A Wideband and High-Gain Magneto-Electric Dipole Antenna

A novel wideband high-gain Magneto-Electric dipole antenna is presented. The proposed Magneto-Electric antenna is composed of a fishtail-shaped electric dipole, a half-circular loop antenna that works as a magnetic dipole, a microstrip-to-coplanar stripline transition balun, a box-shaped reflector and the loading of T-shaped array of metamaterial elements on the dielectric substrate. A high gain can be realized by loading of T-shaped array of metamaterial elements and using a rectangular box-shaped reflector. Simulated results show that this antenna has a wide impedance bandwidth of 58.5%, ranging from 2.32 GHz to 4.24 GHz and a high gain about 8 dB. Moreover, radiation patterns with low back radiation, fixing broadside direction mainbeam, symmetrical E-and H-plane patterns and large front-to-back ratio are obtained over the whole operating band by using a rectangular box-shaped reflector. The good performances make the antenna suitable for the wireless communication systems.