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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林怡成 | |
dc.contributor.author | Kuo-Fong Hung | en |
dc.contributor.author | 洪國鋒 | zh_TW |
dc.date.accessioned | 2021-06-15T04:21:50Z | - |
dc.date.available | 2012-01-21 | |
dc.date.copyright | 2010-01-21 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-10-15 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45468 | - |
dc.description.abstract | 本論文提出一種新式寬頻圓極化天線架構及其陣列模組之整合設計與製作。該天線之設計概念為利用行進波激發金屬槽孔天線,使其達成寬頻圓極化之輻射效能,並且具有下列幾項特點︰
1)以平面的PCB 設計,適合低成本且大量生產。 2)由外部之微帶線饋入的設計,易與射頻電路及天線陣列饋入網路整合。 3)共振腔之設計,易整合於載具且有單向輻射及提高天線增益之優點。 4)具有寬頻之特性,包括阻抗、天線增益,以及軸長比。 5)電磁能隙架構之設計,可取代空氣共振腔,使得該天線更為縮小化。 由實作及測量結果顯示,該天線單元的效能頗佳,包括10-dB返回損失頻寬為28%,3-dB的軸長比頻寬約25%,以及天線增益大約6~8 dBi。接下來利用一個循序式的饋入網路將天線延伸至陣列模組,由實際製作量測結果驗證,該陣列天線可大幅增加效能,包括10-dB之返回損失頻寬優於70%,3-dB的軸長比頻寬大約為50%,天線最高增益提昇至11 dBi及半功率頻寬增加為40%左右。該天線陣列亦在毫米波頻率進行實作驗證,可應用於高速率數位傳輸的寬頻無線收發系統。 本論文亦利用電磁能隙架構取代空氣共振腔,以作為天線之阻抗匹配及反射面,獲得具有單方向之輻射場型,並可使得該天線更為縮小化。本論文證實該天線之總高度可從10.6毫米降為2.2毫米,大幅降低80%。最後,我們整合天線於SoP之X-頻段雷達技術收發系統模組,應用於短距離移動目標距離與方位之探測。全部射頻元件與天線皆可整合於同一LTCC模組上且總面積為35 × 35 mm2之內。 | zh_TW |
dc.description.abstract | This dissertation presents the design and implementation of a new structure of broadband circularly polarized aperture antenna and the array module. The presented antenna is characterized by the following features:
1) The planar design, suitable for the low-cost PCB manufacturing. 2) The outer-fed design with the microstrip-line, easy to integrate with RF circuitry or antenna array feeding network. 3) The cavity-backed design, suitable for the conformal deployment, providing gain-enhanced unidirectional radiation patterns. 4) The inherent broadband characterization, including the input impedance, the antenna gain, and the axial ratio bandwidth. 5) The EBG structure design, replacing the backed cavity and further reducing the antenna height. Verified by the experimental results, the promising performances of the proposed antenna are achieved, including the 10-dB return loss (RL) bandwidth of 28%, the 3-dB axial ratio (AR) bandwidth around 25%, and the antenna gain about 6~8 dBi. By using the sequential rotation feeding network, the broadband performances of the presented antenna array are successfully achieved and verified with measurements, including the 10-dB RL bandwidth better than 70%, the 3-dB AR bandwidth about 50%, and the half-power (3-dB) gain bandwidth around 40% with the peak at 11 dBi. Furthermore, the presented antenna array is applied to the millimeter wave (MMW) frequencies, for the high data rate wireless transmission system. The EBG structure is employed to realize an impedance-matched ground plane as a reflector to generate unidirectional patterns. The total antenna height is substantially reduced from 10.6 mm to 2.2 mm, about 80% reduction. Finally, the antenna design of system on package (SoP) integrated with RF front-end module is explored and implemented. The integrated module is applied for the short distance moving object detection using X-band RADAR technology. All RF components including antennas are either built-in or mounted on the same LTCC substrate within a compact area of 35 mm × 35 mm. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T04:21:50Z (GMT). No. of bitstreams: 1 ntu-98-D94942010-1.pdf: 10791363 bytes, checksum: 2508b32fc34da2b22eefcc8fbe8912ae (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | CHAPTER 1 Introduction……………………………………………10
1-1 Introduction and Motivation…………………………………11 1-2 Literature Survey………………………………………………13 1-3 Dissertation Organization……………………………………15 CHAPTER 2 Antenna Fundamentals and Definitions……………16 2-1 The Potential Functions and the Far-Field Approximation…………………………………………………………17 2-2 Directivity and Gain…………………………………………20 2-3 Receiving Cross Section and Communication Links………22 2-4 Antenna Polarization…………………………………………24 CHAPTER 3 Novel Broadband Circularly Polarized Aperture Antennas with Traveling Wave Excitation………………………27 3-1 Single Aperture Antenna in Free Space……………………29 3-1-1 Antenna Structure……………………………………………29 3-1-2 Operating Principles — Traveling Wave Excitation…31 3-1-3 Design Consideration………………………………………36 3-1-4 Parametric Study and Design Rules………………………36 3-1-5 Parametric Study for Input Impedance…………………37 3-1-6 Parametric Study for Axial Ratio………………………38 3-1-7 Experimental Results………………………………………40 3-2 Single Element with A Backed Cavity………………………43 3-2-1 Antenna Structure and Design Concepts…………………43 3-2-2 Operating Principles — Traveling Wave Excitation…45 3-2-3 Basic Performances…………………………………………48 3-2-4 Parametric Study for Axial Ratio………………………49 3-2-5 Parametric Study for Input Impedance…………………54 3-2-6 Design Procedure and Discussion…………………………57 3-3 Experimental Verification……………………………………59 3-4 Summary……………………………………………………………62 CHAPTER 4 Development of the Novel Broadband Circularly Polarized Aperture Antenna Array………………………………63 4-1 Sequential Rotation Fundamentals…………………………64 4-1-1 Axial Ratio Improvement……………………………………65 4-1-2 Input Impedance Bandwidth Improvement…………………67 4-2 Antenna Array Development……………………………………69 4-1-1 Array Configuration and Feeding Networks……………70 4-1-2 Experimental Results and Discussion……………………72 4-3 Antenna Array for Millimeter-Wave Frequencies…………75 4-3-1 Array Configuration and Feeding Networks……………76 4-3-2 Antenna Array and Experimental Results………………76 4-3-3 Summary of the CP Antenna for MMW Wireless Application……………………………………………………………82 4-4 Summary……………………………………………………………83 CHAPTER 5 The Novel Broadband Circularly Polarized Aperture Antennas with the Backed Electromagnetic Band-Gap (EBG) Structure………………………………………………………83 5-1 Introduction of EBG …………………………………………85 5-2 Design of the EBG Cell Structure…………………………86 5-2-1 Fundamentals of the EBG Cell Structure………………86 5-2-2 Parametric Study of the EBG Surface……………………88 5-3 Design of the Propesed Antenna with Backed EBG and Experimental Results………………………………………………92 5-3-1 Comparison of the PEC, PMC, Cavity Backed, and EBG Backed Structure……………………………………………………92 5-3-2 Design of the Aperture Antenna with Backed EBG……96 5-3-3 Experimental Results………………………………………98 5-4 Impedance-Transformation Embedded Sequential Rotation and Antenna Array Experimental Results………………………101 5-4-1 Impedance-Transformation Embedded Sequential Rotation………………………………………………………………101 5-4-2 Antenna Array Experimental Results……………………102 5-5 Antenna Array with backed hexagon EBG…………………108 5-6 Application for Frequency Modulated Continuous Wave (FMCW) in X-band……………………………………………………116 5-6-1 System Block…………………………………………………116 5-6-2 Single Element for Transmission Antenna……………119 5-6-3 Two Element Antenna with Magic-T for Receiver Antenna………………………………………………………………125 5-7 Summary…………………………………………………………131 CHAPTER 6 Conclusion………………………………………………132 6-1 Summary…………………………………………………………133 6-2 Contributions…………………………………………………135 References …………………………………………………………137 Publication List…………………………………………………142 | |
dc.language.iso | en | |
dc.title | 平面式寬頻圓極化天線與陣列模組之整合設計 | zh_TW |
dc.title | Integrated Design of Planar Wideband Circularly Polarized Antenna and Array Module | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-1 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 陳俊雄,許博文,莊晴光,林根煌,吳瑞北,張道治,鍾世忠 | |
dc.subject.keyword | 圓極化天線,寬頻天線,毫米波天線,電磁能隙, | zh_TW |
dc.subject.keyword | Circularly polarized antenna,Broadband antenna,Millimeter wave antenna,Electromagnetic Band-Gap, | en |
dc.relation.page | 142 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2009-10-16 | |
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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