首页>
外国专利>
Log-periodic longitudinal slot antenna array excited by a waveguide with a conductive ridge
Log-periodic longitudinal slot antenna array excited by a waveguide with a conductive ridge
展开▼
机译：由具有导电脊的波导激发的对数周期纵向缝隙天线阵列
展开▼
页面导航
摘要
著录项
相似文献
摘要
A log-periodic longitudinal slot antenna array comprises a dimensionally linearly tapered ridged waveguide having top and bottom walls, either forming part of a metallic ground plane and in which longitudinally elongated and spaced slots are formed. The long axis of each slot is parallel to the longitudinal component of the magnetic field in the waveguide and the slots have dimensions and inter-slot spacings which decrease in increments of a predetermined ratio &tgr; in a direction toward the smaller end of the tapered waveguide. The antenna produces a fan-shaped beam with its narrow radiation pattern lying in the E-plane of the waveguide when fed at either the large or small end of the waveguide or both, the boresight axes of the resultant independent beams being different for the two feed points. For bi- directional radiation, a similar array of slots is formed in both the top and bottom walls of the waveguide either or both of which optionally may comprise extended ground planes.
展开▼
