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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 周錫增 | zh_TW |
| dc.contributor.advisor | Hsi-Tseng Chou | en |
| dc.contributor.author | Swetha Manupati | zh_TW |
| dc.contributor.author | Swetha Manupati | en |
| dc.date.accessioned | 2024-11-19T16:06:03Z | - |
| dc.date.available | 2024-11-20 | - |
| dc.date.copyright | 2024-11-19 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-10-21 | - |
| dc.identifier.citation | [1] N. P. Lawrence, B. W.. -H. Ng, H. J. Hansen and D. Abbott, "5G Terrestrial Networks: Mobility and Coverage—Solution in Three Dimensions," in IEEE Access, vol. 5, pp. 8064-8093, 2017, doi: 10.1109/ACCESS.2017.2693375.
[2] L. Boccia and O. Breinbjerg, "Antenna Basics," 2012. [3] Y. Huang and K. Boyle, Antennas: From Theory to Practice. Wiley, 2008, pp. 107-127, doi: 10.1002/9780470772911.ch4. [4] A. Kosogor and Y. Tikhov, "A 220-300 GHz Offset Dual-Reflector Antenna for Point-to-Point Radio," 2020 14th European Conference on Antennas and Propagation (EuCAP), Copenhagen, Denmark, 2020, pp. 1-3, doi: 10.23919/EuCAP48036.2020.9135974. [5] C. Shu, S. Hu, Y. Yao and X. Chen, "A High-gain Antenna with Polarization-Division Multiplexing for Terahertz Wireless Communications," 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan, 2018, pp. 1-2, doi: 10.1109/IRMMW-THz.2018.8510118. [6] A. Martínez, I. Maestrojuan, D. Valcazar, and J. Teniente, "High gain antenna for sub-millimeter wave communications," 2016 46th European Microwave Conference (EuMC), London, UK, 2016, pp. 37-40, doi: 10.1109/EuMC.2016.7824271. [7] T. S. Bird, "Reflector Antennas," in Handbook of Antenna Technologies, Z. Chen, Ed. Singapore: Springer, 2015, doi: 10.1007/978-981-4560-75-7_30-1. [8] H.T.Chou, Y.-M. Chen and C.-Y. Lee, " Novel Antenna -in Package Design based on End-Fire Radiation Subarray Decompostion to Format Broadside Array at Sub-THz Frequencies," under review, IEEE Transactions on Antennas and Propagation [9] A. Foudazi, A. R. Mallahzadeh and M. M. S. Taheri, "Pattern synthesis for multi-feed reflector antenna using IWO algorithm," 2012 6th European Conference on Antennas and Propagation (EUCAP), Prague, Czech Republic, 2012, pp. 1-5, doi: 10.1109/EuCAP.2012.6206381. [10] S.-W. Lee and Y. Rahmat-Samii, "Simple formulas for designing an offset multibeam parabolic reflector," IEEE Transactions on Antennas and Propagation, vol. 29, no. 3, pp. 472-478, May 1981, doi: 10.1109/TAP.1981.1142611. [11] J. Shinohara, N. Michishita, Y. Yamada, M. T. Islam, and N. Misran, "Measured electrical characteristics of an array feed offset parabolic reflector antenna," 2012 International Symposium on Antennas and Propagation (ISAP), Nagoya, Japan, 2012, pp. 1104-1107. [12] A. Telsang, S. B. V. and S. Vedargarbham, "A Study on Reflector Antennas and Design of Reflector Antenna for 5GHz Band," 2017 International Research Journal of Engineering and Technology (IRJET), vol. 4, no. 7, July 2017. [13] ANSYS, Inc. An Introduction to HFSS, 2017. [14] K. Zhao and L. E. R. Petersson, "Overview of Hybrid Solver in HFSS," 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Boston, MA, USA, 2018, pp. 411-412, doi: 10.1109/APUSNCURSINRSM.2018.8608281. [15] W. Croswell, "Antenna theory, analysis, and design," in IEEE Antennas and Propagation Society Newsletter, vol. 24, no. 6, pp. 28-29, December 1982, doi: 10.1109/MAP.1982.27654 [16] K. B. Kong, H. S. Kim, R. S. Aziz, and S. O. Park, ‘‘Design of offset dual reflector antennas for improving isolation level between transmitter and receiver antennas,’’ Prog. Electromagn. Res. C, vol. 57, pp. 193–203, 2015. [17] J. Zhang, X. Kong, C. Zhang, Y. Gao, and Q. He, "Electrical performance compensation of reflector antenna based on sub-reflector array," Electronics, vol. 12, no. 23, p. 4771, 2023, doi: 10.3390/electronics12234771. [18] R. Bhattacharjee and K. Debbarma, "Analysis of offset reflector performance fed by 2×2 microstrip antenna array using GO technique," 2018 3rd International Conference on Microwave and Photonics (ICMAP), Dhanbad, India, 2018, pp. 1-2, doi: 10.1109/ICMAP.2018.8354629. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/96162 | - |
| dc.description.abstract | 本文提出了一種偏置反射器的設計，以增強用於亞太赫茲通信的 4×4 端射天. 線陣列的增益。工作頻率範圍約為 240 GHz 至 310 GHz，涵蓋了 Sub-THz 通信所需的頻率。雖然較高的頻率通常會導致陣列天線的增益增加，但設計的 4×4 線陣列尚未滿足所需的性能標準。在如此高的頻率下，拋物面反射面天線等高增益天線在增強天線增益方面發揮著關鍵作用，適用於長距離和衛星通信。本研究分析了偏置反射器的設計考慮因素和模擬機制，並通過反射器 天線與 4x4 H-pol 端射天線陣列的集成進一步增強。利用混合仿真方法，評估該覆合天 線系統的性能，並使用高頻結構模擬器 (HFSS) 軟件進行驗證。所設計的 偏置反射器在 260GHz 和 300GHz 頻率上將饋源天線的增益提高了 13dB（理論上）。隨後，分別使用數控加工和 3D 打印機制造偏置反射器及其機械支撐結構，並通過測量數據評估反射器的性能並與模擬結果進行比較，以驗證偏置反射器的特性。
所提出的偏置反射器有望在亞太赫茲頻率下實現高增益，並可廣泛用於 6G 應用和其他相關研究。 | zh_TW |
| dc.description.abstract | This paper presents the design of an Offset Reflector aimed at improving the gain of a 4×4 End-fire antenna configuration for Sub-THz communication systems. The frequency range of operation extends approximately from 240 GHz to 310 GHz, covering the necessary frequencies for Sub-THz communication. While higher frequencies generally lead to increased gain for array antennas, the designed 4×4 antenna array has not met the desired performance criteria. At such high frequencies, high-gain antennas like parabolic reflector antennas play a pivotal role in enhancing the gain of antennas, suitable for long-distance and satellite communications.
This study analyzes the design considerations and simulation mechanism of offset reflectors, further augmented by integrating the Reflector antenna with a 4x4 H-pol End-Fire Antenna array. Utilizing a hybrid simulation methodology, the performance of this composite antenna system is evaluated, and validation is carried out with the aid of HFSS (High-Frequency Structure Simulator) software. The designed offset reflector boosts the gain of the feed antenna by 13dB(theoretically) over the frequencies at 260GHz and 300GHz. Subsequently, the offset reflector and its mechanical support structure are fabricated using CNC machining and a 3D printer respectively, and the reflector's performance is assessed through measurement data and evaluated alongside simulation results to verify the characteristics of the offset reflector. The proposed offset reflector holds promise for achieving high gain at Sub-THz frequency and can be widely used in 6G applications and other related research. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-11-19T16:06:03Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-11-19T16:06:03Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員會審定 #
Acknowledgement ii 摘要 iv Abstract vi CONTENTS vii LIST OF FIGURES xi LIST OF TABLES xv Chapter 1 Introduction 1 1.1 Research Motivation 1 1.2 Overview of Thesis 2 Chapter 2 Literature Review 4 2.1 Types of Parabolic Reflector Antennas 4 2.1.1 Axial or front feed reflector antenna 4 2.1.2 Eccentric or offset feed reflector antenna 5 2.1.3 Cassegrain reflector antenna 6 2.2 Paper Survey on Offset Reflector Antennas 7 2.2.1 A 220-300GHz offset dual-reflector antenna for point-to-point radio 7 2.2.2 A THz high-gain antenna with polarization-division multiplexing 8 2.2.3 High gain antenna for Sub-millimeter wave communications 10 Chapter 3 Design of Feed Antenna 13 3.1 Substrate Information 13 3.2 Antenna Design 14 3.2.1 Design of horizontally-polarized antenna unit 15 3.2.2 Design of 1×4 horizontally polarized end-fire antenna configuration 16 3.2.3 Design of 4×4 H-pol Antenna array with End-fire configuration 18 Chapter 4 Design and Simulation of Offset Reflector Antenna 22 4.1 Design Considerations of Offset Reflector 22 4.1.1 Geometry & size of reflector 22 4.1.2 Derivation of the offset angle 23 4.1.3 Offset height 24 4.1.4 Focal length optimization 25 4.1.5 Material selection 26 4.1.6 Material thickness relative to skin depth 27 4.2 Design Methodology for Offset Reflector 29 4.3 Design of Offset Reflector using HFSS 29 4.3.1 Steps to design reflector antenna 30 4.4 Reflector Antenna Simulation Technologies in HFSS 33 4.4.1 FEM technique 34 4.4.2 Integral equations 34 4.5 Simulation of Offset Reflector using HFSS FEM-IE 37 4.6 Phase Calibration 38 4.6.1 Procedure of phase calibration of reflector with Antenna array 39 4.6.2 Example without phase calibration of antenna system 40 4.7 Parametric Studies of Reflector 43 4.7.1 Simulation of offset reflector antenna at different focal lengths 43 4.7.2 Simulation of offset reflector antenna at different offset angles 50 4.7.3 Simulation of the offset reflector at different offset heights 57 4.8 Design of Support Structure 66 Chapter 5 Measurement Results of the Offset Reflector 71 5.1 Block Diagram of the Measurement Setup 71 5.2 Measurement Setup of Reflector with Feed as Horn 72 5.2.1 Measured results of the reflector antenna with horn as feed element 73 5.3 Measurement setup of the reflector Antenna with 4×4 H-pol End-Fire Antenna Array as feed element 74 5.3.1 Procedure to numerically add the E-field patterns 79 5.3.2 Measurement results of reflector antenna with 4×4 horizontally polarized antenna array with end-fire configuration as feed 81 Chapter 6 Conclusion 87 REFERENCE 89 | - |
| dc.language.iso | en | - |
| dc.title | 太赫茲頻段 4×4 側端陣列天線饋入之碟型天線設計 | zh_TW |
| dc.title | Design of Offset Reflector fed by a 4×4 End-Fire Antenna Array for Sub-THz Communications | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-1 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 廖文照;盧信嘉;鄭宇翔 | zh_TW |
| dc.contributor.oralexamcommittee | Wen-Jiao Liao;Hsin-chia Lu;Yu-Hsiang Cheng | en |
| dc.subject.keyword | 偏置反射器,焦距,天線陣列,亞太赫茲頻率, | zh_TW |
| dc.subject.keyword | Offset reflector,Focal length,Antenna array,Sub-THz frequency, | en |
| dc.relation.page | 91 | - |
| dc.identifier.doi | 10.6342/NTU202404478 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2024-10-21 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 電信工程學研究所 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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