×

Antenna with curved dipole elements

  • US 5,173,715 A
  • Filed: 06/12/1991
  • Issued: 12/22/1992
  • Est. Priority Date: 12/04/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. An antenna comprising:

  • a base plate member defining a ground plane element;

    mast means for conducting electrical feed current, said mast means being attached to the base plate member and extending along an axis that is normal to the ground plane element;

    means for conducting electrical feed current to said mast means;

    a first pair of antenna elements defining a dipole, each of said antenna elements being a single substantially flat conductive strip formed on one surface only of a first thin flexible portion of dielectric material thereby to define a conductive printed circuit on said one surface of said first portion of dielectric material and being conductively coupled to the mast means at a first end, each of said first ends and said first thin flexible portion of dielectric material being supported by the mast means at a first location space apart from the ground plane element by a predetermined distance, and each of said antenna elements having a second end substantially closer to the ground plane element than to said first end, no portion of said ground plane element being closer to said first location than said predetermined distance;

    each of the printed circuit antenna elements together with said first thin flexible portion of dielectric material exhibiting a smooth and continuous first curvature throughout its length in a plane containing the mast means;

    a first pair of conductive tabs each electrically connected to said ground plane element, one of said first pair of conductive tabs being connected to said first thin flexible portion of dielectric material in closely spaced-apart relation to said second end of one of said first pair of antenna elements and the other of said first pair of conductive tabs being connected to said first thin flexible portion of dielectric material in closely spaced apart relation to said second end of the other of said first pair of antenna elements;

    a second pair of antenna elements defining a dipole, each of said second pair of antenna elements being a single substantially flat conductive strip formed on one surface only of a second thin flexible portion of dielectric material thereby to define a conductive printed circuit on said one surface of said second portion of dielectric material and being conductively coupled to the mast means at a first end, said first end of each of said second pair of antenna elements and said second thin flexible portion of dielectric material being supported by the mast means adjacent to the first location, each of said antenna elements of said second pair having a second end substantially closer to the ground plane element than to said first end;

    each of the printed circuit antenna elements of the second pair together with said second thin flexible portion of dielectric material exhibiting a smooth and continuous second curvature in a plane that contains the mast means; and

    a second pair of conductive tabs each electrically connected to said ground plane element, one of said second pair of conductive tabs being connected to said second thin flexible portion of dielectric material in closely spaced-apart relation to said second end of one of said second pair of antenna elements and the other of said second pair of conductive tabs being connected to said second thin flexible portion of dielectric material in closely spaced-apart relation to said second end of the other of said second pair of antenna elements.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×