Wideband Dual-Polarized ME Dipoles-Fed Quasi- Spherical Lens Antenna for Millimeter-Wave Multibeam Applications

This paper presents a broadband modified spherical lens antenna with multiple radiation patterns for low-cost millimeter-wave (mm-Wave) communications. A dual polarization magnetoelectric dipole (DPME) antenna with a microstrip feeding structure is first designed. Then, a multiport feed structure consisting of six proposed feed elements is developed and works as the primary feed of the lens. With this arrangement, a set of the deviated beams are obtained with the space and polarization diversities. As a demonstration, a prototype of the proposed ME dipole-fed quasi-spherical lens antenna operated within the frequency range of 27-37 GHz is fabricated. The measured overlapped impedance bandwidth is wider than 30%. And the measured peak gains are about 18 dBi at different beams.