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Study on sub-millimeter wave superconducting array antenna

亚毫米波超导阵列天线研究

基本信息

批准号：
07555420
负责人：
OHSHIMA Shigetoshi
金额：
$ 1.73万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555420/
关键词：
superconducting antenna patch antenna YBCO thin film antenna gain array antenna oxide superconductor

项目摘要

We have investigated the sub-millimeter wave superconducting array antenna, design, fabrication and characterization. These experimental results are as follows ;(1) Establishment of the design method of patch antenna operated at microwave region.We designed the patch antenna with a resonance frequency of 5 GHz and an input impedance of 50 ohms by the transmission line model and a Sonnet Software. In order to check the validity of the transmission line model, we first fabricated the Cu patch antenna, We could obtain the Cu patch antenna with input impedance of approximately 50 ohms and the resonance frequency of 50 ohms.(2) Fabrication and characterization of superconducting patch antenna.We fabricated the superconducting patch antenna using YBCO thin films. The input impedance of these antenna was slightly larger than that of designed value, 50 ohms. The gain of superconducting patch antenna was 2-4 dB higher than that of Au film antenna.(3) Preparation of YBCO thin film for microwave applications by a plasma coupled magnetron sputtering.We fabricated the YBCO thin films for superconducting antenna by a plasma coupled magnetron sputtering. The Tc and Jc of these films obtained were 87K and 4 x 10^6A/cm^2 at 77K,respectively.(4) Study on a log-periodic antenna operated in millimeter and sub-millimeter wave regionWe designed and fabricated the log-periodic antenna for millimeter and sub-millimeter weve region. We confirmed that the antenna was operated up to 40 GHz. The gain was approximately the same with that of a patch antenna.

我们研究了亚毫米波超导阵列天线的设计、制作和特性。主要研究工作如下：（1）建立了工作在微波频段的贴片天线的设计方法，利用传输线模型和Sonnet软件设计了谐振频率为5GHz、输入阻抗为50 Ω的贴片天线。为了验证传输线模型的正确性，我们首先制作了Cu贴片天线，得到了输入阻抗约为50欧姆，谐振频率约为50欧姆的Cu贴片天线。(2)超导贴片天线的制作与特性研究我们利用YBCO薄膜制作了超导贴片天线。这些天线的输入阻抗略大于设计值50欧姆。超导贴片天线的增益比Au薄膜天线高2-4 dB。(3)等离子体耦合磁控溅射法制备微波用YBCO超导薄膜本文采用等离子体耦合磁控溅射法制备了用于超导天线的YBCO超导薄膜。在77 K时，薄膜的Tc和Jc分别为87 K和4 × 10^6A/cm ^2。(4)毫米波和亚毫米波对数周期天线的研究我们设计并制作了毫米波和亚毫米波对数周期天线。我们确认天线的工作频率高达40 GHz。增益与贴片天线的增益大致相同。