A Wideband Dual-Polarized Antenna for Millimeter-Wave Applications

A wideband dual-polarized magneto-electric (ME) dipole for millimeter waveband applications is presented. The ME dipole consists of four shorted patches, which are fed by two pairs of T-shaped probes orthogonally oriented on the same layer. The feed lines are connected with the T-shaped probes through metallic vias. Simulated overlapped impedance bandwidth of 50% with return loss larger than 10 dB, gain up to 9.4 dBi, and isolation higher than 17.8 dB between dual polarizations are achieved. By combining the antenna elements with single-layered feed networks, a 2 x 2 array is designed, fabricated, and measured. The overlapped working bandwidth is 50%, with gain up 14.8 dBi. With the advantages of wide bandwidth, single-layered radiation structure, and promising radiation pattern, the proposed antenna with dual polarizations would be attractive for millimeter-wave antenna in package (AiP) applications.