Eccentric Dual-Mode Wideband Magnetic Dipole Antenna with Broadened Beamwidth

A novel eccentric circular sector dual-mode resonant magnetic dipole antenna with broadened beamwidth is presented. At first, it is found that the eccentric distance of d can be employed to yield broadened half-power beamwidth in the azimuth plane. Then, a pair of tuning slits has been cut to achieve multi-mode resonant radiation characteristic. Finally, a prototype is designed on air substrate at 2.4 GHz-band to validate the effect of eccentric distance. The results show that the broadened beamwidth phenomenon in azimuth plane, the HPBW can be effectively broadened from 190° to 205° at 2.58 GHz by the eccentric distance.