基於慢波結構之槽孔天線微型化

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姓名

呂曉涵(Xiao-Han Lu) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

基於慢波結構之槽孔天線微型化
(Miniaturization of Slot Antennas Using Slow Wave Structures)

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至系統瀏覽論文 (2027-9-23以後開放)

摘要(中)

本論文將會利用慢波結構和等效電路模型的概念將槽孔天線做縮小化。在第一部分會先將天線設計在ISM頻段內，利用慢波結構具有較大傳播常數的特性，來達到天線縮小化的目的，並且結合天線等效電路LC諧振的觀念，利用負載形成的等效電容、電感來達到更低的諧振頻率，進而達到更微型的尺寸，並在最後成功設計出尺寸僅有0.14λ0x 0.04λ0的半導波波長共振的槽孔天線。接著再利用表面等效定理和對偶定理，將單極天線演進為四分之一導波波長共振的槽孔天線，尺寸更縮小至0.061λ0×0.04λ0。最後再利用巴特勒矩陣將其作成可切換波束的1x4天線陣列，並討論縮小化後的槽孔天線組成的天線陣列雖然增益較低，但相較於傳統的槽孔天線陣列具有較佳的隔離度，縮小化槽孔天線組成的天線陣列隔離度可以達到-20 dB左右。第二部分會基於ISM頻帶的縮小化槽孔天線為原型，將工作頻帶提高至毫米波28 GHz的頻段，由於製程對線寬線距限制，槽孔天線經縮小化後的尺寸為0.14λ0 x 0.09λ0，也將其做成可切換波束的1x4天線陣列，並且達到8.7 dBi 的增益。

摘要(英)

In this paper, a miniaturized design of a microstrip-fed slot antenna is presented. We reduce the slot antenna size using slow-wave structures and equivalent circuit models. In the first part, the antenna will be designed to resonate at 2.45 GHz in the ISM band. Next, we use the characteristic of slow-wave structure with a larger phase constant to achieve the purpose of miniaturizing the antenna. In order to achieve a smaller size, we design a load in a slot antenna based on the concept of LC circuits, which is formed with equivalent capacitance and inductance. In the end, a half-wavelength slot antenna with a dimension of 0.14λ0 x 0.04λ0 has been successfully designed. Then, using the surface equivalence theorem and the dual theorem, the monopole antenna can be evolved into a quarter-wavelength slot antenna. Moreover, the quarter-wavelength slot antenna size has been reduced to 0.061λ0 × 0.04λ0. Finally, we use the butler matrix and miniaturized slot antennas to make a beam forming 1x4 antenna array. Additionally, we discuss the antenna array that uses miniaturized slot antennas, which has a lower gain, but better isolation than traditional slot antenna arrays. The isolation between the antenna array which is composed of miniaturized slot antennas can achieve about -20 dB. In the second part, we design a slot antenna based on the miniaturized slot antenna in the ISM band and increase the operating frequency to 28 GHz mmWave. Due to limitations of the process on line width, the slot antenna after miniaturization measures 0.14λ0 x 0.09λ0. And we also make into a beam forming 1x4 antenna array. Finally, the mmWave antenna array achieves a gain of 8.7 dBi.

關鍵字(中)

★ 槽孔天線
★ 縮小化
★ 毫米波
★ 慢波結構
★ 天線陣列

關鍵字(英)

★ slot antenna
★ miniaturization
★ millimeter wave
★ slow-wave structure
★ antenna array

論文目次

摘要 II
Abstract III
誌謝 IV
目錄 V
圖目錄 VII
表目錄 XVI
第一章緒論 1
1-1 研究動機與背景 1
1-2 文獻回顧 2
1-3 論文架構 3
第二章微帶線饋入之槽孔天線 4
2-1 槽孔天線原理及特性 4
2-1-1表面等效定理和對偶定理 4
2-1-2槽孔天線和偶極天線 6
2-2 縮小化槽孔天線的原理及驗證 8
2-2-1慢波結構 8
2-2-2週期性結構理論分析 10
2-2-3週期性結構理論驗證 13
2-2-4週期性結構演變至天線之原理驗證 19
2-3 具有負載的開槽傳輸線的等效電路模型 24
2-4 二分之一波長共振的縮小化槽孔天線設計 27
2-5 四分之一波長共振的縮小化槽孔天線設計 38
2-6 縮小化天線比較和參考論文比較 45
第三章天線陣列 48
3-1 天線陣列 48
3-2 巴特勒矩陣 51
3-2-190度相移分波耦合器 53
3-2-2功率交叉耦合器原理 56
3-3 4x4巴特勒矩陣設計 58
3-3-1巴特勒矩陣陣列因子比較 58
3-3- 巴特勒矩陣模擬 61
3-4 1x4槽孔天線陣列 69
3-5 傳統槽孔天線陣列和縮小化槽孔天線單元組成的天線陣列的比較 86
第四章毫米波(28 GHz)天線陣列 91
4-1 毫米波槽孔天線 91
4-2 毫米波頻段的巴特勒矩陣 102
4-3 毫米波頻段天線陣列 108
第五章結論 123
參考文獻 124
附錄一 : SMA862K-0000接頭規格 127
附錄二 : K8400A-0000接頭規格 129

參考文獻

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指導教授

歐陽良昱(Liang-Yu Ou Yang)

審核日期

2022-9-26

推文