Broadband and Wide Beam Magneto-electric Dipole Antenna Design

In order to broaden the antenna beamwidth, a broadband and wide beam Magneto-Electric (ME) dipole antenna with low polarization is designed based on the conventional ME antenna. By tilting and bending the dipoles, the beam width of the antenna is broadened; the consistency of the radiation pattern is improved by placing 6 parasitic patches symmetrically around the ground center. Optimizing the space between the dipoles and the length of the dipole based on the-shaped feed structure, a relative bandwidth of 58.5% (S11-10 dB) from 2.3~4.2 GHz is achieved. By optimizing the tilting angle and the parameters of the parasitic dipole, the Half Power Beam Width (HPBW) of E-plane and H-plane is simultaneously broadened to 120 in the frequency range from 2.4~4.0 GHz. The measurement results are in good agreement with the corresponding simulation, which not only prove that the broadband and wide beam characteristics of the designed antenna, but also extremely improve the consistency of the radiation pattern through the whole frequency band.