Periodic Asymmetric Trapezoidal Perturbation Microstrip Antenna for Millimeter-Wave Automotive Radar Sensors

被引：14
作者：
Yi, Hao [1 ]
Wang, Zhiding [1 ,2 ]
Xia, Dexiao [1 ]
Liu, Haixia [1 ]
Li, Long [1 ]
机构：
[1] Xidian Univ, Sch Elect Engn, Key Lab High Speed Circuit Design & EMC, Minist Educ, Xian 710071, Peoples R China
[2] Nanjing Elect Devices Inst, Nanjing 210016, Peoples R China
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2023年 / 71卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Automotive radar; broadband antenna; multiple-input-multiple-output (MIMO) radar antenna array; surface wave suppression; wide beam antenna; ARRAY ANTENNA; SIGNAL; LAYER;
D O I：
10.1109/TAP.2022.3227795
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This article presents a new design and experimental verification of a broadband wide-beam microstrip array antenna for short-range automotive radar sensors. The antenna is designed based on a pure microstrip transmission line, by inserting short inverted trapezoidal stubs alternately on both sides of the microstrip line periodically to generate a trapezoid-cascaded electric field, which enables the proposed antenna to radiate effectively. Therefore, the proposed antenna has the advantage of a simple structure. The antenna has a larger effective radiation aperture, which leads to a smaller quality factor, so the antenna has a broad bandwidth of 13% (74.02-85.08 GHz), completely covering 76-81 GHz automotive radar frequency band. The peak gain is up to 10.4 dBi. Based on the proposed antenna, a three transmitting antennas and four receiving antennas (3T4R) multiple-input-multiple-output (MIMO) radar antenna array is designed. To reduce the influence of strong surface waves on the radiation pattern, a design conception of a dummy array with an absorbing load is introduced. The array antenna of each transmitting (TX)/receiving (RX) channel can achieve a wide half-power beamwidth (HPBW) of 120?degrees in the azimuth plane. Besides, the MIMO array exhibits good consistency, with the absolute amplitude error of TX-RX channels less than 3 dB and the phase error less than 20 degrees in the azimuth plane.
引用
收藏
页码：1369 / 1377
页数：9
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