Collinear dipole antenna

Claim 1

A vertically polarizable antenna having a horizontal radiation pattern comprising a support mast, two dipoles insulatively mounted collinearly on said mast, coaxial feed means, first and second stripline means, said first stripline means comprising a ground plane extending from a point between and equidistant from each of said dipoles to and electrically connected with a first element of a first of said dipoles, said second stripline means comprising a ground plane and a conductor extending from said point to the other of said dipoles with said ground plane and said conductor connected to respective elements of said other dipole, said coaxial feed means running parallel with and spaced from said first stripline means whereby the outer conductor of said feed means cooperatively functions as part of said first stripline, said coaxial feed means terminating at said point, means interconnecting the center conductor of said feed means and said conductor of said second stripline means, means connecting said outer conductor with a second element of said first dipole, and means electrically connecting said ground plane of said first stripline means to said first element of said first dipole, whereby said two dipoles are energized in phase independent of frequency over a wide operating frequency range.