(3.236.118.225) 您好!臺灣時間:2021/05/16 10:52
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:徐立哲
研究生(外文):Li-Jhe Syu
論文名稱:共平面波導超寬頻天線之研究
論文名稱(外文):Study of CPW Ultra-Wideband Antennas
指導教授:陳立軒陳立軒引用關係林文寬林文寬引用關係
指導教授(外文):Lih-Shan ChenWen-Kuan Lin
學位類別:碩士
校院名稱:義守大學
系所名稱:電子工程學系
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:2016
畢業學年度:104
語文別:中文
論文頁數:101
中文關鍵詞:共平面波導超寬頻天線帶拒
外文關鍵詞:coplanar waveguideUWBantennanotch
相關次數:
  • 被引用被引用:0
  • 點閱點閱:201
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本論文提出具帶拒功能的超寬頻天線,所提出之天線架構除了滿足超寬頻天線規範的頻段(3.1 GHz-10.6 GHz)外,同時為了避免超寬頻天線與WLAN、X-band 衛星通信、ITU 8-GHz共存的頻段產生互相干擾,因此加入帶拒功能。本研究所提出之天線是使用FR4基板,且天線為共平面波導饋入,結構簡單。
共平面波導超寬頻天線是設計在介電常數為4.4的FR4基板上,基板尺寸為30×30×0.8mm3,天線的接地面連接,在上半部的接地面使用了斜角設計來達到良好的阻抗匹配,在斜角下方加入了階梯設計,可以使得7GHz-8GHz頻段的S11達到 -10dB以下,矩形貼片天線下半部的階梯設計是用來將10GHz的頻寬拉大到11GHz,而上半部的斜角設計是用來拉大4GHz的頻寬。帶拒功能則是利用在下方接地面所延伸出來的I形寄生元件與L形寄生元件,在5.5 GHz時,大部分的電流都被I形寄生元件所吸收,而在7.5 GHz時,大部分的電流都被L形寄生元件所吸收,因此產生帶拒功能。天線符合超寬頻天線的規格,加入寄生元件成功阻隔5.5 GHz與7.5 GHz的頻段,輻射場型呈現全向性的趨勢。模擬與實作的結果顯示天線具有穩定的輻射方向。

CPW ultra-wideband antennas with notch characteristics are investigated in this study. The proposed ultra-wideband antenna works in the frequency range of 3.1 GHz-10.6 GHz. To avoid the interference with WLAN、X-band satellite communication and ITU 8-GHz, the afore-mentioned frequency band are notched. CPW antennas with simple structures are fabricated on FR4substrate with dielectric constant of 4.4.
The ground plane of ultra-wideband monopole antenna is connected and a bevel in the upper half of the ground plane is proposed to achieve good impedance matching. An oblique angle ladder pattern is to reach a better impedance matching in the frequency range between 7-8GHz and the lower part of the rectangular patch is to widen the bandwidth of 10GHz to 11GHz. The upper half of the bevel design is to widen the bandwidth of 4GHz and bands of UWB antennas are notched by adding parasitic elements. The I-shaped and L-shaped parasitic elements below ground plane are proposed for band notch. The currents are absorbed by the I-shaped parasitic elements in the frequency of 5.5 GHz and are absorbed in the 7.5 GHz by the L-shaped parasitic elements. Simulated and measured results show good agreement.

摘要 I
Abstract II
致謝 III
目錄 IX
表目錄 XIV
第一章 序論 1
1-1 背景介紹 1
1-2 超寬頻(UWB)通訊系統介紹 3
1-3 論文章節提要 6
第二章 天線理論與設計 7
2-1 偶極天線原理 7
2-2 單極天線原理 11
2-3天線特性與參數 13
2-3-1天線增益 13
2-4共平面波導設計概要 15
2-4-1 50Ω傳輸線線寬的計算方式 15
2-4-2天線設計流程 17
2-5文獻探討 18
2-5-1超寬頻天線 18
第三章 共平面波導超寬頻天線設計 20
3-1 前言 20
3-2共平面波導單極天線設計 21
3-2-1 改變a段參數 24
3-2-2 接地面有無連結 26
3-2-3 接地面寬度改變 29
3-2-4 改變接地面上方接地面 33
3-2-5 改變輻射體下方 38
3-2-6 改變上方左右兩邊接地面 40
3-2-7 改變輻射體上方 45
3-2-8 改變接地面上方 50
3-2-9結果與討論 55
第四章 具帶拒功能的共平面波導超寬頻天線 62
4-1 前言 62
4-2 寄生元件擺放位置 63
4-3 I型寄生元件設計 64
4-3-1 改變I型寄生元件長度 66
4-3-2 改變I型寄生元件長度 67
4-3-3 寬度0.5mm與1mm比較 68
4-3-4 改變寄生元件與接地面之間距離 69
4-3-5 I型寄生元件電流分佈與電流方向圖 70
4-3-6 結果與討論 71
4-4 L型寄生元件設計 76
4-4-1 改變L型寄生元件長度 78
4-4-2 改變L型寄生元件寬度 79
4-4-3 改變L型寄生元件與接地面之間距離 80
4-4-4 L型寄生元件電流分佈與電流方向 81
4-4-5 結果與討論 82
4-5 結果與討論 87
第五章 結論 88
參考文獻 89

[1]http://pc-daily.blogspot.tw/2012/01/news-4g2012.html,通訊技術演進圖
[2]S. Y. Suh, W. L. Stutzman, and W. A. Davis, “A New Ultrawideband Printed Monopole Antenna: The Planar Inverted Cone Antenna (PICA),” IEEE Transactions on Antenna and Propagation, vol. 52, no. 5, pp. 1361-1365, 2004.
[3 J. Liang, C. C. Chiau, X. Chen, and C. G. Parini, “Study of a printed circular disc monopole antenna for UWB systems,” IEEE Transactions on Antenna and Propagation, vol. 53, no. 11, pp. 3500-3504, 2005.
[5]C. Y. Huang and W. C. Hsia, “Planar elliptical antenna for ultra- wideband communications,” Electronics Letters, vol. 40, no. 6, pp. 296-297, 2005.
[6]T. Yang and W. A. Davis, “Planar Half-Disk Antenna Structures for Ultra-Wideband Communications,” IEEE Antenna and Propagation Society International Symposium Digest, vol.3, pp. 2508-2511, June 2004.
[7] N. Fortino, G. Kossiavas, J. Y. Dauvignac, and R. Staraj, “Novel Antennas for Ultra-Wideband Communications,” Microwave and Optical Technology Letters, vol. 41, no. 3, pp. 166-169, 2004.
[8] D. H. Kwon and Y. Kim, “CPW-fed Planar Ultra-Wideband Antenna with Hexagonal Radiating Elements,” IEEE Antenna and Propagation Society International Symposium Digest, vol.3, pp. 2947-2950, June 2004.
[9]黃偉鈞,適用於超寬頻系統之印刷式共平面波導饋入單極天線 碩士論文,國立台北科技大學,2006。
[10] R. Chair, A. A. Kishk, and K. F. Lee, “Ultrawide-band Coplanar Waveguide-Fed Rectangular Slot Antenna,” IEEE Antennas andWireless Propagation Letters, vol. 3, no. 1, pp. 227-229, 2004.
[11] H. D. Chen, J. S. Chen, and J. N. Li, “Ultra-wideband square-slot antenna,” Microwave and Optical Technology Letters, vol. 48, no. 3, pp. 500-502, 2006.
[12] P. Li, J. Liang, and X. Chen, “Ultra-wideband elliptical slot antenna fed by tapered microstrip line with U-shaped tuning stub,” Microwave and Optical Technology Letters, vol. 47, no. 2, pp. 140-143, 2005.
[13] X. Qing, M. Y. W. Chia, and X. Wu, “Wide-slot Antenna for UWB Applications,” IEEE Antenna and Propagation Society International Symposium Digest, vol. 1, pp. 834-837, June 2003.
[14]T. G. Ma and C. H. Tseng, “An ultrawideband coplanar waveguide- fed tapered ring slot antenna,” IEEE Transactions on Antenna and Propagation, vol. 54, no. 4, pp. 1105-1110, 2006.
[15]Dang Trang Nguyen, Dong Hyun Lee, and Hyun Chang Park,“Very Compact Printed Triple Band-Notched UWB Antenna With Quarter-Wavelength Slots”, IEEE Antennas and Wireless Propagation Letters, vol. 11, , pp.411-114, 2012.
[16]Bing Li, Jingsong Hong, and Bingzhong Wang, “Switched Band-Notched UWB/Dual-Band WLAN Slot Antenna With Inverted S-Shaped Slots”, IEEE Antennas and Wireless Propagation Letters, vol. 11, pp.572-575, 2012.
[17]Jie Xu, Xiupu Zhang, and Ke Wu, “A Compact Disc UltrawideBand (UWB) Antenna With Quintuple Band Rejections”, IEEE Antennas and Wireless Propagation Letters, vol. 11, pp.1517-1520, 2012.
[18]D. O. Kim and C.Y. Kim, “CPW-fed ultra-wideband antenna with triple-band notch function”, Electronica Letters , vol. 46 no. 18., pp.1246-1248, 2010.
[19]Abhishek Kumar and Dr. T. Shanmuganantham, “A CPW Fed Octagonal Patch UWB Antenna with WiMAX Band-Notched Characteristics”, IEEE International Conference on Information Communication and Embedded Systems, pp.1-5, 2014.

QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top