Patents Represented by Law Firm Antonelli, Terry 6 Wands
  • Patent number: 4431998
    Abstract: An antenna configuration capable of providing either shaped conical or uniform hemispheric coverage to circularly polarized signals from a very thin or flush mounted radiation structure. For this purpose, the antenna is configured of an array of (N=three or more) radiation elements fed in phase rotation (i.e. 360.degree./N phase difference between elements) to provide circular polarization. These elements may be short asymmetrically top loaded stubs, unbalanced slots, "L" type stubs, "U" shaped slots or other types of unbalanced elements which provide null free coverage in a hemisphere. The shape of these elements and their position in the array control the desired shaping of the antenna pattern.The antenna elements are provided on a first printed circuit board that is spaced apart by a thin dielectric spacer from an impedance matching/phasing network such as from 90.degree. and 180.degree. hybrid networks formed on a second printed circuit board.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: February 14, 1984
    Assignee: Harris Corporation
    Inventor: Kenneth R. Finken