Compact two-port MIMO antenna dual-circularly polarized 28/38 GHz with polarization diversity for 5G and beyond millimeter-wave systems
This paper presents a compact dual-band circularly polarized two-port MIMO antenna for millimeter-wave applications at 28 and 38 GHz. The single-element antenna occupies an ultra-small area of 8 mm × 16 mm and is fabricated on a Rogers RO3003 substrate (εr = 3, thickness = 0.25 mm). Circular polarization is achieved at...