許博文臺灣大學:電信工程學研究所李奇軒Lee, Chi-HsuanChi-HsuanLee2010-07-012018-07-052010-07-012018-07-052009U0001-0308200915034600http://ntur.lib.ntu.edu.tw//handle/246246/188259本論文提出三種開槽天線分別適合於雙極化、超寬頻、以及雙頻帶之應用。在第二章中，提出適用於寬頻雙極化應用的等腰三角形開槽天線。除了討論等腰三角形開槽天線的兩個基本的共振模態，也呈現實驗和模擬的結果，並加以討論。在第三章中，提出修改的共面波導饋入領結型開槽天線適用於超寬頻天線之應用。在共面波導饋入領結型開槽天線的末端加上一對摺疊型的開槽來延伸共振路徑，可使天線的頻寬增寬至足以滿足超寬頻天線之需求。第四章中，提出應用於雙頻帶操作的共面波導饋入領結型環型混合開槽天線以及其縮小化之設計。兩個天線都是由一個共面波導饋入之領結型天線和加在其尾端的環型開槽天線所形成。利用控制環型天線的周長以及領結型天線的斜邊長，天線的兩個共振頻率可以機近獨立的分別控制。Three kinds of slot antennas are proposed for dual-polarization, ultra-wideband, and dual-frequency applications in this dissertation. The isosceles triangular slot antenna is introduced in Chapter 2 for broadband dual-polarization applications. The two resonant modes of the antenna are demonstrated. The simulation and measurement results are also presented and discussed. The proposed antenna has wide impedance bandwidth, high isolation, and good radiation characteristics. In Chapter 3, the modified coplanar waveguide-fed bow-tie slot antenna is proposed for ultra-wideband applications. By adding a pair of meandered slot on the ends of the bow-tie slot, the bandwidth of the antenna can be broadened to cover the required bandwidth of the ultra-wideband applications. In Chapter 4, a coplanar waveguide-fed hybrid bow-tie/slot loop antenna and its miniaturized design are proposed for dual-frequency operation. Each of the antennas is composed of a coplanar waveguide-fed bow-tie slot and a slot loop loaded on the end of the bow-tie slot. The two resonant frequencies of the antenna can be controlled nearly independently by the circumference of the slot loop and the side length of the bow-tie slot, respectively.口試委員會審定書 i謝 iii要 vbstract viiontents ixist of Tables xiiist of Figures xiiihapter 1 Introduction 1.1 Motivation 1.2 Literature Survey 2.2.1 Diversity Antennas 2.2.2 Ultra-Wideband Antennas 6.2.3 Dual-Frequency Antennas 9.3 Contribution 12.4 Chapter Outlines 13.5 Abbreviations 14hapter 2 Isosceles Triangular Slot Antenna for Broadband Dual Polarization Applications 17.1 Introduction 17.2 Antenna Design 19.3 Simulation and Measurement Results 24.4 Conclusion 28hapter 3 Compact Modified Bow-Tie Slot Antenna Fed by CPW for Ultra-Wideband Applications 45.1 Introduction 46.2 Antenna Design 47.3 Simulation and Measurement Results 48.4 Experiment Results in Time-Domain 51.5 Conclusion 53hapter 4 CPW-Fed Hybrid Bow-Tie/Slot Loop Antenna for Dual Frequency Operation 67.1 Introduction 67.1 Antenna Design 69.3 Simulation and Measurement Results 70.4 Conclusion 71hapter 5 Summary and Future Works 87.1 Summary 87.2 Future Works 89eference 91ublication List of Chi-Hsuan Lee 1112087258 bytesapplication/pdfen-US開槽天線微帶天線雙極化超寬頻雙頻帶天線Slot antennasMicrostrip antennasDual polarizationUltra-wideband (UWB)Dual frequency antennasthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/188259/1/ntu-98-F94942006-1.pdf