No abstract

This paper demonstrates a broadband dual-polarized metasurface antenna with high isolation and low cross-polarization using characteristic mode analysis. A wideband metasurface with stable radiation pattern is presented by splitting the edge patches into 2 Â 2 sub-array and introducing Minkowski fractal structure in the corner patches. To achieve the dual-polarized operation, a pair of degenerate modes of the metasurface are selected, and thus high isolation and low cross-polarization are obtained. The metasurface is excited by two slot antennas placed orthogonally. A prototype with an overall size of 1.46 λ 0 Â 1.46 λ 0 Â 0.07 λ 0 (λ 0 is the free-space wavelength at center frequency) is fabricated. The proposed antenna could achieve dual-polarization operation. The experiment results show that the À10 dB impedance bandwidths for each port are 28.9% (4.74-6.34 GHz) and 31.4% (4.62-6.34 GHz), respectively. The isolation between the two ports is higher than 31.8 dB, and cross-polarization level is better than À28 dB. Moreover, broadside radiation performances for two ports are obtained.

No abstract

A low‐profile dual‐band metasurface antenna is demonstrated for 4G LTE and 5G Sub‐6GHz applications. Based on the characteristic mode analysis, a wideband metasurface with stable radiation pattern is proposed by introducing Minkowski fractal structure in the edge patches and scaling the corner patches. The metasurface is operating in Sub‐6GHz band and excited by a Vivaldi bowtie slot antenna, which also serves as the radiator in LTE band. To validate the concept, a prototype with an overall size of 1.05λ0 × 1.05λ0 × 0.045λ0 (λ0 is the free‐space wavelength at 2.3 GHz) is fabricated. The experiment results show that the −10 dB impedance bandwidths in two bands are 1.7–2.78 (48.2%) and 3.2–5.01 GHz (44.1%), respectively. Moreover, broadside radiation performances in two bands are obtained.