Design of Compact Dual-Polarized Antennas for MIMO Handsets

A design method of compact dual-polarized antennas has been proposed for Multiple Input and Multiple Output (MIMO) handset application. For the sake of high isolation in dual polarizations, a printed monopole and a hybrid slot antenna are combined using a CoPlanar Waveguide (CPW) and microstrip hybrid feeding structure. The proposed topology will result in orthogonal current distribution modes for the different polarizations, which effectively reduces the mutual coupling of the two modes. The operation mechanism of the feeding structure is analyzed in principle and verified by simulation.