Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
Fan-Yi Meng
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China; Zunshen Starlink Technology Co, Foshan, China; Corresponding author.
Chang Ding
Air Force Engineering University, Xi'an, China; Corresponding author.
Jian-Feng Lv
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China; AVIC Lei hua Electronic Technology Institute, Wu Xi, China
Lei He
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
Jian-Qiao Han
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
Cong Wang
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
Kuang Zhang
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
Shanshan Xu
Emergency Department, Harbin First Hospital, Harbin, China; Corresponding author.
Qun Wu
Department of Microwave Engineering, Harbin Institute of Technology, Harbin, China
In this work, a low-cost all-metal metamaterial near-field lens based on laser cutting technology is proposed. A novel spiral-slot structure is proposed to achieve miniaturized unit cells with an adjustable 360-degree phase shift at a length smaller than 0.2 times the operating wavelength. Since the unit is entirely constructed of stainless steel, it is resistant to high temperatures and high pressures compared to existing results. Moreover, a four-layer structure is used to increase the transmission coefficient. The final L-band near-field lens is constructed of 20 × 20 units. Simulation and measured results show that the half-power beamwidth of the focus is less than 211 mm from 1.52 GHz to 1.68 GHz at the focal spot observation plane of 500 mm from the lens. Since numerically controlled machine tools and three-dimensional printing are prohibitively expensive for machining large metal components, a low-cost all-metallic lens was manufactured using laser cutting technology. The measured results are in agreement with the simulation results.
