臺灣博碩士論文加值系統

本論文在設計使用於4.9-5.0 GHz頻帶之戶內WiMAX四區段開關天線，此天線之原型設計是用來提供較高的增益於一指定區段。此外，天線的輻射波束利用電子控制操作於四個區段，每一個區段包含二個矩形微帶天線之陣列，並將微帶天線基板背面與接地面之間的空氣間距增高為3 mm，來達成高增益且寬頻的設計目標，然後利用一微波開關IC來選擇四個區段之一。

A four-sector switchable WiMAX antenna, for indoor use in the 4.9 -5.0 GHz frequency bands, is presented. The prototype antenna is designed to provide a higher gain in a specified sector region. Furthermore, the radiation beam is electronically steerable to provide space diversity in four different sectors. Each sector of this antenna includes an array of two rectangular microstrip patches. The air gap between the bottom substrate of microstrip patches and the ground plane is increased to 3 mm, which can aid in accomplishing a high-gain and wideband design goal. A solid-state microwave switch is used to select one of the four sectors.

第一章 緒論................................................... 1
第二章 微帶天線與陣列天線分析與製作........................... 3
2.1 微帶天線一般基本特性................................ 3
2.2 基本理論分析........................................ 8
2.3 考慮微帶線饋入之空腔模式理論........................ 11
2.4 矩形微帶天線設計與分析.............................. 13
2.5 陣列天線理論........................................ 17
2.6 1×2 微帶天線陣列實作與量測........................... 22
第三章 四區段切換式開關天線設計與製作.....................32
3.1 四區段切換式開關電路................................ 32
3.2 四區段切換式開關實際量測結果........................ 37
3.3 四區段切換式開關天線實作與量測...................... 42
第四章 結論................................................... 48
參考文獻 ....................................................... 49

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