博碩士論文 110521119 詳細資訊




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姓名 賴群(Lai Chiun)  查詢紙本館藏   畢業系所 電機工程學系
論文名稱 一種基於類表面電漿之高頻地波雷達部署方法
(A Deployment Method of High-Frequency Ground Wave Radars Using Spoof Surface Plasmons)
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檔案 [Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   至系統瀏覽論文 (2028-12-27以後開放)
摘要(中) 本論文將會針對地波雷達於傳播路徑上的模態不匹配與接收端所產生的破壞性干
涉此兩大議題提出一種全新的雷達部署方法。其部署方式的關鍵就在於把激發源的位置
從地面上改由從地底激發,並透過以類表面電漿結構作為模態過渡的橋樑,將其放置於
地波雷達天線的上方且與海水相鄰,使其不同頻段產生的類表面電漿模態電場分布與地
波相似,幫助地波雷達天線輻射能量耦合(即為能量轉移)成地波進而提高激發地波的效
率。此外,為了驗證在不同頻段產生與地波相似的類表面電漿模態電場分布,本論文使
用本徵模態法與多層同/異向性之週期性結構反射/透射法進行模態分析。
本論文的激發源分為兩種,半波長偶極天線陣列以及洩漏波天線,因此第二章也會
論述各自的設計方法與流程,並將經基因演算法設計後的洩漏波天線與傳統串列式饋入
貼片天線相比較,並在設計時間與主波束角偏移的部分取得一些優勢。第三章則是整個
地波雷達場景的模擬與量測結果,並且透過量測結果得知本論文提出的雷達部署方法確
實可行,在量測的頻段(8GHz-17GHz)中達到地波增強的效果,並且具有 66%的相對頻
寬,可涵蓋現有的地波雷達頻段並實際應用。
摘要(英) This thesis presents a novel radar deployment method aimed at addressing two major issues
in ground wave radar : modal mismatch along the propagation path and the destructive
interference generated at the receiving end. The key to this deployment approach lies in
relocating the excitation source from the ground surface to the subterranean level. By
employing a metallic, expandable periodic structure as a bridge for modal transition, this
excitation source is placed above the ground wave radar antenna, adjacent to seawater. This
placement results in the generation of surface plasmon mode field distributions in different
frequency bands that resemble ground waves, assisting in the efficient coupling and transfer
of radiation energy from the ground wave radar antenna into ground waves, thereby enhancing
the efficiency of exciting ground waves.Additionally, to verify the generation of surface
plasmon mode field distributions similar to ground waves in different frequency bands, this
thesis utilizes the eigenmode method and the reflection/transmission method of multi-layer
periodic structures with both isotropic and anisotropic properties for modal analysis.
III
The excitation sources in this thesis are divided into two types: half-wavelength dipole
antenna arrays and leaky wave antennas. Therefore, Chapter 2 also discusses their respective
design methods and processes. A comparison is made between the leaky wave antenna designed
using a genetic algorithm and traditional serial-fed patch antennas, highlighting advantages in
design time and main beam angle offset.Chapter 3 focuses on the simulation and measurement
results of the entire ground wave radar scenario. Through these results, it is confirmed that the
radar deployment method proposed in this thesis is indeed feasible. It achieves ground wave
enhancement in the measured frequency range (8GHz-17GHz) and possesses a relative
bandwidth of 66%. This bandwidth covers existing ground wave radar frequency bands and is
suitable for practical applications.
關鍵字(中) ★ 類表面電漿 關鍵字(英) ★ Spoof Surface Plasmons
論文目次 目錄
摘要............................................................................................................................................ I
Abstract ....................................................................................................................................II
誌謝......................................................................................................................................... IV
目錄...........................................................................................................................................V
圖目錄....................................................................................................................................VII
表目錄.................................................................................................................................... XV
第一章 緒論............................................................................................................................1
1-1 研究動機....................................................................................................................1
1-2 超視距雷達................................................................................................................2
1-3 地波議題&設計理念.................................................................................................5
1-4 章節架構..................................................................................................................10
第二章 類表面電漿以及天線激發源之理論與驗證.......................................................... 11
2-1 類表面電漿.............................................................................................................. 11
2-1-1 類表面電漿模態介紹...................................................................................... 11
2-1-2 多層同/異向性之週期性結構反射/透射法....................................................17
2-1-3 本徵模分析......................................................................................................24
2-2 洩漏波天線..............................................................................................................31
2-2-1 費洛凱理論與空間諧波..................................................................................31
2-2-2 色散分析與色散曲線圖..................................................................................33
2-2-3 基因演算法流程..............................................................................................37
2-2-4 基因演算法與洩漏波天線之整合應用..........................................................38
2-2-5 基於基因演算法之洩漏波天線......................................................................45
VI
2-3 半波長偶極天線陣列..............................................................................................60
2-3-1 半波長偶極天線..............................................................................................60
2-3-2 半波長偶極天線陣列......................................................................................63
第三章 量測結果與驗證......................................................................................................86
3-1 使用半波長偶極天線陣列作為激發源..................................................................86
3-2 使用洩漏波天線作為激發源................................................................................108
3-3 使用平面波作為激發源........................................................................................120
第四章 結論........................................................................................................................128
參考文獻................................................................................................................................129
附錄一、利用基因演算法設計洩漏波天線之程式碼........................................................135
附錄二、Anritsu Time Gating 步驟 ..................................................................................154
附錄三、以 dipole antenna 代替平面波.............................................................................157
附錄四、洩漏波天線之六邊形孔徑大小............................................................................162
附錄五、 ITU-R P.676-13 的建議書 ..................................................................................164
附錄六、 邊界條件 layered impedance 設定順序............................................................165
附錄七、發射天線放置在地底與地面上之比較................................................................166
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Persistent Link : https://ieeexplore.ieee.org/servlet/opac?bknumber=8052366.
指導教授 歐陽良昱(Liang-Yu Ou Yang) 審核日期 2024-1-3
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