Zarifi Davood, Saber Ali Sabbaghi, Zaman Ashraf Uz
School of Electrical and Computer Engineering, University of Kashan, Kashan, Iran.
Department of Microwave and Antenna Engineering, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology, Gdańsk, 80-233, Poland.
Sci Rep. 2024 Dec 28;14(1):31458. doi: 10.1038/s41598-024-83283-w.
This study presents the design of a high-gain 16 × 16-slot antenna array with a low sidelobe level (SLL) using a tapered ridge gap waveguide feeding network for Ka-band applications. The proposed antenna element includes four cavity-backed slot antennas. A tapered feeding network is designed and utilized for unequal feeding of the radiating elements. Ridge gap waveguide technology is used to reduce the feeding network loss and achieve a low-loss array antenna. The feed layer of the proposed antenna is coupled to a standard rectangular waveguide (WR-28) using a proper transition. The measured results show an impedance bandwidth of more than 17% over the frequency range of 27.5-32.6 GHz covering one of the standard vehicle-to-satellite band (29.4-31.0 GHz) and 5G mmWave N261 band (27.5-28.35 GHz), a maximum gain of 28.9 dBi, and SLL lower than - 20 dB. Thanks to its high performance and desirable features, the proposed antenna shows potential for use in vehicular radar systems and high data rate mmWave communications.
本研究提出了一种用于Ka波段应用的高增益16×16缝隙天线阵列的设计，该阵列采用渐变脊形缝隙波导馈电网络，具有低旁瓣电平（SLL）。所提出的天线单元包括四个背腔缝隙天线。设计并利用渐变馈电网络对辐射单元进行不等分馈电。采用脊形缝隙波导技术降低馈电网络损耗，实现低损耗阵列天线。所提出天线的馈电层通过适当的过渡与标准矩形波导（WR-28）耦合。测量结果表明，在27.5 - 32.6 GHz频率范围内，阻抗带宽超过17%，覆盖了标准车对卫星频段之一（29.4 - 31.0 GHz）和5G毫米波N261频段（27.5 - 28.35 GHz），最大增益为28.9 dBi，旁瓣电平低于 - 20 dB。由于其高性能和理想特性，所提出的天线在车载雷达系统和高数据速率毫米波通信中显示出应用潜力。
