臺灣博碩士論文加值系統

本論文的研究內容主要針對阻抗頻寬可涵蓋於無線區域網路 2.4/5.2/5.8 GHz 三頻段之天線。本論文提出三款不同的結構天線設計，進行分析與討論。首先是單極天線，藉由調整兩微帶線長度參數，能輕易控制頻段的操作，且正反面兩路徑間的耦合可以改善其高低頻的頻寬及阻抗匹配。第二款單極天線，藉由調整兩路徑長度，可控制高頻與低頻頻率，並且利用兩路徑間的耦合關係，改善高頻頻寬。最後一種單極天線設計，是利用本校英文縮寫為構思，進而提出一款可涵蓋WLAN 三頻操作頻段之天線。以上三種天線設計，均能涵蓋 WLAN 系統操作。

In this paper, the purpose of printed antenna design is mainly for impedance bandwidth covering the 2.4/5.2/5.8 GHz triple-band for wireless LAN. We proposed three different antenna structure designs to analyze and discuss. Firstly, a monopole antenna can easily controlling bandwidth operation by adjusting two microstrip line lengths and the coupling between the two paths can improve its high and low frequency bandwidth and impedance matching. Secondly, a monopole antenna can control both the high frequency and low frequency, and the use of the coupling between the two paths to improve the high frequency bandwidth by adjusting the length of the two paths. Lastly, a design monopole antenna, is the use of the school abbreviation for the idea, and then put forward triple-band for WLAN band can cover the operation of the antenna. The above three antenna design, can cover WLAN system operation.

目 錄
頁次
文字目次 Ⅲ
圖形目次 Ⅴ
表格目次 Ⅶ
第一章 前言（Introduction）...1
1.1 研究背景及動機...1
1.2 文獻導覽...3
1.3 論文章節提要...4
第二章 應用於無線區域網路系統之雙倒L型耦合式單極天線設計
（Design of A Dual Inverted L-type Coupled Monopole Antenna for WLAN System）...5
2.1 概述...5
2.2 天線設計...6
2.3 模擬與實驗結果...7
2.4 分析與討論...17
第三章 應用於無線區域網路系統之8字型耦合式單極天線設計
（Design of An 8-type Coupled Monopole Antenna for WLAN System）...18
3.1 概述...18
3.2 天線設計...18
3.3 模擬與實驗結果...19
3.4 分析與討論...30
第四章 應用於無線區域網路系統之NKNU標幟單極天線設計
（Design of A NKNU Logo Type Monopole Antenna for WLAN System） 31
4.1 概述...31
4.2 天線設計...31
4.3 模擬與實驗結果...32
4.4 分析與討論...42
第五章 結論（Conclusions）...43
參考文獻（References）...45
圖 形 目 次
頁次
圖 2.1 基本的四分之波長單極天線之電流分佈圖。...6
圖 2.2 應用於無線區域網路之雙倒L型耦合式單極天線之幾何結構圖。...7
圖 2.3 應用於無線區域網路之雙倒L型耦合式單極天線之成品照片圖。(a)正面成品圖；(b)背面成品圖。...8
圖 2.4 應用於無線區域網路之雙倒L型耦合式單極天線之實測與模擬返回損失結果比較圖。...8
圖 2.5 應用於無線區域網路之雙倒L型耦合式單極天線之結構參數示意圖。...9
圖 2.6 應用於無線區域網路之雙倒L型耦合式單極天線對於參數L探討之模擬返回損失結果比較圖。...10
圖 2.7 應用於無線區域網路之雙倒L型耦合式單極天線對於參數W1探討之模擬返回損失結果比較圖。...11
圖 2.8 應用於無線區域網路之雙倒L型耦合式單極天線對於參數W2探討之模擬返回損失結果比較圖。...12
圖 2.9 應用於無線區域網路之雙倒L型耦合式單極天線之模擬表面電流分布圖。(a) fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...13
圖 2.10 應用於無線區域網路之雙倒L型耦合式單極天線之實測與模擬2D輻射場型結果比較圖。...14
圖 2.11 應用於無線區域網路之雙倒L型耦合式單極天線之模擬結果3D輻射場型圖。(a) fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...15
圖 2.12 應用於無線區域網路之雙倒L型耦合式單極天線之實測與模擬增益結果比較圖。(a)低頻；(b)高頻。...16
圖 3.1 應用於無線區域網路之8字型耦合式單極天線之幾何結構圖。...19
圖 3.2 應用於無線區域網路之8字型耦合式單極天線之成品照片圖。(a)正面成品圖 (b)背面成品圖。...20
圖 3.3 應用於無線區域網路之8字型耦合式單極天線之實測與模擬返回損失結果比較圖。...21
圖 3.4 應用於無線區域網路之8字型耦合式單極天線之幾何參數圖。...21
圖 3.5 應用於無線區域網路之8字型耦合式單極天線對於參數G1探討之模擬返回損失結果比較圖。...22
圖 3.6 應用於無線區域網路之8字型耦合式單極天線對於參數G2探討之模擬返回損失結果比較圖。...23
圖 3.7 應用於無線區域網路之8字型耦合式單極天線對於參數W1探討之模擬返回損失結果比較圖。...24
圖 3.8 應用於無線區域網路之8字型耦合式單極天線對於參數W2探討之模擬返回損失結果比較圖。...25
圖 3.9 應用於無線區域網路之8字型耦合式單極天線之模擬表面電流分布圖。(a)fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...26
圖 3.10 應用於無線區域網路之8字型耦合式單極天線之實測與模擬2D輻射場型比較圖。...27
圖 3.11 應用於無線區域網路之8字型耦合式單極天線之模擬結果3D輻射場型圖。(a) fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...28
圖 3.12 應用於無線區域網路之8字型耦合式單極天線之實測與模擬增益結果比較圖。(a)低頻；(b)高頻。...29
圖 4.1 應用於無線區域網路之NKNU標識單極天線之幾何結構圖。...32
圖 4.2 應用於無線區域網路之NKNU標識單極天線之成品照片圖。...33
圖 4.3 應用於無線區域網路之NKNU標識單極天線之實測與模擬返回損失結果比較圖。...33
圖 4.4 應用於無線區域網路之NKNU標識單極天線之幾何參數圖。...34
圖 4.5 應用於無線區域網路之NKNU標識單極天線對於參數L1探討之模擬返回損失結果比較圖。...34
圖 4.6 應用於無線區域網路之NKNU標識單極天線對於參數L2探討之模擬返回損失結果比較圖。...35
圖 4.7 應用於無線區域網路之NKNU標識單極天線對於參數W探討之模擬返回損失結果比較圖。...36
圖 4.8 應用於無線區域網路之NKNU標識單極天線之模擬表面電流分布圖。(a)fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...37
圖 4.9 應用於無線區域網路之NKNU標識單極天線之實測與模擬2D輻射場型比較圖。...39
圖 4.10 應用於無線區域網路之NKNU標識單極天線之模擬結果3D輻射場型圖。(a) fc = 2400 MHz；(b) fc = 5200 MHz；(c) fc = 5800 MHz。...40
圖 4.11 應用於無線區域網路之NKNU標識單極天線之實測與模擬增益結果比較圖。(a)低頻；(b)高頻。...41

表 格 目 次
頁次
表1 無線區域網路IEEE 802.11系列之規範標準。...2
表2 應用於無線區域網路系統之天線優缺點比較。...44

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