NOVELTY - The antenna has dipole arm base (90A) which is received by a ground plane (80). The dipole arm base is provided to support dipole arm (20) fed by dipole arm feeds (30,40). The dipole arm base is dimensioned to provide less than quarter wavelength separation between ground plane and dipole arm. The aperture (100) of the dipole arm base is provided with quarter wavelength effective electrical length between ground plane and dipole arm feed. The apertures are defined by slots extended into dipole arm base.
USE - Wideband antenna used in cellular base station antenna panels.
ADVANTAGE - The quarter-wave height of the antenna provides optimized antenna gain and antenna matching performance. The height of the antenna can be reduced by providing slots to increase the effective electrical length. The use of slits in the dipole arm base establishes the effective quarter-wave electrical length and optimizes matching performance. The slots provide a convenient shape, so that apertures can easily be incorporated into the dipole arm base during manufacture. The dipole base for the complete antenna can be assembled from individual dipole arm bases with apertures, such that the manufacture of the dipole base with internal apertures is simplified. The space occupied by the wideband antennas is reduced in order to reduce the overall size of antenna arrays for weight, structural loading and optical minimization reasons. The dipole with predetermined effective electrical length limits the minimum size footprint that the antennas occupy.
DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for assembling wideband antenna.
DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the wideband antenna.
Dipole arm (20)
Dipole arm feeds (30,40)
Ground plane (80)
Dipole arm base (90A)
Aperture (100)
