Development of Antenna System Technologies Useful for Millimeter-Wave Wireless Local Area Networks

本课题组取得了以下成果，为毫米波无线局域网系统的发展做出了重要贡献.作为毫米波平面扇形天线的基本单元，研制了一种后向激励印刷缝隙阵。还提出了一种使用该阵列构建平面型扇形天线的新型配置。所提出的技术的有效性已被证实与数值和实验的方式.提出了一种印刷缝隙八木宇田天线阵，并研究了用该天线阵制作的平面扇形天线。基于谱域矩量法对扇形天线进行了分析，验证了天线的有效性能.提出了一种具有后壁腔的印刷缝隙八木天线阵。对该阵列进行了时域有限差分法（FDTD）分析，得到了设计准则。制作并测试了由该阵列构成的平面扇形天线。测量结果表明，在天线上不设置金属屏蔽墙的情况下，相邻天线阵之间的相互作用可以忽略.制作了一种由磁环天线构成的准光天线混频器阵列，并进行了测试。提出了一种由准光天线混频器构成的新型二维阵列系统，并从理论上揭示了其接收特性。在10GHz频段的实测结果证实了该方案的有效性.提出了一种基于镜像NRD波导的毫米波天线和电路。研制了一种谐振型漏波天线，实现了宽边辐射和低副瓣电平。研究了由镜像NRD波导构成的介质杆天线。此外，还提出了从镜像NRD波导到矩形波导的过渡，并在30GHz波段进行了实验验证。

Our research group obtained the following results that contribute greatly to the development of millimeter-wave wireless local area network systems.1. As a basic element of millimeter-wave planar-type sector antennas, a printed slot array with backward excitation was developed. A novel configuration for constructing a planar-type sector antenna using this array was also proposed. The effectiveness of the proposed techniques has been confirmed with numerical and experimental manner.2. A printed slot Yagi-Uda array was proposed, and a planar-type sector antenna made by this array was investigated. Analysis of the sector-antenna based on spectral domain moment method was carried out to confirm the effective performance of the investigated antenna.3. A printed slot Yagi-Uda array with post-wall cavity was proposed. FDTD analysis on this array was carried out to obtain the design guideline. A planar-tyep sector antenna composed of this array was fabricated and measured. From the measured results, it is revealed that the interaction effect between the adjacement arrays can be ignored without arranging metal shielding walls on the antenna.4. A quasi-optical antenna mixer array composed of a magnetic loop antenna was fabricated and measured. A novel 2-dimensional array system consisting of the quasi-optical antenna mixer was proposed, and its receiving characteristics were revealed theoretically. Measured results obtained at 10GHz band confirmed the effective performance of the proposal.5. Millimeter-wave antennas and circuits based on an image NRD guide were proposed. A resonant-type leaky wave antenna, realizing the broadside radiation and low sidelobe level, was developed. A dielectric rod antenna constructed from the image NRD guide was investigated. In addition, a transition from the image NRD guide to a rectangular waveguide was also proposed and its effective performance was demonstrated with experiments at 30GHz band.