A Metasurface‐Based Circularly Polarized Magneto‐Electric Dipole Antenna Arrays With Wide Bandwidth for Ku Band

ABSTRACT This letter proposes a novel broadband circularly polarized magnetoelectric dipole antenna array loaded with metasurfaces (MS). To further improve the gain and expand the axial‐ratio (AR) bandwidth, a beveled 4 × 4 MS structure was loaded on the top layer of the magnetoelectric dipole antenna element. Subsequently, a 4 × 4 antenna array was designed through sequential rotation (SR) technology. A prototype of the antenna array was fabricated and the design was verified. The test results show that within the operating frequency band, the impedance bandwidth of the device is 40% (12–18 GHz), and the gain bandwidth of 3 dB is 32.37% (12–16.64 GHz). The 3 dB AR bandwidth of 32.11% (12–16.59 GHz) and a peak gain of 18.5dBic were simultaneously recorded. Therefore, the antenna proposed in this letter demonstrates strong applicability to Ku‐band (12–18 GHz) communication.