本論文主要是有別於傳統應用於行動手機之PIFA架構提出適用於多頻手機之內藏式迴圈與槽孔天線設計。而在論文中所提出的迴圈天線，其主要關鍵技術在於利用一適當蜿蜒迴圈輻射體的機制來調整模態頻率比進而能滿足多頻操作的需求。就槽孔天線而言，不同於一般傳統槽孔天線二分之一波長的共振結構，本論文提出利用四分之一波長共振的單極槽孔天線，配合適當的槽孔位置與微帶線參數，使其能以佔據較小手機內部空間的尺寸下達成多頻操作。本論文也進一步分析使用者手部與頭部對迴圈天線特性的影響。從研究結果發現，當使用者手部與頭部非常靠近甚至是包覆到天線時，皆會對迴圈天線的三個共振模態，造成輻射效率大幅下降及輻射場型大幅扭曲變形的現象，無論是在非平衡式或是平衡式模態皆有相似結果。另外在輻射效率上，低頻GSM900頻段相對於高頻GSM1800/1900頻段會有較大的衰減量。

In this dissertation, different from the conventional PIFA structure, the novel internal loop and slot antennas suitable for multiband mobile phone application are proposed. The loop antennas here use the technique of meandering the loop pattern to control the frequency ratio of the three resonant loop modes, and then the multiband operation can be obtained. For the slot antenna, different from the conventional slot antenna operating in a half-wavelength, the monopole slots antenna operating in it’s quarter-wavelength mode are proposed. By properly adjusting the position of the monopole slot and the tuning stub of the microstrip feedline, the monopole slot antenna can achieve the multiband operation with a small occupied area in the mobile phone. In addition, the user’s hand and head effects on the loop antenna are also studied. The obtained results indicate that, when the user’s hand and head is close to or cover a certain portion of the antenna, large decrease in the antenna’s radiation efficiency and great distortion in the antenna’s radiation pattern will occur for all the three excited resonant modes of the loop antenna, no matter the unbalanced or balanced modes. Further, the efficiency drops caused by the user’s hand and head over the GSM900 band are much larger than that over the GSM1800/1900 bands.

文字目錄i
圖形目錄iv
第一章 序論 (Introduction)1
1.1 研究動機1
1.2 文獻導覽2
1.3 論文提要3
第二章 多頻內藏式蜿蜒迴圈天線設計 (Internal Multiband Meandered Loop Antenna)5
2.1 天線設計與原理5
2.2 實驗結果與模擬分析8
2.3 心得與討論21
第三章 應用於小尺寸行動通訊設備之多頻迴圈天線設計 (Internal Multiband Loop Antenna for Small-size Mobile Device)22
3.1 天線設計與原理22
3.2 實驗結果與模擬分析25
3.3 心得與討論36
第四章 多頻印刷式單極槽孔天線設計 (Printed Multiband Monopole Slot Antenna)37
4.1 天線設計與原理38
4.2 實驗結果與模擬分析40
4.3 心得與討論56
第五章 應用於摺疊手機之多頻印刷式單極槽孔天線設計 (Printed Multiband Monopole Slot Antenna for Folder-type Mobile Phone)57
5.1 天線設計與原理58
5.2 實驗結果與模擬分析60
5.3 心得與討論72
第六章 多頻混合式天線設計 (Internal Multiband Hybrid Antenna)73
6.1 天線設計與原理73
6.2 實驗結果與模擬分析76
6.3 心得與討論84
第七章 使用者手部與頭部對於內藏式迴圈手機天線之影響 (User’s Hand and Head Effects on Internal Loop Mobile Phone Antenna)85
7.1實驗設計與模型建立86
7.2 實驗結果與模擬分析90
7.3 心得與討論104
第八章 結論 (Conclusions)105
參考文獻 (References)107
論文著作表 (Publication List)111

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