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姓名 謝浩喆(Hao-Che Hsieh) 查詢紙本館藏 畢業系所 電機工程學系 論文名稱 應用於Ka頻段系統之圓極化背腔式孔徑天線設計
(Design of Circularly Polarized Cavity-Backed Aperture Antenna for Ka-Band Applications)相關論文 檔案 [Endnote RIS 格式]
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至系統瀏覽論文 (2026-7-1以後開放)
摘要(中) 本論文提出應用於Ka頻段系統之圓極化背腔式孔徑天線設計。天線由一個孔徑天線及一個背腔反射板組成,由於孔徑天線具有雙向輻射的特性,因此在天線下方放置背腔反射板來抑制向下輻射與提高天線增益。為了避免天線在傳輸或接收電磁波的過程中受到多重反射干擾,而圓極化天線可以減輕這方面的問題並提高傳輸訊號的品質與穩定度,本設計藉由調整L型饋入結構的長度與寬度來改變相位差及大小進而產生圓極化的效果,透過加入殘段、步階結構與改變背腔形狀,可以有效的拓展阻抗頻寬及軸比頻寬。
天線的設計是使用台灣半導體研究中心提供之RO4003高頻兩層板材製作,天線的背腔厚度為0.125 λ0 (λ0為26.5 GHz的自由空間波長),天線的量測結果顯示阻抗頻寬為55.07% (22.75-40.04 GHz),軸比頻寬為20.16% (26-31.38 GHz)及2.19%(35.56-36.35 GHz),所提出的天線呈現右手圓極化,且最大增益為8.26 dBi。摘要(英) Designs of circularly polarized cavity-backed aperture antenna for Ka-band applications are proposed in the thesis. The proposed antenna consists of a cavity-backed aperture. The aperture has the characteristics of bidirectional radiation, so that a cavity-backed reflector is placed under the aperture to suppress downward radiation and increase upward antenna gain. In order to prevent the antenna form being interfered by multiple reflections when transmitting or receiving electromagnetic waves, the circularly polarized antenna can improve the quality and stability of the transmission signal. In this design, the phase difference and size are changed by adjusting length and width of the L-shaped feed structure to produce the effect of circular polarization. By adding stubs, stair-shape structures and changing the shape of the cavity, the impedance bandwidth and axial ratio bandwidth of antenna can be effectively enhanced.
The proposed antenna is made of RO4003 high-frequency two-layer board provided by Taiwan Semiconductor Research Insitute. The cavity thickness of the antenna is 0.125λ0 (λ0 is the free space wavelength at 26.5 GHz). Measured results of the antenna show that the impedance bandwidth is 55.07% (22.75-40.04 GHz), axial ratio bandwidth is 20.16% (26-31.38 GHz) and 2.19%(35.56-36.35 GHz). The proposed antenna exhibits right-handed circular polarization with a peak gain of 8.26 dBi.關鍵字(中) ★ 孔徑天線
★ Ka頻段
★ 圓極化
★ 背腔關鍵字(英) ★ Aperture Antenna
★ Ka-Band
★ Circularly Polarized
★ Cavity-Backed論文目次 摘要 vi
Abstract vii
誌謝 viii
目錄 ix
圖目錄 xii
表目錄 xvii
第一章 序論 1
1-1 研究動機 1
1-2 文獻回顧 3
1-3 章節介紹 7
第二章 應用於Ka頻段之圓極化孔徑天線設計與分析 8
2-1 簡介 8
2-1-1 圓極化天線概述 8
2-1-2 圓極化天線設計理念 10
2-1-3 天線製程介紹 10
2-2 應用於Ka頻段之圓極化孔徑天線設計 11
2-3 天線調整機制與參數分析 18
2-3-1 參數wa2對阻抗頻寬與軸比頻寬之影響 18
2-3-2 參數wa3對阻抗頻寬與軸比頻寬之影響 18
2-3-3 參數wa4對阻抗頻寬與軸比頻寬之影響 19
2-3-4 參數la2對阻抗頻寬與軸比頻寬之影響 19
2-3-5 參數la3對阻抗頻寬與軸比頻寬之影響 19
2-4 模擬與量測結果 25
2-5 結論分析 31
第三章 應用於Ka頻段之圓極化背腔式孔徑天線設計與分析 32
3-1 簡介 32
3-1-1 背腔反射板概述 32
3-2 應用於Ka頻段之圓極化背腔式孔徑天線初期設計 33
3-3 天線調整機制與參數分析 43
3-3-1 參數wc1對阻抗頻寬與軸比頻寬之影響 43
3-3-2 參數wc3對阻抗頻寬與軸比頻寬之影響 43
3-3-3 參數wc4對阻抗頻寬與軸比頻寬之影響 44
3-3-4 參數lc3對阻抗頻寬與軸比頻寬之影響 44
3-3-5 參數lc4對阻抗頻寬與軸比頻寬之影響 44
3-4 模擬與量測結果 50
3-5 結論分析 57
第四章 應用於Ka頻段之圓極化背腔式孔徑天線優化厚度設計與分析 58
4-1 簡介 58
4-2 應用於Ka頻段之圓極化背腔式孔徑天線優化厚度設計 58
4-3 天線調整機制與參數分析 69
4-3-1 參數wc1對阻抗頻寬與軸比頻寬之影響 69
4-3-2 參數wc3對阻抗頻寬與軸比頻寬之影響 69
4-3-3 參數lc2對阻抗頻寬與軸比頻寬之影響 70
4-3-4 參數lc3對阻抗頻寬與軸比頻寬之影響 70
4-3-5 參數ls3對阻抗頻寬與軸比頻寬之影響 70
4-4 模擬與量測結果 76
4-5 結論分析 84
第五章 結論 85
參考文獻 86參考文獻 [1] Microwave Journal. Is millimeter wave technology future of wireless communications?(2017).Retrieved from https://www.microwavejournal.com/blogs/25-5g/post/28775-is-millimeter-wave-technology-future-of-wireless-communications.
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[14] 蘇晓莉,「背腔天線相位中心的分析计算」,2009年全國天線年會論文集(下),230-232頁,2009年10月。指導教授 丘增杰(Tsen-Chieh Chiu) 審核日期 2021-7-20 推文 plurk
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