Low-Profile Circular Patch Array Fed by Slotted Substrate Integrated Waveguide
Low-Profile Circular Patch Array Fed by Slotted Substrate Integrated Waveguide
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DOI：
10.1109/tap.2018.2882618
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发表时间：
2019-02
影响因子：
5.7
通讯作者：
Junfeng Xu;W. Hong;Z. Jiang;Hui Zhang
中科院分区：
文献类型：
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作者：
Junfeng Xu;W. Hong;Z. Jiang;Hui Zhang
提出了一种由缝隙基片集成波导馈电的圆形贴片组成的线阵天线。开槽圆形贴片工作在准TM21模式下，由于在圆形贴片的中间空间引入额外的缝隙载荷，从而产生具有改进增益的孔径辐射。给出了所提出的$1×8$线阵天线与其他两种用于汽车雷达的传统线阵天线的比较，突出了所提出的线阵天线具有更高的增益和更宽的1dB增益带宽的优越性能。对影响阵列天线性能的几个关键几何设计参数进行了研究和分析，以便更好地理解所提出的阵列天线。进一步设计了包含四个$1\x 8$线阵的$4\×8$平面阵列天线，以验证所提出的线阵的扩展能力。制作了线阵和平面阵天线并进行了测试，仿真结果与测试结果吻合较好，从而验证了设计的正确性。所提出的阵列天线可以很好地应用于毫米波汽车雷达。
A linear array antenna comprising circular-shaped patches fed by slotted substrate integrated waveguide is proposed. The slotted circular-shaped patch operates at the quasi-TM21 mode, which produces boresight radiation with an improved gain due to the introduction of additional slot loadings in the middle space of the circular-shaped patch. Comparisons among the proposed $1 \times 8$ linear array antenna and two other traditional linear arrays used in automotive radars are presented, highlighting the superior performance of the proposed linear array, i.e., higher gain and wider 1 dB gain bandwidth. Several key geometrical design parameters, which are critical to the performance of the array antenna, are studied and analyzed to provide a better understanding of the proposed array antenna. A $4\times 8$ planar array antenna incorporating four $1\times 8$ linear arrays is further designed to verify the extension capability of the proposed linear array. Both the linear array and the planar array antennas were fabricated and measured, showing a good agreement between simulation and measured results, thus validating the designs. The proposed array antenna can be a good candidate for millimeter-wave automotive radar applications.