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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/23666
標題: | 印刷電路板柱狀漏波天線之研製 Design and Implementation of Cylindrical Leaky-wave Antennas with PCB Substrates |
作者: | Yao-Wen Hsu 許耀文 |
指導教授: | 林怡成(Yi-Cheng Lin) |
關鍵字: | 漏波天線,部分反射面,高增益天線, Leaky wave,Partially reflected surface(PRS),high gain antenna, |
出版年 : | 2011 |
學位: | 碩士 |
摘要: | 本篇論文提出一種新型高指向性之部分反射面(partially reflective surface)漏波線。此單一饋入的天線是設計和製作在印刷電路板(PCB)上。利用圓形平板天線(patch antenna)作饋入,此天線在上層覆蓋有在徑向和側向具週期性分割之部分反射面。在中心頻率5GHz 邊射(broadside)方向增益有14.8dB。另一稍作修改之設計由一圓形極化的平板天線饋入,可產生11dB 邊射方向增益與20%之3dB軸長比(axial ratio)頻寬。此種天線可利用垂直嵌入和水平嵌入之片狀金屬達到縮小化,雖然增益衰減約3dB,但與原設計相比面積可縮小約60%。最後,本文利用圓柱傳輸線方程式提出一等效電路模型,計算柱面波之傳播係數及遠場場形。此模型所得之結果與全波模擬的結果呈現出相當好的一致性。 This thesis presents a new type of partially reflective surface (PRS) antennas for high gain applications. This single-fed antenna was designed and fabricated with Printed Circuit Board(PCB) technology. The antenna was fed by a patch and covered by a PRS which consist of periodic partitions in radical and lateral directions. A broadside gain of 14.8dB was obtained at the center frequency 5GHz. Another slightly modified design was fed by a circularly polarized patch generating 11dB broadside gain and 20% axial ratio bandwidth. The antenna could be miniaturized with embedded vertical walls and horizontal pads, the maximum broadside gain was dropped by around 3dB but the size reduction is 60% compared to the original design. Finally, an equivalent circuit model had been proposed by employing cylindrical transmission line equations. The wave number of the cylindrical leaky wave had been calculated and the far field patterns were predicted. The presented model achieved a very good consistency with the full wave simulated results. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/23666 |
全文授權: | 未授權 |
顯示於系所單位: | 電信工程學研究所 |
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檔案 | 大小 | 格式 | |
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ntu-100-1.pdf 目前未授權公開取用 | 6.51 MB | Adobe PDF |
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