A Hybrid Metamaterial-Based Wide-Angle Beam-Scanning Phased Array Antenna

A novel miniaturized, low-cost, wide-angle beam-scanning phased array antenna based on hybrid metama⁃ terial is proposed in this paper. By loading the metasurface on the dielectric resonator (DR), a novel hybrid metamaterial ra⁃ diator with a compact size of 0.39λ0 ´ 0.27λ0 ´ 0.09λ0 is implemented owing to the extra capacitive loading. Based on the miniaturization and periodicity of the metasurface, the array spacing is reduced to 0.40λ0. As a result, a wider beam-scan⁃ ning range is realized. Besides, the isolation between different elements is improved by loading the air vias on the DR and etching the T-shaped slots on the ground. Based on the hybrid metamaterial radiator, the compact array design method and the decoupling scheme, a miniaturized five-element linear array is fabricated and measured. The measured -10 dB imped⁃ ance bandwidth is 3.30~3.80 GHz (14.1%), the port isolation is greater than 13 dB, and the realized peak gain is 10.1 dBi. The main lobe can scan from -81° to 84°, and the 3 dB beam-width coverage range is [-111° 105°]. The proposed array has the advantages of compact size, broadband, low-cost, and wide-angle beam-scanning capability, which makes it suitable for intelligent, low-cost, and robust wireless communication applications. © 2023 Chinese Institute of Electronics. All rights reserved.