A Multifunctional Magneto-Electric Dipole Antenna with Pattern and Polarized Reconfigurability

This letter proposes a pattern- and polarized-reconfigurable magneto-electric dipole antenna. Based on the existing traditional magneto-electric dipole antenna, The PIN diodes are added to regulate the radiation structure of the antenna. By changing the trend of its surface current, four different radiation states are generated, which can achieve two types of circularly polarized radiation and two types of linearly polarized beam deflection radiation. They have the same operating frequency band covering (1.6 to 1.9) GHz (17%). For circularly polarized radiation states, the proposed antenna has a 3 dB axial ratio (AR) beamwidth ranging from -100 degrees to +100 degrees and high cross polarization. For beam deflection states, the proposed antenna provides the function of beam scanning from +/- 15 degrees to +/- 35 degrees by changing the operating frequency. In order to verify the reliability of the simulation, a prototype is made with 3-D printing technology. The experimental results are in good agreement with the simulation results, proving that the antenna has good performance.