Dual-Polarized Super-Wideband Antenna with Artificial Materials-Enhanced Gain for 5G Millimeter-Wave and Remote Sensing Applications

Abstract

This paper presents a high-performance dual-polarized super-wideband (SWB) antenna that employs optimized slots and an Artificial Material (AM) array to achieve remarkable enhancements in both bandwidth and gain. The proposed design features a compact Vivaldi configuration with integrated arrow-shaped slots, enabling SWB operation while maintaining a low-profile size of 0.66× 0.49× 0.01λ3. A constrained trust-region gradient-based optimization is used to refine the slot geometry and antenna parameters, achieving an operating range from 8.4 to 42.8 GHz with a stable gain of approximately 10 dBi at frequencies above 17 GHz. The incorporation of AMs further enhances the gain and extends the bandwidth. The AM antenna, with dimensions of 0.94× 0.49× 0.01λ3 , achieves peak gains of 13.3 dBi at 24 and 38 GHz and covers a wide operating range of 8.3-45 GHz. Dual polarization is realized by employing two orthogonally oriented Vivaldi elements, resulting in a high polarization isolation exceeding 25 dB across the entire operating bandwidth. The experimental results demonstrate excellent agreement with the simulation-based findings. Featuring SWB performance, high gain, strong polarization isolation, polarization diversity, and a compact low-profile structure, the proposed antenna is well suited for 5G millimeter-wave (MMW) and satellite remote sensing applications.