Octave-band aperture-stakced microstrip antenna element for wideband antenna arrays

An octave-band aperture-stacked antenna element has been presented. The designed antenna element utilizes two stacked rectangular patches which are excited by aperture coupling with the use of dual-feeding technique along with appropriate matching network. The designed feeding network allows for achieving additional resonance at the lower frequency band, and therefore, the antenna element operates within one frequency octave with improved both flatness of directivity and radiation patterns comparing to the previously described design. The proposed approach has been verified by measurements of the designed antenna element operating in 1.75-3.5 GHz frequency range.