A Broadband Tri-Polarization Reconfigurable Magneto-Electric Dipole Antenna

A broadband tri-polarization reconfigurable mag-neto-electric dipole antenna is presented in this paper. This proposed antenna structure mainly consists of a conventional ME antenna fed by a Γ-probe, four parasitic patches, a rectangular ground plane and four PIN diodes including their corresponding bias circuit. The size of the rectangular ground plane is of 250 ×180 mm
²
and its profile is of 50 mm. Each of the four PIN diodes is controlled by its corresponding bias circuit independently. The proposed antenna is capable of providing three different polarization states including one linear polarized operation mode and two orthogonal circular polarized modes. The simulated overlapped bandwidth (S
₁₁
≤-10 ) is about 59% (1.36 GHz~2.5 GHz) for the one linear polarized mode and 78.7% (1.07 GHz~2.46 GHz) for the two orthogonal CP modes. In additional, the simulated overlapped 3-dB AR bandwidth is about 37.2% from 1.2 GHz to 1.75GHz. Detailed design considerations of the proposed antenna are described in the following sections.