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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44344
標題: | 無線通訊應用之三角形開槽天線 Triangular-Shaped Slot Antennas for Wireless Communication Applications |
作者: | Chi-Hsuan Lee 李奇軒 |
指導教授: | 許博文 |
關鍵字: | 開槽天線,微帶天線,雙極化,超寬頻,雙頻帶天線, Slot antennas,Microstrip antennas,Dual polarization,Ultra-wideband (UWB),Dual frequency antennas, |
出版年 : | 2009 |
學位: | 博士 |
摘要: | 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. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44344 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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