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研究生:墨家揚
研究生(外文):Chia-Yang Mo
論文名稱:無線通訊用之多頻帶雙埠天線
論文名稱(外文):Dual-Port Multi-Band Antennas for Wireless Communications
指導教授:鄭瑞清
指導教授(外文):Jui-Ching Cheng
學位類別:碩士
校院名稱:長庚大學
系所名稱:電子工程研究所
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:2007
畢業學年度:95
語文別:英文
論文頁數:82
中文關鍵詞:多頻帶雙埠天線無線通訊
外文關鍵詞:Multi-BandDual-PortAntennaWireless Communication
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本論文呈現兩種天線設計實現操作於802.11a/b/g、WiMAX頻段之多輸出埠多頻平面天線。其一為一低頻天線中間鏤空並嵌入另一高頻天線位於印刷電路板之另一側,達到多頻段操作的訴求。此外,於天線本體內加入嵌入式殘段與短路金屬,不但達到阻抗匹配的效果,更進一步縮小天線面積至28.2 mm × 21.4 mm。其二為整合平面天線與孔槽天線以達到多頻段操作的訴求。同時,曲折兩天線的輻射元件並加入電容電感性的嵌入式結構,不但達到阻抗匹配的效果,更進一步縮小天線面積至20 mm × 21.5 mm。此兩種天線於各操作頻段之內,皆擁有足夠的頻寬、全向性的輻射場型。
This thesis presents two designs of dual-port tri-band antennas which cover 802.11a/b/g and WiMAX at the same time. The first one is built by evacuating the center part of a slot antenna and inserting another one into the blanked area to form a tri-band antenna with separate input ports for IEEE 802.11a/b/g and WiMAX operation. Meanwhile, by inserting embedded lumped elements and shorted slot metal, good impendence match and size reduction are achieved simultaneously. The antennas are fabricated on an FR4 PCB with a size of only 28.2 × 21.4 mm2. The isolation between the two antennas is better than 11 dB. Peak gains at lower, middle and upper bands are of 0.8, 2.9 and 3.4 dBi, respectively. Omnidirectional radiation patterns and good in-band gain are also achieved.
The second one is built by integrating a planar inverted-F antenna and a slot line antenna to form a tri-band antenna with separate input ports for IEEE 802.11a/b/g and WiMAX operation. Moreover, good impendence match and compact size are obtained by meandering each radiating element of the antenna and inserting capacitive or inductive lump elements. The antennas are fabricated on an FR4 PCB with a size of only 20 × 21.5 mm2. The isolation between the two antennas is better than 11 dB. Peak gains at lower, middle and upper bands are of 1.8, 6.8 and 3.7 dBi, respectively. Omnidirectional radiation patterns and good in-band gain are also achieved.
指導教授推薦書…………………………………………………………
口試委員會審定書………………………………………………………
授權書……………………………………………………………….... iii
致謝………………………………………………………………........ iv
中文摘要……………………………………………………………… v
English Abstract..................................................................................... vi
Catalog………………………………………………………………… x
Figure List…………………………………………………………….. ix
Table List……………………………………………………………… xiv
Chapter One Introduction…………………………………………. ..1
1.1 Motivation and Literature Survey…………………..... 1
1.2 Chapter Outlines……………………………………… 3
Chapter Two Dual-Port Tri-Band CPW-fed Slot Antennas……….... 4
2.1 Introduction……………………………………………….. 4
2.2 Center-blanked CPW-fed Slot Antenna…………………... 5
2.3 Miniaturized CPW-fed Slot Antenna with Embedded Lump Elements and Shorted Slot Metal………………………... 8
2.4 Dual-port Tri-band coplanar waveguide fed slot antennas. 10
2.5 Conclusions………………………………………………. 14
Chapter Three Dual-port, Multi-band Antennas with Meandered Planar Inverted-F Antenna, Slot Line Antenna and Monopole Antenna……………………………………………… 33
3.1 Introduction………………………………………………. 33
3.2 Motivation………………………………………………... 34
3.3 Planar Inverted-F Antenna (PIFA)……………………….. 35
3.4 Slot Line Antenna………………………………………… 37
3.5 Dual-Port, Tri-Band Antennas for 802.11a/b/g and WiMAX...
………………………………………………………………… 38
3.6 Dual-Port, Multi-Band Antenna for GSM and 802.11a/b/g….
………………………………………………………………… 44
3.7 Conclusion………………………………………………... 46
Chapter Four Conclusion…………………………………………… 78
Reference………………………………………………………………. 79
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