Dual‐wideband dual‐polarised magnetoelectric dipole antenna for 4G/5G microcell base station

A novel dual‐wideband dual‐polarised magnetoelectric (ME) dipole antenna for the fourth generation (4G)/fifth generation (5G) microcell base station is proposed. Using a pair of orthogonal ME dipoles and Γ‐shaped tapered cross feeding lines, the initial antenna achieves dual‐band and dual‐polarised. Then, four U‐shaped gaps, added in electric dipoles, effectively extend the lower impedance bandwidth. Finally, a circular parasitic patch with capacitive properties is innovatively loaded above the ME antenna, which obviously reduces the high‐resonant frequency from 5.5 to 4.9 GHz. Meanwhile, a box‐shaped reflector is employed to achieve stable gain and radiation patterns. As a result, the measured results show the good dual‐wideband performance of 52.4% (2.14–3.66 GHz) and 7.4% (4.68–5.04 GHz) with voltage standing wave ratio (VSWR) < 2, high isolation (>25 dB) and high gain (9.5 and 5.5 dBi, respectively). In addition, a stable radiation pattern with a half‐power beam width of 63.5 ° ± 6.8 ° and good cross‐polarisation discrimination (>20 dB) on the E ‐plane is realised over these two bands.