Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

Jian Wang; Junping Duan; Xinxin Shen; Yongsheng Wang; Binzhen Zhang

doi:10.3390/mi15030335

Miniaturized Lens Antenna with Enhanced Gain and Dual-Focusing for Millimeter-Wave Radar System

Micromachines (Basel). 2024 Feb 28;15(3):335. doi: 10.3390/mi15030335.

Authors

Jian Wang¹, Junping Duan¹, Xinxin Shen¹, Yongsheng Wang¹, Binzhen Zhang¹

Affiliation

¹ State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China.

Abstract

This paper presents a waveguide Lens antenna at the W-band adopting dual-focusing Lens to improve the performance. The Lens antenna consisted of a waveguide slotted structure and lenses processed using NOA73 meet the demands of miniaturization for current communication systems. The antenna radome fabricated using NOA73 not only protects the antenna structure but also improves the gain of the antenna by about 9.5 dBi via electromagnetic wave dual-focusing. A prototype is fabricated using novel UV-LIGA technology. Measured results are compared with simulated values. Measured results confirmed the fabricated antenna operated in the W-band with a 10 dB fractional bandwidth (FBW) of 6.5% from 97.5 to 104 GHz and a peak gain of 22 dBi at 100 GHz in the direction perpendicular to the plane of the feed waveguide. A good agreement between simulation and measurement is obtained, demonstrating efficient radiations in the operating band.

Keywords: UV-LIGA technology; dual-focusing; gain enhancement; miniaturization; radome; waveguide antenna.

Grants and funding

This work was supported by The National Natural Science Foundation of China under Grant 52175555. Fund for the Innovation community under Grant 51821003. Sup-ported by Fundamental Research Program of Shanxi Province (No. 20210302123074). Foundation of State Key Laboratory of Dynamic Measurement Technology, North University of China, grant number 2023-SYSJJ-03.