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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 周錫增 | |
| dc.contributor.author | Zong-Chen Tsai | en |
| dc.contributor.author | 蔡宗晨 | zh_TW |
| dc.date.accessioned | 2021-06-17T04:34:40Z | - |
| dc.date.available | 2021-08-13 | |
| dc.date.copyright | 2018-08-13 | |
| dc.date.issued | 2018 | |
| dc.date.submitted | 2018-08-09 | |
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Bo, Y. Fei, 'A multibeam antenna array based on printed Rotman lens', Int. J. Antennas Propag., vol. 2013, Jan. 2013. [22] W. Rotman, R. F. Turner, 'Wide-angle microwave lens for line source applications', IEEE Trans. Antennas Propagat., vol. AP-11, pp. 623-632, Nov. 1963. [23] T. Katagi, ' An improved design method of Rotman lens antennas ', IEEE Trans.Antennas Propag., vol. AP-32, no. 5, pp. 524-527, May 1984. [24] Ansoft Corporation, High Frequency Structure Simulator (HSFF) User Manual v12, Pittsburgh, PA, Ansoft Corporation, 2009. [25] Y. Rahmat-Samii and S.-W. Lee , ' Directivity of planar array feeds for satellite reflector applications, ' IEEE Trans. Antennas Propag., Vol. AP-31, No. 3, pp.463-470, May 1983. [26] H.T. Chou, L. R. Kuo, H.-H. Chou, K. L. Hung, P. Nepa, 'Realistic implementation of ellipsoidal reflector antennas to produce near-field focused patterns', Radio Sci., vol. 46, no. 5, pp. 1-10, Oct. 2011. [27] A. Buffi, P. Nepa, G. Manara, 'Design criteria for near-field-focused planar arrays', IEEE Antennas Propag. Mag., vol. 54, no. 1, pp. 40-50, Feb. 2012. [28] Hsi-Tseng Chou and Zong-Chen Tsai, “Near-Field Focus Radiation of Multi-Beam Phased Array of Antennas Realized by Using Modified Rotman Lens Beamformer”, under review, IEEE Trans. Antennas Propagat., 2018. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/70679 | - |
| dc.description.abstract | 在本文介紹了，以Rotman lens的概念去設計波束成形網絡，以達到具有多波束效果的應用。其中本研究，分為兩個部份。第一個部份為金屬波導型透射陣列天線在指定截面上輻射出共線分佈的多波束的設計方法。該方法是通過將二維Rotman lens的概念擴展到三維結構而開發的。金屬波導型透射陣列天線的曲面輪廓是由Rotman lens決定的。在這裡Rotman lens是由三個饋電天線到曲面輪廓間的空氣部分。第二個部分介紹了二維相控陣天線的設計，可用於近場聚焦的應用。其是利用一個以FR4為基板的Rotman lens波束形成器去激發一個二維相控陣列天線，以便在近場的地方聚焦出期望的多波束。這個天線組可以在2.45GHz下實現RFID應用。研究的最後分別進行了數值模擬跟測量結果得比較。 | zh_TW |
| dc.description.abstract | In this article, the concept of Rotman lens is used to design a beamforming network to achieve applications with multiple beam effects. The study is divided into two parts. First part is about the design methodology of metallic waveguide-type transmitarray antenna. This transmitarray antenna can radiate multiple beams collinearly which are distributed on a desired cut of radiation patterns. This method is developed by extending the concept of a 2-D Rotman lens to a 3-D configuration. The curved surface profile of the metallic waveguide-type transmitarray antenna is determined by the Rotman lens. Here, Rotman lens is the air part between the three feeding antennas to the curved surface. The second section describes the design of a 2-D phased array of antennas that can be used for near-field focus applications. In this design, it uses a Rotman lens beamformer with FR4 as the substrate to excite a 2-D phased array of antennas to radiate collinear multiple beams in the near-field. This antenna set is realized at 2.45GHz for RFID applications. To this end, related theoretical and simulation studies are carried out. The measurement results are compared with the results of the simulation studies. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T04:34:40Z (GMT). No. of bitstreams: 1 ntu-107-R05942082-1.pdf: 5225693 bytes, checksum: 5e356a7e64f6dedbdb7d7f8007f236e3 (MD5) Previous issue date: 2018 | en |
| dc.description.tableofcontents | 口試委員會審定書............................................................................................. ii
中文摘要............................................................................................................ iii Abstract............................................................................................................... iv 目錄..................................................................................................................... v 圖目錄................................................................................................................ viii 表目錄................................................................................................................. xi 第一章 緒論....................................................................................................... 1 1.1 前言............................................................................................................. 1 1.2 研究背景..................................................................................................... 2 第二章 通過擴展二維的Rotman Lens配置金屬波導型透射陣列天線以實現多 波束應用...................................................................................................... 3 2.1 介紹............................................................................................................. 3 2.2 將二維的Rotman Lens擴展至三維的結構................................................ 5 2.3 透射陣列天線結構的設計方法................................................................. 12 2.3.1 決定所需傳輸線的長度.................................................................. 12 2.3.2 設計程序.......................................................................................... 15 2.3.2.1 建立輻射陣列孔徑平面與Rotman lens曲面的相對位置....15 2.3.2.2 確定Rotman Lens的曲面輪廓.............................................. 15 2.3.2.3 建造一個對應到的表格....................................................... 16 2.3.2.4 確定Rotman Lens表面上陣列饋電點的位置，並找出陣列孔徑上實際 元件的位置........................................................ 16 2.3.2.5 建立適當的饋電點............................................................... 18 2.3.3 波導的操作模態.............................................................................. 19 2.4 數值模擬結果.............................................................................................. 21 2.4.1 波導型傳輸線的特性....................................................................... 21 2.4.2 Rotman Lens曲面輪廓的特性.......................................................... 23 2.4.2.1 與............................................................................................ 24 2.4.2.2 和之間的映射關係................................................................ 26 2.4.2.3 金屬透射陣列天線的實現.................................................... 28 2.4.3 透射陣列天線的輻射特性............................................................... 31 2.4.3.1 孔徑的場相位和振幅的變化................................................ 31 2.4.3.2 多波束的輻射場型................................................................ 39 第三章 用改進的Rotman Lens波束形成器實現多波束相控陣列天線的近場聚焦 輻射............................................................................................................... 44 3.1 介紹.............................................................................................................. 44 3.2 天線系統的實施方法.................................................................................. 47 3.2.1 基本系統架構................................................................................... 47 3.2.2 天線元件和陣列佈置....................................................................... 50 3.2.3 近場聚焦輻射的準解析................................................................... 54 3.3 近場聚焦的Rotman Lens波束形成器的設計............................................. 55 3.3.1 確定Rotman Lens波束形成器的輪廓.............................................. 55 3.3.2 特性討論...................................................................................... 61 3.4 數值和實驗驗證........................................................................................... 62 3.4.1 準解析的數值結果............................................................................ 62 3.4.2 近場聚焦Rotman Lens波束形成網絡的特性................................... 63 3.4.3 近場聚焦天線陣列的特性................................................................ 71 第四章 結論....................................................................................................... 79 參考文獻....................................................................................................... 81 | |
| dc.language.iso | zh-TW | |
| dc.subject | 透射陣列天線 | zh_TW |
| dc.subject | 多波束 | zh_TW |
| dc.subject | 羅特曼透鏡 | zh_TW |
| dc.subject | 波導陣列 | zh_TW |
| dc.subject | 近場聚焦 | zh_TW |
| dc.subject | Beam forming network | en |
| dc.subject | Multi-beam radiation | en |
| dc.subject | Rotman lens | en |
| dc.subject | Transmitarray antennas | en |
| dc.subject | Waveguide array | en |
| dc.subject | Antenna arrays | en |
| dc.subject | Near-Field Focus Radiation | en |
| dc.title | 以羅特曼透鏡為波束成形網絡之陣列天線實現 | zh_TW |
| dc.title | Phased Array of Antenna Based on
Rotman Lens Beamformer | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 106-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 吳宗霖,林怡成,段世中 | |
| dc.subject.keyword | 多波束,羅特曼透鏡,透射陣列天線,波導陣列,近場聚焦, | zh_TW |
| dc.subject.keyword | Multi-beam radiation,Rotman lens,Transmitarray antennas,Waveguide array,Antenna arrays,Beam forming network,Near-Field Focus Radiation, | en |
| dc.relation.page | 84 | |
| dc.identifier.doi | 10.6342/NTU201802811 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2018-08-10 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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