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研究生:許溢文
論文名稱:應用於全球超高頻頻帶無線射頻辨識讀取器之圓極化天線設計
論文名稱(外文):Circularly Polarized Patch Antennas Design for Universal UHF RFID Reader Applications
指導教授:沈昭元
口試委員:羅鈞壎韓端勇
口試日期:2014-06-20
學位類別:碩士
校院名稱:逢甲大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:中文
論文頁數:66
中文關鍵詞:圓極化全球UHF頻帶RFID讀取器軸比貼片天線埋入槽縫寄生貼片
外文關鍵詞:circular polarizationuniversal UHF bandRFID antennaaxial ratiopatch antennaslits loadedparasitic patch
相關次數:
  • 被引用被引用:0
  • 點閱點閱:243
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  • 下載下載:9
  • 收藏至我的研究室書目清單書目收藏:0
本論文提出兩支應用在無線射頻辨識系統(Radio Frequency Identification,RFID)讀取器的天線設計,提出天線的主要設計架構可分為L形接地面以及輻射元件。
首先,提出第一支天線設計是利用埋入雙截角擾動元件於矩形貼片中,使天線激發0.876 GHz的低頻圓極化頻率,為了額外激發0.976 GHz的高頻圓極化頻率,本論文提出一新型技術——埋入多槽縫結構於雙截角輻射面內,藉由結合兩個圓極化頻率可達到寬頻圓極化輻射特性。提出天線的量測10-dB阻抗頻寬與3-dB圓極化頻寬分別為48.6% (0.685–1.125 GHz) 及16.5% (0.836–0.986 GHz),最大增益與效率則分別為8.6 dBic和98.8%,天線整體尺寸為250 × 250 × 60 mm3。
接下來,第二支天線設計是利用埋入一對notch擾動結構於圓形貼片(主輻射面)中,此輻射面能夠產生0.86 GHz的低頻圓極化頻率,再藉由埋入寄生貼片於主輻射面旁使得天線額外產生0.95 GHz的高頻圓極化頻率,如同第一支提出天線,兩圓極化頻率會互相結合達到寬頻圓極化的特性。此外,相較於文獻[24]之天線設計,提出天線所埋入的寄生元件面積只會使天線輻射面總面積額外增加約莫主輻射面的7.8%。量測10-dB阻抗頻寬為31.7% (0.835–1.15 GHz),3-dB圓極化頻寬達14.3% (0.839–0.968 GHz),最大增益與效率分別為7.66 dBic和98%。提出天線尺寸僅有170 × 190 × 55 mm3。
本論文提出的兩支天線設計的操作頻帶皆能夠完全涵蓋全球UHF (Ultra High Frequency,0.84–0.96 GHz)頻帶之範圍,量測天線最大讀取距離皆達到5.0 m以上,並且呈現良好的圓極化輻射特性,非常適合應用在固定式RFID讀取器天線上。
摘 要 i
Abstract iii
目 錄 v
圖目錄 vii
表目錄 x
縮寫及符號對照表 xi
第一章 緒論 1
1.1 前言 1
1.2 文獻探討 3
1.3 內容提要 6
第二章 應用於RFID系統全球UHF頻帶之多槽縫寬頻圓極化貼片天線設計 7
2.1 概述 7
2.2 天線結構介紹 7
2.3 天線設計流程與參數分析 10
2.3.1 W1參數模擬分析 14
2.3.2 L1參數模擬分析 16
2.3.3 L2參數模擬分析 18
2.3.4 c參數模擬分析 20
2.3.5 Wg參數模擬分析 22
2.3.6 G參數模擬分析 24
2.4 結果與討論 27
2.5 讀取距離之量測 32
第三章 具有寄生貼片之圓極化全球UHF頻帶RFID讀取器天線設計 35
3.1 概述 35
3.2 天線結構介紹 35
3.3 天線設計流程與參數分析 38
3.3.1 R1參數模擬分析 42
3.3.2 R2參數模擬分析 44
3.3.3 g參數模擬分析 46
3.3.4 ϕ參數模擬分析 48
3.3.5 H參數模擬分析 50
3.4 結果與討論 53
3.5 讀取距離之量測 57
第四章 總結論 59
參考文獻 62
作者簡介 66
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