Single-layer waveguide power divider with chokes for dispensing with close electric contacts and its applications to planar antennas

无需紧密电接触的带扼流圈的单层波导功率分配器及其在平面天线中的应用

• 批准号: 13650396
• 负责人: ANDO Makoto
• 金额: $ 2.62万
• 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 (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650396/
• 关键词: choke; non electric contact; single-layer waveguide power divider; T junction; pi junction; beam steering; movable dielectric; cross junction; 可動狭壁

A compact receiver with a high gain planar array has been developed for 26GHz band fixed wireless access systems (FWA). This is the user wireless terminal (WT) in wireless IP access systems (WIPAS) and a drastic cost reduction as well as high efficiency is realized by using an alternating phase fed single layer waveguide array as well as MMIC. This terminal is 180×180×98 mm3 in volume which accommodates a 30 dBi antenna with radome, all the RF, IF and base band components as well as the Ethernet interface. This paper presents the design of WTs with the focus upon the unique antenna array as well as the installation of components that contribute to drastic reduction of the cost and the size.The alternating-phase fed single-layer slotted waveguide arrays are applied to 76GHz and two types of contact between the slotted plate and the feed structure are tested. 34.3dBi gain with 50% efficiency is obtained by thermo compression bonding at 76.0GHz, while 31.9dBi gain with 30% efficiency by the contact with screws.We have proposed a novel planar cross-junction as the unit for the center feed of radiating waveguides in single-layer slotted waveguide arrays in order to reduce the long line effect. The junction is analyzed by Galerkin's method of moments. By using four posts, the divided ratio is controlled both in amplitude and phase and the reflection is suppressed. The cross-junctions are designed and manufactured for two different coupling ratios of 10% and 25%. The calculated and measured results agree well with each other except the 10 deg. phase error in S21. The placement of the feed waveguide at the center would cause the blocking of the aperture and then the increasing sidelobe levels. Slot excitation over the antenna aperture should be synthesized to reduce these sidelobes ; this is one of the future studies. We showed the feasibility of this center feeds as applied for an alternating phase fed single-layer waveguide array.

专为 26GHz 频段固定无线接入系统 (FWA) 开发了一款具有高增益平面阵列的紧凑型接收器。这是无线IP接入系统(WIPAS)中的用户无线终端(WT)，通过使用交替相馈单层波导阵列以及MMIC，实现了成本的大幅降低和高效率。该终端体积为 180×180×98 mm3，可容纳带天线罩的 30 dBi 天线、所有 RF、IF 和基带组件以及以太网接口。本文介绍了WT的设计，重点关注独特的天线阵列以及有助于大幅降低成本和尺寸的组件安装。交替相位馈电单层开缝波导阵列应用于76GHz，并对开缝板和馈电结构之间的两种接触类型进行了测试。在76.0GHz下通过热压接合获得了34.3dBi增益，效率为50%，而通过螺钉接触获得了31.9dBi增益，效率为30%。我们提出了一种新型平面交叉结作为单层开槽波导阵列中辐射波导的中心馈电单元，以减少长线效应。通过伽辽金矩量法对连接点进行分析。通过使用四个柱，分频比在幅度和相位上都受到控制，并且反射被抑制。交叉结针对 10% 和 25% 两种不同的耦合比进行设计和制造。除了 10 度之外，计算结果和测量结果彼此吻合良好。 S21 中的相位误差。将馈电波导放置在中心会导致孔径阻塞，进而导致旁瓣电平增加。应合成天线孔径上的缝隙激励以减少这些旁瓣；这是未来的研究之一。我们展示了这种中心馈电应用于交替相位馈电单层波导阵列的可行性。

项目成果

Y.Kimura, Y.Miura, J.Hirokawa, M.Ando: "A Low-Cost and Compact Wireless Terminal with an Alternating Phase Fed single-Layer Waveguide Array For 26GHz Fixed Wireless Access Systems"Proceedings of JINA 2002. 2. 455-458 (2002)

Y.Kimura、Y.Miura、J.Hirokawa、M.Ando：“用于 26GHz 固定无线接入系统的具有交替相位馈电单层波导阵列的低成本紧凑型无线终端”JINA 2002. 2. 455 论文集

Yuichi KIMURA: "Low Sidelobe Single-Layer Slotted Waveguide Arrays at 76 GHz Band"IEICE Trans.on Communication. Vol.E84-B, No.9. 2377-2386 (2001)

Yuichi KIMURA：“76 GHz 频段低旁瓣单层开槽波导阵列”IEICE Trans.on Communication。

桧垣 誠: "金属板の機械的可動による一層構造導波管スロットアレーのビーム走査"電子情報通信学会技術報告. AP2001-170. 69-73 (2002)

Makoto Higaki：“通过机械移动金属板进行单层波导槽阵列的光束扫描”AP2001-170 (2002)。

新井大輔, 広川二郎, 安藤 真: "給電導波管を傾斜配置した逆相給電一層構造導波管アレーの反射量測定"電子情報通信学会2003年総合大会. B-1-90. 90 (2003)

Daisuke Arai、Jiro Hirokawa、Makoto Ando：“具有反相馈电的单层结构波导阵列的反射量的测量，其中馈电波导以一定角度排列”IEICE 2003 大会。 (2003)

S.-H Park, J.Hirokawa and M.Ando: "Planar Cross-Junction for the Center Feed in Single-Layer Slotted Waveguide Arrays"Proceedings of 2002 IEEE AP-S URSI International Symposium. 3. 416-419 (2002)

S.-H Park、J.Hirokawa 和 M.Ando：“单层开槽波导阵列中心馈电的平面交叉结”2002 年 IEEE AP-S URSI 国际研讨会论文集。