Described is an R045 ultra wideband antenna, which not only complies with the band width used in ultra wideband communications as established by the Federal Communication Commission of the United States (3.4 GHz - 10.6 GHz), but also is a site that simultaneously presents highly stable omnidirectional radiation patterns and a phase linearity. The RD45 ultra wideband antenna is cost effective and easily built. The present antenna comprises two pieces: an antenna including an electrically conductive radiant element and a ground planar, which comprises a grounded electrically conductive element.
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