Integration of Millimeter-Wave Post-Wall Waveguide-Fed Parallel Plate Slot Array with Planar RF Circuits

毫米波壁后波导馈电平行板槽阵列与平面射频电路的集成

• 批准号: 12555108
• 负责人: HIROKAWA Jiro
• 金额: $ 8.58万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555108/
• 关键词: millimeter wave; post; slot antenna; planar antenna; Butler matrix; waveguide

Various sizes of 76-Ghz post-wall waveguide-fed parallel plate slot arrays are designed and manufactured. 40-50 % efficiency has been obtained for various sizes from 26 mm x 24 mm to 104 mm x 100 mm. Sidelobe suppression is demonstrated for car radar applications. Measured sidelobes are below -22 dB for one-dimensional Taylor tapering while those for two-dimensional Taylor distribution are below -18 dB. A new configuration of three slots is proposed to radiate a 45-degree linearly polarized wave. A good cross-polarization level below -25 dB is achieved in the boresight.The internal fields and the aperture illumination are effectively approximated in an oversized rectangular slotted array. Excitation coefficient of the radiation unit is assumed by introducing the perturbation ratio, which is defined by the ratio of unit-incident fields in terms of that in the linear array design model of periodic boundary waveguide. This ratio is varied over the two-dimensional aperture of the array and explains the perturbation of slots and narrow walls. The measured aperture illumination shows the good agreement with the prediction by the proposed method.A single layer structure consisting of a 4-way Butler matrix and a waveguide slot array in the post wall waveguides is proposed. Each one of four input ports generates different linear phase distribution over the elements, and results in different main beam directions. Butler matrix generally needs cross-junctions in three-dimensional structure. The single-layer structure is realized by introducing short slot directional couplers. A 26 GHz model is designed and manufactured. Switching operation has been confirmed.

设计并制作了各种尺寸的76 GHz后壁波导馈电平行板缝隙阵列天线。从26 mm x 24 mm到104 mm x 100 mm的各种尺寸都获得了40- 50%的效率。旁瓣抑制已在汽车雷达应用中得到验证。对于一维泰勒锥形，测得的旁瓣低于-22 dB，而对于二维泰勒分布，测得的旁瓣低于-18 dB。提出了一种新的三缝隙结构，可以辐射45度线极化波。该天线阵的交叉极化水平低于-25dB，内部场和孔径照度都能有效地近似于超大矩形缝隙阵。通过引入微扰比来假定辐射单元的激励系数，微扰比由单元入射场与周期边界波导线阵设计模型中单元入射场的比值来定义。该比率在阵列的二维孔径上变化，并解释了槽和窄壁的扰动。实验结果表明，该方法能够较好地预测孔径照度。提出了一种由4路Butler矩阵和波导缝隙阵列组成的单层结构。四个输入端口中的每一个在元件上产生不同的线性相位分布，并且导致不同的主波束方向。Butler矩阵在三维结构中一般需要交叉结点。通过引入短槽定向耦合器实现了单层结构。设计并制作了一个26 GHz的模型。已确认切换操作。

项目成果

甲斐(久), 広川, 安藤: "オーバーサイズ方形導波管スロットアレーの励振電磁界の解析と評価"電子情報通信学会技術報告. AP2001-5. 31-38 (2001)

Hisashi Kai，Hirokawa，Ando：“超大矩形波导缝隙阵列的激励电磁场的分析和评估” IEICE 技术报告 31-38（2001）。

Jiro Hirokawa, Makoto Ando: "Sidelobe Suppression in 76GHz Post-Wall Waveguide-Fed Parallel Plate Slot Arrays"IEEE Transactions on Antennas & Propagation. 48・11. 1727-1732 (2000)

Jiro Hirokawa、Makoto Ando：“76GHz 后壁波导馈电平行板槽阵列中的旁瓣抑制”IEEE Transactions on Antennas & Propagation 48・11 (2000)。

山本, 広川, 安藤: "ポスト壁導波路を用いたミリ波帯スロットアレーと給電用4分岐バトラーマトリックスの一層基板による構成"電子情報通信学会技術報告. MW2001-108. 67-72 (2001)

Yamamoto、Hirokawa、Ando：“使用后墙波导和四分支巴特勒矩阵供电的毫米波带槽阵列的单层基板配置” IEICE 技术报告 67-72 (2001)。

細川, 広川, 安藤: "櫛型配列を用いた偏波共用一層構造導波管スロットアレー"電子情報通信学会技術報告. AP2001-171. 75-80 (2002)

Hosokawa、Hirokawa、Ando：“使用梳状阵列的偏振双层单层波导缝隙阵列” IEICE 技术报告 75-80 (2002)。

Jiro Hirokawa and Makoto Ando: "Sidelobe Suppression in 76GHz Post-Wall Waveguide-Fed Parallel Plate Slot Arrays"IEEE Transactions on Antennas & Propagation. 48-11. 1727-1732 (2000)

Jiro Hirokawa 和 Makoto Ando：“76GHz 后墙波导馈电平行板槽阵列中的旁瓣抑制”IEEE Transactions on Antennas