本論文的內容針對於如何達到超寬頻提出新的方式與思維。希望藉由對這種新的方式，歸納出經由改變天線結構的參數，來抑制特定的頻帶的理論。

The content of this paper is aimed at how to achieve new ways and thinking to achieve ultra-wideband. It is hoped that by this new approach, the theory of suppressing a specific frequency band by changing the parameters of the antenna structure can be summarized.

文 字 目 次
頁次
文字目次 i
圖形目次 ii
第一章 緒論
1.1研究之背景及動機 1
1.2 文獻導覽 2
1.3 內容提要 2

第二章 鬱金香型超寬頻微帶天線設計
2.1 概述 4
2.2 天線設計 5
2.3 模擬結果 5
2.4 分析與討論 6
第三章 Ansoft HFSS軟體模擬設定
3.1 概述 21

第四章 結論 31
參考文獻 33




圖 形 目 次

圖2.1 鬱金香形超寬頻微帶天線之幾何結構圖………………………7
圖2.2 鬱金香形超寬頻微帶天線變動參數t時的電壓駐波比對頻率圖………………………………………………………………....8
圖2.3 鬱金香形超寬頻微帶天線變動參數w時的電壓駐波比對頻率圖………………………………………………………………....9
圖2.4 使用Ansoft HFSS模擬軟體，分析幅射金屬片與接地面之各別電流分佈圖…………………………………………………………...10
圖2.5 鬱金香形超寬頻微帶天線變動張角θ時的電壓駐波比對頻率圖………………………………………………………………..11
圖2.6 鬱金香形超寬頻微帶天線變動半徑r時的電壓駐波比對頻率圖………………………………………………………………..12
圖2.7 使用Ansoft HFSS模擬軟體，當張角為θ= 0度時之電流分佈圖………………………………………………………………..13
圖2.8 使用Ansoft HFSS模擬軟體，當張角為θ= 60度時之電流分佈圖………………………………………………………………..14
圖2.9 使用Ansoft HFSS模擬軟體，當張角為θ= 120度時之電流分佈………………………………………………………………..15
圖2.10 使用Ansoft HFSS模擬軟體，當張角為θ= 180度時之電流分佈圖……………………………………..……………………..16
圖2.11 使用Ansoft HFSS模擬軟體，當張角為θ= 240度時之電流分佈圖………………………………..…………………………..17
圖2.12 天線增益圖……………………………………………………18
圖2.13 天線於4.100GHZ時的遠場幅射場型…………..……………19
圖2.14 天線於8.200GHZ時的遠場幅射場型…………………..……20
圖3.1 先繪製接地面，點選紅色框，繪製尺寸15X25mm，在畫另一塊繪製尺寸3X1.5mm，點選藍色框兩塊相減………………21
圖3.2 點選紅色框，繪製介質基板FR4，尺寸32X25X0.8mm，點兩下藍色框，開啟圖3.3視窗……………………………………………22
圖3.3 選擇立方體材質FR4_epoxy…………………………………...22
圖3.4 建立一個1.5X16mm patch，在繪製一個半徑8.5mm的圓形patch，選取矩形和圓形patch，點選紅色框，將兩塊結合…………………………………………………..……………23
圖3.5 點選紅色框，將畫面轉到YZ面，建立一塊1.5X0.8mm的矩形，點選藍色框滑鼠右鍵，設定饋入電流源………………………23
圖3.6 將滑鼠移到矩形patch下方中心點位置(出現三角形符號)，設為饋入點起始座標，將滑鼠移到矩形patch上方中心點位置(出現三角形符號)點一下，即完成………………………………24
圖3.7 依照紅色框步驟，選取接地面與圓矩形，點滑鼠右鍵，設定Finite Conductivity，依照預設值，點選OK即可………………24
圖3.8 建立一個BOX，隨意畫一個，在標定其座標即可……………25
圖3.9 點選所建立的box，紅色框兩下，依序輸入藍色框部分的數值………………………………………………………………..25
圖3.10 設定Radaition，依照預設值按OK即可……………………26
圖3.11 中心頻率設定，按下紅色框按鈕，在跳出的視窗，依序輸入藍色框數值，最後按確定即可………………………………..26
圖3.12 模擬頻率範圍設定，按下紅色框按鈕，在跳出的視窗，依序輸入藍色框數值，最後按OK即可………………………….27
圖3.13 點選紅色框按鈕，由軟體自動驗證各項設定，若都正確，顯示如上………………………………………………………..27
圖3.14 點選紅色框按鈕，開始模擬………………………………..28
圖3.15 建立VSWR圖，按下New Report…………………………..29
圖3.16 VSWR範圍設定，紅色框按兩下，選擇Scaling頁面，Min數值輸入0，Max數值輸入6………………………………29
圖3.17 模擬結果……………………………………………………..30

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