Antenna apparatus having cross-shaped slot

Abstract

A primary object of the present invention is to provide a small and highly efficient antenna apparatus having a polarization diversity function with a plurality of antenna elements. A secondary object of the present invention is to provide an antenna apparatus having a broadband property. By feeding power to two radiation area 5b perpendicular to each other of a cross-shaped slot 4 formed on a conductive plate 3, polarization diversity is performed. By forming a plurality of such cross-shaped slots 4 in one line on one conductive plate 3a, attaching a crossing area potential-relaxing conductive part 5a on the backside of a crossing 4a of each slot 4 on the dielectric substrate 3a and attaching a radiation area potential-relaxing conductive parts 5b on the backside of a radiation area 4b of each slot 4, a small and highly efficient antenna apparatus can be obtained. Also by providing an electric characteristics adjusting plate 17 on one face of the dielectric, an antenna apparatus having a broadband property can be obtained.

Dependencies are inferred from the claim text.