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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83633完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 盧信嘉(Hsin-Chia Lu) | |
| dc.contributor.author | Fu-Ching Wang | en |
| dc.contributor.author | 王輔璟 | zh_TW |
| dc.date.accessioned | 2023-03-19T21:12:30Z | - |
| dc.date.copyright | 2022-08-26 | |
| dc.date.issued | 2022 | |
| dc.date.submitted | 2022-08-22 | |
| dc.identifier.citation | [1]Constantine. A. Balanis, 3rd edition, Antenna Theory: Analysis and Design. John Wiley & Sons, 2005. [2]Y. Liu, X. Liu, X. Mu, T. Hou, J. Xu, Marco Di Renzo, Naofal Al-Dhahir, 'Reconfigurable intelligent surfaces: principles and opportunities,' in IEEE Communications Surveys & Tutorials, vol. 23, no. 3, pp. 1546-1577, May. 2021. [3]D. M. Pozar, 4th edition, Microwave Engineering. John Wiley & Sons, 2011. [4]S.-C. Hsu, “Reflection characteristics of a gradient artificial magnetic conductor,” Master Thesis, Graduate Institute of Communication Engineering, National Chiao Tung University, Aug. 2010. [5]Bharath G. Kashyap, Panagiotis C. Theofanopoulos, Aditya S. Shekhawat, Anuj Y. Modi, Anand P.S. Sengar, Sanjay K.V. Kumar, Arkajyoti Chang, Tawfik Osman, Ahmed Alkhateeb, and Georgios C. Trichopoulos, 'A reconfigurable intelligent surface for 5G wireless communication applications,' 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), Dec. 2021, pp. 111-112 [6]P. Choi, D. A. Antoniadis and E. A. Fitzgerald, 'Towards millimeter-wave phased array circuits and systems for small form factor and power efficient 5G mobile devices,' 2019 IEEE International Symposium on Phased Array System & Technology (PAST), Oct. 2019, pp. 1-5 [7]4.11 Radar Cross Section (RCS). [Online]. Available: https://vdocuments.mx/411-radar-cross-section-rcs.html [8]Phased Array Antenna Patterns - Part 2 : Grating Lobes and Beam Squint [Online]. Available:https://www.analog.com/cn/design-center/landing-pages/002/tech-articles-taiwan/phased-array-antenna-patterns-part2.html [9]Probability density function [Online]. Available: https://en.wikipedia.org/wiki/Probability_density_function [10]Cumulative distribution function [Online]. Available: https://en.wikipedia.org/wiki/Cumulative_distribution_function [11]R4-1700095 [NR] 'Discussion of mmWave UE EIRP and EIS test c2 angle selection,' 3GPP TSG-RAN WG4 NR AH Meeting, Jan. 2017 [12]UV mapping. [Online]. Available: https://en.wikipedia.org/wiki/UV_mapping [13]Sphere Point Picking. [Online]. Available: https://mathworld.wolfram.com/SpherePointPicking.html? [14]DXFLib - File Exchange - MATLAB Central [Online]. Available:https://www.mathworks.com/matlabcentral/fileexchange/33884-dxflib [15]DRM_PCB [Online]. Available: https://www.tsri.org.tw/tw/commonPage.jsp?kindId=C0009 [16]D. M. Pozar, Microwave and RF Design of Wireless Systems. John Wiley & Sons, 2000. [17]Root Mean Square & Standard Deviation [Online]. Available: https://zh.wikipedia.org/wiki/%E5%B9%B3%E6%96%B9%E5%B9%B3%E5%9D%87%E6%95%B0 [18]QuinStar QGH-APRS00 [Online]. Available: https://www.everythingrf.com/products/waveguide-horn-antennas/quinstar-technology-inc/617-399-qgh-aprs00 [19]The LB5940A 1 MHz to 40 GHz True RMS Power Sensor [Online]. Available: https://www.ladybug-tech.com/product/the-lb5940a-1-mhz-to-40-ghz-true-rms-power-sensor/ [20]Near and far field [Online]. Available: https://en.wikipedia.org/wiki/Near_and_far_field | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83633 | - |
| dc.description.abstract | 為了解決5G毫米波傳送時容易被障礙物阻擋而形成通訊盲區之問題，本論文提出採用相位陣列天線理論與光柵波瓣合成方法，使用相同大小金屬片的散射陣列面來實現全向性散射，本散射面不需任何主動及控制電路即可使訊號散射到室內或室外因遮蔽物或角落造成的通訊盲區，以改善服務範圍。 本論文首先介紹雷達截面積概念來描述平面金屬散射單元的散射特性。隨即提出相位陣列天線理論，進而帶入光柵波瓣現象，分析天線單元間距與光柵波瓣及零點的關係。後續再提出應用光柵波瓣合成方式，觀察不同間距所產生不同角度的光柵波瓣及零點，經由模擬結合不同間距的天線單元合成最終散射場型，並使用MATLAB Code實現陣列隨機排列演算法，以產生最後陣列佈局。根據雷達方程式來預估此散射陣列面在不同方向的散射功率，也提出使用機率密度函數及累積分布函數來做為評估散射分散程度的指標。 實際量測方面，量測系統包含兩個28GHz號角天線當作發射天線及接收天線、訊號產生器、本論文設計之散射陣列面、電控旋轉台與功率感測器所組成，驗證在有無使用散射陣列面情況下，不同角度之功率散射情形。其量測結果與理論分析模擬大致吻合。加入散射面後可改善將近15dB，且在入射方向以外±30°的改善效果更加明顯。 | zh_TW |
| dc.description.abstract | In order to solve the blind spot caused by obstacles in 5G mmWave, this thesis presents a scattering array surface by using phased array antenna theory and grating lobe synthesis method, which can achieve omnidirectional scattering by using same-size planar metal scattering elements. This scattering array can scatter the signal to reach the indoor or outdoor communication blind area caused by shelters or corners without any active and control circuit. So the service area can be increased. Firstly, this thesis introduces radar-cross-section (RCS) area to describe the scattering characteristics of planar metal scattering element. Secondly, we present the phased array antenna theory and grating lobes. Then we analyze the relationship between antenna elements’ spacing, grating lobes and nulls. Then, we observe the amplitude of grating lobes and nulls at different angles generated by different element spacings. The final scattering array is synthesized by combining antenna elements with random spacing, generated by MATLAB code. Based on radar equation, the scattered power in the different directions of this scattering array surface are calculated. Probability density function (PDF) and cumulative distribution function (CDF) are also used as indicators for evaluating the degree of scattering. The measurement system includes two 28GHz horn antennas, signal generator, scattering array, rotator and power sensor. The system can verify the scattered power at different scattering angles with or without scattering array surface. The measurement results fit well with theoretical prediction. The received signal is improved by about 15dB with the scattering array, and the scattering is more effective when the signal is scattered over ±30° apart from the direct path. | en |
| dc.description.provenance | Made available in DSpace on 2023-03-19T21:12:30Z (GMT). No. of bitstreams: 1 U0001-2208202211200600.pdf: 5611724 bytes, checksum: 8549d45213dce999dc65cc11a7729d3f (MD5) Previous issue date: 2022 | en |
| dc.description.tableofcontents | 誌謝 i 中文摘要 ii ABSTRACT iii 目錄 iv 圖目錄 vi 表目錄 xi Chapter 1 緒論 1 1.1 研究背景 1 1.2 研究動機與應用情境 2 1.3 文獻回顧 3 1.4 文章貢獻 7 1.5 章節介紹 8 Chapter 2 相位陣列天線和光柵波瓣合成理論 9 2.1 無線通訊系統介紹 9 2.2 雷達截面積 10 2.3 天線陣列的陣列因子 13 2.3.1 線性陣列的陣列因子 14 2.3.2 平面陣列的陣列因子 16 2.4 天線陣列之光柵波瓣 20 Chapter 3 光柵波瓣合成之散射陣列天線 23 3.1 散射天線單元 23 3.1.1 貼片天線理論[1] 23 3.1.2 散射貼片天線設計與模擬 26 3.1.3 特性評估方法 29 3.2 光柵波瓣強度合成 32 3.3 散射陣列排列之演算法 35 3.4 模擬結果 37 3.4.1 散射陣列面使用前後比較 40 3.4.2 基於相同介質之單層與雙層散射陣列比較 49 3.4.3 基於雙層散射陣列之不同介質比較 58 3.4.4 散射結果特性比較 64 3.4.5 散射極化特性 69 3.4.6 散射特性頻寬 71 3.4.7 小散射面併排為大散射面 73 3.4.8 散射單元相角分佈與散射能量分佈關係 78 Chapter 4 量測結果 82 4.1 量測系統與環境介紹 82 4.2 散射陣列面量測 85 4.2.1 散射陣列面使用前後差異量測 85 4.2.2 基於相同介質之單層與雙層散射陣列量測 91 4.2.3 基於雙層散射陣列之不同介質量測 93 4.3 量測結果討論與比較 95 Chapter 5 結論與未來展望 98 5.1 結論 98 5.2 未來展望 98 參考文獻 99 | |
| dc.language.iso | zh-TW | |
| dc.subject | 電波散射 | zh_TW |
| dc.subject | 光柵波瓣 | zh_TW |
| dc.subject | 相位陣列天線 | zh_TW |
| dc.subject | 5G通訊 | zh_TW |
| dc.subject | 毫米波頻段 | zh_TW |
| dc.subject | 可重構智能反射面 | zh_TW |
| dc.subject | fifth-generation communication system | en |
| dc.subject | EM wave scattering | en |
| dc.subject | reconfigurable intelligent surfaces | en |
| dc.subject | grating lobe | en |
| dc.subject | phased array antenna | en |
| dc.subject | millimeter wave frequency | en |
| dc.title | 使用均勻大小平面金屬散射單元之全向性毫米波散射陣列面 | zh_TW |
| dc.title | A Millimeter Wave Scattering Array Surface Using Uniform Size Planar Metal Scattering Elements for Omnidirectional Scattering | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 110-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 邱奕鵬(Yih-Peng Chiou),馬自莊(Tzyh-Ghuang Ma),陳晏笙(Yen-Sheng Chen) | |
| dc.subject.keyword | 5G通訊,毫米波頻段,相位陣列天線,光柵波瓣,可重構智能反射面,電波散射, | zh_TW |
| dc.subject.keyword | fifth-generation communication system,millimeter wave frequency,phased array antenna,grating lobe,reconfigurable intelligent surfaces,EM wave scattering, | en |
| dc.relation.page | 100 | |
| dc.identifier.doi | 10.6342/NTU202202634 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2022-08-22 | |
| 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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| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| U0001-2208202211200600.pdf 未授權公開取用 | 5.48 MB | Adobe PDF |
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