Magneto-electric dipole antenna array for 77 GHz automotive radar

IF 1.1 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Microwaves Antennas & Propagation Pub Date : 2023-12-22 DOI:10.1049/mia2.12445

Dinuo Bu, Shi-Wei Qu

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Abstract

A 1 × 4 magneto-electric dipole (ME dipole) antenna array for 77 GHz automotive radar is proposed. The ME dipole is fed by a fork-shaped microstrip line coupling through a dog-bone slot. To meet the requirements aimed at automotive radar applications, the beamwidths of the proposed antenna are well-designed. Specially, a method of adding passive elements on both sides of the array is proposed to increase the 3 dB beamwidth from ±34° to ±52° in azimuth. Additionally, in elevation, a 3 dB beamwidth of ±10° is achieved by designing the spacing between array elements. Moreover, based on low-loss printed circuit board substrates, radiation efficiency of the proposed array can reach approximately 90% at 77 GHz. Furthermore, a 4 × 4 array is established by arranging four 1 × 4 subarrays spacing 1.95 mm (half a free-space wavelength at 77 GHz) to study the interactions between subarrays for multiple input multiple output scenarios. A 1 × 4 and a 4 × 4 antenna prototypes are fabricated and measured to validate the correctness of this design. The results show that the proposed antenna is an eligible candidate for the medium- and short-range automotive radars.

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用于 77 千兆赫汽车雷达的磁电偶极子天线阵列

本文提出了一种用于 77 GHz 汽车雷达的 1 × 4 磁电偶极子（ME 偶极子）天线阵列。ME 偶极子由一条通过狗骨槽耦合的叉形微带线馈电。为满足汽车雷达应用的要求，对所提天线的波束宽度进行了精心设计。特别是提出了一种在阵列两侧添加无源元件的方法，可将方位角的 3 dB 波束宽度从 ±34° 增加到 ±52°。此外，在仰角，通过设计阵列元件之间的间距，实现了 ±10° 的 3 dB 波束宽度。此外，基于低损耗的印刷电路板基板，拟议阵列在 77 GHz 频率下的辐射效率可达到约 90%。此外，通过排列四个间距为 1.95 毫米（77 千兆赫自由空间波长的一半）的 1 × 4 子阵列，建立了 4 × 4 阵列，以研究多输入多输出情况下子阵列之间的相互作用。制作并测量了 1 × 4 和 4 × 4 天线原型，以验证该设计的正确性。结果表明，所提出的天线是中程和短程汽车雷达的理想候选天线。

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来源期刊

Iet Microwaves Antennas & Propagation 工程技术-电信学

CiteScore

4.30

自引率

5.90%

发文量

109

审稿时长

7 months

期刊介绍： Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf