Dual-polarization slot antenna array with resonant cavities for small-cell base station applications

The article proposed a rectangle slot array with multi-resonant cavities for dual-polarization applications. The array with slots element coupled by the front side feeding network and the multi-resonant cavities has a compact size. The dual-polarization slot array is fabricated on the FR4 substrate of thickness of 0.8 mm and permittivity of 4.4. The multi-resonant cavity is made by 0.2 mm copper sheet, and the length and width of cavity are 35 mm; the height of the cavity is 10 mm. The design of planar structure and good radiation performance is suitable for applying small-cell base station (3.6–4 GHz).