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研究生:陳建文
研究生(外文):Jian-Wun Chen
論文名稱:高阻抗結構於手機天線之應用
論文名稱(外文):Utilizing High Impedance Surfaces to Mobile Phone Antenna
指導教授:林明星林明星引用關係
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電機工程系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:99
中文關鍵詞:微帶線單極天線高阻抗結構共平面波導之底部無接地面共平面波導之底部有接地面平面
外文關鍵詞:Coplanar Waveguide With Ground PlaneCoplanar Waveguide With no Ground PlaneMicrostripHigh Impedance SurfacePlanar Monopole Antenna
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近幾年來,無線通訊技術快速發展使得手機需求量逐年增加,在現有手機市場激烈競爭下,各家電信業者無不提升手機的通訊品質與功能,舉凡影音、簡訊、網路…等功能越來越多樣化,使得內部電路零組件越來越密集,衍生的輻射效果也越大,因此手機所造成的電磁輻射對人體的影響日漸受到人們所重視。
本論文主要研究高阻抗結構(High Impedance Surface,HIS)應用於手機天線,藉由高阻抗結構改善手機通訊品質並且降低電磁輻射對人體的影響。分別設計PCS頻段高阻抗結構和兩種平面單極天線,平面單極天線分別應用於IEEE 802.11b/g/a與應用於多頻帶(DCS/PCS/IEEE 802.11b/g),其中藉由探討三種不同微帶線饋入,並選擇其中特性最好的微帶線饋入至兩種不同頻段的平面單極天線,最後在將高阻抗結構與金屬板分別應用於平面單極天線、偶極天線,探討高阻抗結構對天線的影響。
In recent years, the rapid development of wireless-communication technology has increased the need for mobile phones. In the highly competitive mobile-phone market, suppliers have tried hard to improve the qualities of mobile phones. Because more and more functions are being implemented in a single mobile phone, circuit components tend to be more densely packed in a mobile phone. It is then expected that more radiation emissions (REs) may occur. Hence, the effects of mobile-phone generated REs on human bodies have received increasing attention.

This thesis investigates the effects of high-impedance surfaces on mobile-phone antennas, hoping that high-impedance surfaces can improve the quality of mobile communications and reduce the impact of REs on human bodies. Two monopole antennas along with the corresponding high-impedance surfaces have been designed in this thesis, one covering the 802.11b/g/a bands and the other enclosing the DCS/PCS/802.11b/g bands. Three different feeding structures are numerically studied and only one of them that has the best performance is chosen to feed the two fabricated antennas. Finally, the effects of the high-impedance surfaces on the antenna characteristics are discussed.
第一章 緒論
1-1 研究動機與目的﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 1
1-2 文獻回顧 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒2
1-3 論文架構 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒4
第二章 平面單極天線設計
2-1 天線理論與介紹﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 5
2-2 微帶線設計 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒13
2-3 共平面波導之底部無接地面設計 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒17
2-4 共平面波導之底部有接地面設計 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒21
2-5 平面單極天線設計應用於IEEE 802.11b/g/a﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 23
2-6 平面單極天線設計應用於多頻帶﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 31
第三章 量測結果與討論
3-1 微帶線特性量測 ﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒37
3-2 共平面波導之底部無接地面特性量測﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 39
3-3 共平面波導之底部有接地面特性量測﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 41
3-4 平面單極天線應用於IEEE 802.11b/g/a特性量測﹒﹒﹒﹒﹒﹒﹒﹒ 43
3-5 平面單極天線應用於多頻帶特性量測﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 48
第四章 高阻抗結構
4-1 高阻抗結構基本概念﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 53
4-1.1 LC等效電路﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒54
4-1.2 複數阻抗的表面反射特性﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒56
4-2 高阻抗結構設計與模擬﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 58
4-2.1 反射相位校正的探討﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒60
4-2.2 應用於PCS頻段的週期性元件設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 61
4-3 高阻抗結構特性量测﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 63
第五章 高阻抗結構於天線上之應用
5-1 金屬對天線的影響﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 66
5-1.1 金屬對平面單極天線應用於多頻帶的影響﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒66
5-1.2 金屬對偶極天線的影響﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒69
5-2 高阻抗結構對天線的影響﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 73
第六章 結論﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒ 81
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