An All-Metal Slotted Waveguide Antenna for 79 GHz Automotive Radar Applications

IF 1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Microwave and Optical Technology Letters Pub Date : 2025-04-06 DOI:10.1002/mop.70183

Jinghu Sun, Leyao Wu, Xinwei Chen, Ronglin Li, Xiuyin Zhang, Yuehui Cui

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Abstract

An all-metal slotted waveguide antenna is proposed for 79 GHz millimeter-wave automotive radar applications. The slotted waveguide antenna consists of a jagged rectangular waveguide cavity with four rectangular slots which forms a linear array. A TE $_{140}$ mode is excited in the rectangular cavity by a rectangular waveguide feed at the bottom center of the cavity. Four radiating slots are introduced above the jagged cavity to enhance the radiation of the slotted cavity, thus improving the impedance matching and increasing the antenna gain. Simulation and measurement results show that the all-metal slotted waveguide antenna achieves a peak gain of 14 dBi with a fan-beam radiation pattern and an impedance bandwidth of 7%, covering the 79 GHz band (76–81 GHz) for global automotive radar sensors. A two-transmit/two-receive (2-TX/2-RX) antenna module is investigated. The isolations between TX antennas and between RX antennas are higher than 30 dB. A 6-TX/8-RX antenna module is developed to demonstrate the potential for commercial automotive radar sensors. Stable radiation patterns and antenna gains are obtained for all of the TX/RX antennas, suitable for automotive radar applications.

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来源期刊

Microwave and Optical Technology Letters 工程技术-工程：电子与电气

CiteScore

3.40

自引率

20.00%

发文量

371

审稿时长

4.3 months

期刊介绍： Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication