Shi Jin, Xu Ranhao, Wu Bowen, Wang Lei, Jiang Ruirui
School of Information Science and Technology, Nantong University, Nantong 226019, China.
Research Center for Intelligent Information Technology, Nantong University, Nantong 226019, China.
Micromachines (Basel). 2024 Aug 10;15(8):1022. doi: 10.3390/mi15081022.
A wideband dual-beam dielectric resonator antenna (DRA) with substrate integration capability was proposed for millimeter-wave (mm-wave) applications. The four rows of air vias along the -direction and two extended rectangular patches could shift the undesirable radiation mode upward and move the conical-beam radiation mode downward, respectively. Thus, the TE mode and the TE mode of the patch-loaded perforated rectangular substrate integrated dielectric resonator (SIDR) supporting the dual-beam radiation can be retained in the operating band, and their radiation can be improved by the air vias along the -direction. The T-shaped line coupled dual-slot structure could excite the above two modes, and a dual-slot mode supporting dual-beam radiation could also work. Then, a wideband DRA with a stable dual-beam radiation angle can be achieved, and its impedance matching can be improved by two air slots on two sides. Compared with the state-of-the-art dual-beam antennas, the proposed antenna shows a wider bandwidth, a higher radiation efficiency, and the substrate integration capability of DRA, making it more suitable for mm-wave applications. For demonstration, a 1 × 4 array was designed with the 10 dB impedance matching bandwidth of 41.2% and the directions of the dual beams between ±30° and ±35°.
本文提出了一种具有衬底集成能力的宽带双波束介质谐振器天线（DRA），用于毫米波（mm-wave）应用。沿 - 方向的四排空气通孔和两个扩展矩形贴片可分别将不良辐射模式向上移动，并将锥形波束辐射模式向下移动。因此，支持双波束辐射的贴片加载穿孔矩形衬底集成介质谐振器（SIDR）的TE模式和TE模式可保留在工作频段内，并且沿 - 方向的空气通孔可改善其辐射。T形线耦合双槽结构可激发上述两种模式，支持双波束辐射的双槽模式也可工作。然后，可实现具有稳定双波束辐射角度的宽带DRA，并且其两侧的两个空气槽可改善其阻抗匹配。与现有双波束天线相比，所提出的天线具有更宽的带宽、更高的辐射效率以及DRA的衬底集成能力，使其更适合毫米波应用。为作演示，设计了一个1×4阵列，其10 dB阻抗匹配带宽为41.2%，双波束方向在±30°和±35°之间。
