Decoupling stub-loaded parallel dipole array with orthogonal polarization

Abstract

This paper presents a novel design for a two-element stub-loaded dipole array antenna. The purpose is to obtain the decoupling and orthogonal polarization characteristics using a small antenna configuration. A quarter-wavelength stub loaded on one side of the two elements is operated as a phase shifter to create the opposite phase of current distribution. Moreover, the quarter-wavelength stub works as an orthogonal dipole antenna because the in-phase currents are enhanced on the stub, leading to orthogonal directivity. The results show that well-defined isolation and orthogonal polarization directivity can be achieved using the proposed antenna.