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標題: | 利用電磁能隙結構之慢速波特性設計縮小化微帶天線 Microstrip Antenna Miniaturization Design Using Slow Wave Property of EBG Structure |
作者: | Ya-Shin Chen 陳雅欣 |
指導教授: | 吳宗霖(Tzong-Lin Wu) |
關鍵字: | 微帶天線,電磁能隙結構,縮小化, Microstrip antenna,EBG structure,miniaturization,size reduction, |
出版年 : | 2009 |
學位: | 碩士 |
摘要: | 在無線通訊系統中,我們主要依賴天線來完成信號傳送與接收的作業。然而在現今科技發展快速的趨勢下,可攜式電子產品在無線通訊市場上出現的頻率也愈來愈高。其中有些產品的操作頻率是屬於較低的頻帶範圍內,例如使用802.11b和802.11g規格的無線區域網路、Bluetooth藍芽傳輸系統以及GSM全球行動通訊系統。為了使天線能夠與可攜式電子通訊產品結合,我們提出了適用於微帶天線的縮小化設計方法。微帶天線有許多優點適合製作於通訊產品內,但是由於其共振機制為尺寸需大約等於二分之一波長的限制,較不適合用於低頻系統中。此篇論文所提出的方法為在微帶天線下放置有限個數的電磁能隙結構來達到縮小化的目的。模擬結果證明加入此結構後的天線仍然保有原來的特性。除此之外,我們亦單純針對電磁能隙結構的各種參數進行分析與討論,並且為此提供了設計微小化天線的程序。最後,我們將比較一般微帶天線和縮小化天線的效能。這些將在模擬與實作量測中呈現。 In wireless communication systems the signal transmission always relies on antennas. With the advance in technology nowadays, the appearances of miniaturized electronic products are more frequent. Most of these communication products are operating at lower frequency band such as WLAN which uses the specification of 802.11b and 802.11g, Bluetooth system as well as GSM900 are operating at lower frequency band below a few GHz. In order to integrate with miniaturized wireless devices, we have proposed an EBG integrated patch antenna for reducing antenna size. With numerous advantages, the conventional microstrip antennas can be employed in many devices but are not proper for compact systems which have low operation frequency. The good radiation property of a patch antenna integrated with EBG structure on a dielectric slab can still be maintained. The simulation and measurement have been developed for verification. Furthermore, we have an analysis about EBG parameters and propose a design procedure for better EBG patch antenna design. The comparisons between a conventional and EBG patch antenna have also discussed in this thesis. The overall performance is validated in the simulation and measurement. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43157 |
全文授權: | 有償授權 |
顯示於系所單位: | 電機工程學系 |
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ntu-98-1.pdf 目前未授權公開取用 | 2.13 MB | Adobe PDF |
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