A Novel Planar Dual CP MIMO Antenna With Polarization Diversity and High Isolation

In this paper, a low cost planar two-port circularly polarized MIMO patch antenna with the polarization diversity is presented. Three grounded stubs and a mirrored F defected ground slot are used to achieve simultaneous matching and isolation between the two patch and offset feeding for circular polarization. The proposed antenna covering 2.5-2.55 GHz is fabricated and measured. Its measured performance show that and axial ratio for the whole band. Its radiation patterns and gain are also measured and an agreement with the simulation result has been achieved.