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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 許博文 | |
dc.contributor.author | Po-Hsiang Wang | en |
dc.contributor.author | 王柏翔 | zh_TW |
dc.date.accessioned | 2021-06-13T16:34:54Z | - |
dc.date.available | 2006-07-13 | |
dc.date.copyright | 2005-07-13 | |
dc.date.issued | 2005 | |
dc.date.submitted | 2005-07-08 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38482 | - |
dc.description.abstract | 隨著無線個人區域網路的盛行,許多相關技術也隨之而蓬勃而生,其中最值得注意的就是超寬頻系統的發展。2002年五月,美國聯邦通訊委員會制訂了超寬頻系統的頻帶為3.1 GHz到10.6 GHz,並重新定義超寬頻信號。因為很大的頻寬,超寬頻系統可達到許多傳統窄頻系統所沒有的優點。
設計適合超寬頻系統的天線是一個很具挑戰性的領域。在這篇論文中,我們使用共面波導饋入機制設計了一種對數週期開槽天線,它具有非常大的頻寬,適合使用於超寬頻的系統之中。我們設計的天線在超寬頻系統的頻寬內有很穩定且平坦的天線增益頻率響應,同時也有很小的尺寸。為了要避免跟現有的無線區域網路系統頻帶重疊而產生干擾,我們在所設計的超寬頻天線上增加了一小片金屬而產生了擁有帶拒特性的超寬頻天線。我們把設計的天線的實驗結果跟特性做了一番完整的研究與探討。 | zh_TW |
dc.description.abstract | With the recent intensive development of the wireless personal area network (WPAN), several technologies have been introduced to fulfill the needs of WPAN. One of the most attractive technologies for WPAN is the ultra-wideband (UWB) system. In 2002, The Federal Communications Committees (FCC) had allocated the 3.1 to 10.6 GHz band for the UWB system. Because of the ultra wide bandwidth, there are many advantages exist in the UWB system that can not be achieved in the traditional narrowband systems.
Designing an antenna for the UWB system is quite a challenge for the antenna designers. In this thesis, we design a novel coplanar waveguide-fed log-periodic slot antenna which possesses a very wideband performance and can be used in the UWB system. The antenna has a broadside pattern, a flat gain response between the allocated UWB spectrum, and a quite small size. In order to prevent the unwanted interferences with the present wireless local area network (WLAN), additional metal strips are added to the designed UWB slot antenna and a band-notched characteristic is achieved. The experimental results are introduced and the behavior of this antenna is thoroughly investigated and discussed. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T16:34:54Z (GMT). No. of bitstreams: 1 ntu-94-R92942057-1.pdf: 1964160 bytes, checksum: 439ba6b1d7b6f0f08578be78b2d04e19 (MD5) Previous issue date: 2005 | en |
dc.description.tableofcontents | Chapter 1. Introduction…………………………………………......1
1.1 Motivation………………...…………………………………………………...................1 1.2 Literature Survey…….… ……………………………………………………....2 1.3 Chapter Outlines……………………………………………………………... .5 Chapter 2. Frequency Independent Antenna…….........................................7 2.1 Basic Principles and General Formulas……………….……………………..............7 2.2 Log-periodic element….…………………………………………………….... …9 2.3 Wire –type Log-periodic Antenna…………………………….…………..........10 2.4 Coplanar Waveguide………………………………………………………..........................11 Chapter 3. CPW-fed Log-periodic Slot Antenna...…………............................15 3.1 CPW-fed Circular Log-periodic Slot Antenna…………………………….......................15 3.1.1 Geometry……………………………………….…………………...............................15 3.1.2 Numerical and Experimental Results………………………………..................16 3.1.3 Design Guideline…………………………………………………..... ..17 3.2 CPW-fed Triangular Log-periodic Slot Antenna…………………………............................17 3.2.1 Geometry……………………………………….…………………...............................17 3.2.2 Numerical and Experimental Results………………………………..................18 3.2.3 Design Guideline…………………………………………………..... ..18 3.3 A Brief Comparison of the Two Structures………………………...………...........20 3.4 Summary…………………………………………………………………………..20 Chapter 4. CPW-fed UWB Antenna……………………..…...……………….41 4.1 Geometry…………………………….….……………………...……….......................41 4.2 Numerical and Experimental Results……………………………….……....................42 4.3 Parameter Study…………………………………………………………………………...43 4.3.1 The Common Ratio τ…..……………………………………….………43 4.3.2 The Number of the Tooth Elements N………………………….….. ……………..44 4.3.3 The Taper Transition……………………………………….………...............44 4.3.2 The Width of the Spindle h…………………………………….….. ………………...……44 4.4 Summary…………………………………………………………………………..45 Chapter 5. CPW-fed UWB Antenna with a Band-notched Characteristic………………………….………………………….....63 5.1 Geometry…………………………….….………………………….……...........................................63 5.2 Numerical and Experimental Results……………………………………................................64 5.3 Summary…………………………………………………………………………..65 Chapter 6. Conclusions…………………….……………………..................77 References………………………………………………….………........79 | |
dc.language.iso | en | |
dc.title | 共面波導饋入超寬頻對數週期天線 | zh_TW |
dc.title | Coplanar Waveguide Fed Log-periodic Slot Antenna for Ultra-wideband Applications | en |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 江簡富,張道治,林怡成,張知難 | |
dc.subject.keyword | 共面波導,超寬頻,天線, | zh_TW |
dc.subject.keyword | coplanar waveguide,ultra-wideband,antenna, | en |
dc.relation.page | 84 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-07-08 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
顯示於系所單位: | 電信工程學研究所 |
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