number of pairs of elements responsive to both senses of polarisation, but leaving the two outer pairs responsive only to respective opposite senses of polarisation, and by increasing the number of rows of pairs.

    摘要翻译: 微带天线由3×2组的元件形成,具有相邻的H馈源。 外部元件对分别对相反的极化感应进行响应,并且内部对元件对两极化方向都有反应。 通过使S = r +λ/ 4和q = p +λ/ 2得到各元素取向的适当相位,其中λ是辐射波长。 元件间距在0.5λ和1.0λ之间,通常为0.85λ。 通过增加响应于两极化偏振的元件对的数量而形成更大的阵列,但是使两个外部对仅仅响应于相应的相反的偏振感,并且通过增加对的行数来形成。