A dual-polarized wideband substrate-integrated-waveguide-fed slot antenna array for 60 GHz

A dual-polarized wideband substrate-integrated-waveguide fed aperture-coupled slot antenna array for 60 GHz is proposed. By cutting a semicircle shape on the edge of the crossed-slot antenna, the impedance bandwidth of the proposed antenna is effectively widen and achieves overlapped bandwidth of 16.7% for simulated |S11| and |S22|. In addition, over 35 dB isolation between two polarization and low cross-polarization level are achieved for dual-polarization operations. A gain up to 11.4 dB is obtained for 2×2 array. Most importantly, the proposed antenna array uses the aperture coupling method to enable the connection between PCB layers. It could be fabricated by stacking three layers of standard printed circuit board (PCB) laminates. With the advantages of low-cost, convenience of fabrication and desired performances, the proposed antenna is suitable for the millimeterwave antenna applications.