本論文係針對四款微型化WLAN與WWAN天線來進行研究及設計，其適合內建於筆記型電腦中作相關應用。首先，第一款天線為操作於WLAN頻段之雙短路倒F天線，其工作原理主要為利用兩組曲折短路腳來控制輸入阻抗，以符合雙頻操作之需求。第二款WLAN天線乃基於耦合型單極天線來加以設計，運用耦合饋入的方式，將能量耦合至天線分支上，使其激發多組共振模態，藉以縮減天線體積及產生所需頻帶。另外，為了滿足筆記型電腦之WWAN應用功能，本論文亦研製第三款具耦合間隙結構之環形天線，透過天線本身的一倍波長模態與耦合間隙所激發之短路單極模態作結合，將可涵蓋GSM900/DCS/PCS/UMTS等多個系統頻帶，此架構亦具備近似全向性的輻射場型及良好的輻射效能。最後，第四款天線為應用於WLAN頻段之環形天線，工作原理與第三款天線相似，利用簡單之環形架構來產生雙頻共振模態。本論文所提出之四款天線不僅體積小且輻射效能佳，而基板亦使用廉價的FR4來搭配印刷電路板技術，故可有效降低成本和製程複雜度，並易於內建於筆記型電腦內，具有相當高之商業價值。
另一方面，本論文針對電腦連接器常用的通用匯流排USB3.0作完整分析，除了透過高頻電磁模擬軟體來分析連接器之阻抗特性，並採用時域反射儀加以量測驗證之，其模擬與實測結果之趨勢大致相符。最後，本文提出提高膠芯介電常數之方法，使連接器之阻抗符合規範標準。

This thesis proposes four kinds of miniature antennas to be embedded inside the laptop computers for WLAN and WWAN applications. The first design is about an inverted-F antenna (IFA) using a pair of shorted pins to adjust the input impedance, so that dual band operation for WLAN system can be satisfactorily attained. As to well reduce the antenna size and create the required frequency bands, a coupled monopole antenna having a multi-branch structure is therefore studied for WLAN applications, where the desirable resonant modes can be excited by coupling energy from the feed line to the branch. By employing a gap coupling structure, a loop-type antenna with nearly omni-directional coverage and good radiation performance has been developed as the third design suitable for WWAN operation. Two resonant modes in regard to one wavelength and quarter wavelength can be simultaneously implemented with our design to cover the GSM900/DCS/PCS/UMTS bands, which are also corresponding to the loop-type antenna mode and the shorted monopole antenna mode, respectively. The fourth antenna design based on a simple loop structure to implement dual band operation for WLAN system is thoroughly presented in this thesis as well, whose operating concept is also similar to the third design. These four antenna designs all feature not only a small size but also good radiation performance. Consequently, the proposed designs fabricated on FR4 substrate to lower the cost are well suitable for integration into the laptop computers for practical applications.
For USB 3.0 connector, on the other side, in this thesis an electromagnetic solver has been used to analyze the characteristic impedance and other electrical properties, and the experimental results are performed using the time-domain reflectometry (TDR). Good agreement between the simulated and measured results is obtained. Eventually, the thesis also investigates a manner to increase the dielectric constant of the insulator, so that the impedance standards can be well matched with our connector design.

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