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研究生:許博凱
研究生(外文):Po-Kai Hsu
論文名稱:應用於船艦天線系統之天線性能的模擬與量測分析技術
論文名稱(外文):Simulation and Measurement Analysis Techniques for Antenna Perfromance of Shipborne Antenna Systems
指導教授:黃啟芳黃啟芳引用關係
指導教授(外文):Chi-Fang Huang
口試委員:黃啟芳
口試日期:2012-07-26
學位類別:碩士
校院名稱:大同大學
系所名稱:通訊工程研究所
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:2012
畢業學年度:100
論文頁數:73
中文關鍵詞:電磁場型模擬縮尺理論
外文關鍵詞:Electromagnetic field simulationscaled down theory
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近幾十年來,隨著電腦設備的進步,可以利用電腦程式來進行天線電磁場模擬的結構也越來越多,從最基本的微帶天線,到大型的金屬物件,例如:飛機,船艦…等。早期礙於電腦記憶體的價格昂貴,體積龐大,要運算如此大型的物件在當時可說是一項艱難的任務。時至今日,人們可以較輕易地取得足夠的記憶體來進行大型物件的電腦模擬,對於此類需要耗費大量時間與金錢的大型工程的設計來說有非常顯著的幫助。
飛機、船艦等配備複雜無線通訊系統的大型金屬結構體,在設計時必須同時考慮天線在該機體上的運作能力是否能正常發揮。在如此狹窄的空間內安裝多支天線,除了輻射場型會因為金屬遮蔽物而變得不完整,同時也可能因為天線太過靠近而造成相互干擾,影響通訊品質。
此類大型結構體,不論是在設計或是在製造階段,都必須花費龐大的資金與時間,若是在建造完成後再來量測與評估天線的性能是否受到影響,那麼當發現問題時將會變得難以修正。在這個情況下,縮尺模型理論便是一個解決此問題的好方法,利用縮尺模型,我們可以較輕易的發現出問題的結構,並且在設計階段就修正此問題,甚至可以利用縮尺模型來配置出最適當的結構。
本篇論文主要的目標在使用電腦模擬軟體來模擬天線安裝在金屬船體上的不同位置時,會對場型造成什麼影響。之後,再利用以縮尺模型理論所製作的金屬船艦在無反射室中量測,並且比較模擬結果與實際量測之間的差異程度。
In last decades, there are more and more structures that can be simulated by the computer, including from the basic microstrip antennas, to the large metal structures, like ships or airplanes. In the early stage, it is a hard mission to calculate the structures with big size like this because of the price and volume of computer memory are both huge. Nowadays, people can easily get enough memory for the simulations of large structure, and this is a great help for the engineers of big structures design.
Those large metal structures with complex wireless communication systems, like ships and airplanes, need to think about whether the antennas can work normally or not while designing. The narrow space is not only makes the patterns incomplete by metal shelters, but also may cause the interference of the antennas.
It always costs a lot of time and money on this kind of large structures, no matter when designing or building. If we measure the performance of the antennas after it is done, the problems of the structures will be hard to correct.
The target of this paper is using computer to simulate the performance of the antennas installed at the different position. Then we use the scaled down model to measure the patterns in the chamber, and compare the difference between measurement and simulation.
ABSTRACT i
摘要 ii
ACKNOWLEDGMENT iii
LIST OF FIGURES vi
LIST OF TABLES ix
Chapter 1 INTRODUCTION 1
1.1 Antenna Radiation Pattern 1
1.2 Shipborne Antenna 2
1.3 Benefits of Simulation by Computer 3
1.4 Chapter Outline 4
Chapter 2 FDTD AND SCALE DOWN THEORY 5
2.1 Finite-Difference Time-Domain Theory 6
2.1.1 Mesh 7
2.1.2 Differential equation 8
2.2 Scale down Theory 11
2.3 Cross Talk 13
Chapter 3 SIMULATION AND MEASUREMENT 14
3.1 CST Microwave Studio 14
3.2 Measurement by Using Scale down theory 19
3.2.1 The scaled down model 21
3.2.2 Experimental Arrangement 24
3.2.3 Cross Talk Measurement 26
Chapter 4 RESULTS OF SIMULATION AND MEASUREMENT 29
4.1 Patterns of Simulation and Measurement 30
4.1.1 No.1 HF communication antenna 30
4.1.2 No.2 HF communication antenna 32
4.1.3 No.1 HF receiver antenna 34
4.1.4 No.2 HF receiver antenna 36
4.1.5 No.3 HF receiver antenna 38
4.1.6 No.4 HF communication antenna 40
4.1.7 No.3 HF communication antenna 42
4.1.8 The Result of Crosstalk 44
Chapter 5 ERROR CORRECTION TECHNIQUE FOR PATTERN EVALUATION 47
5.1.1 The Influence of Connectors 47
5.1.2 The drillings’ effect 51
5.1.3 The Improvement of Scaled Antenna 53
Chapter 6 CONCLUSION AND FUTURE WORK 57
[1] Yoichi Nakagawa, Masahiro Mimura, KentaroMiyano, YoshioKoyanagi, and Kyohei Fujimoto,“Improved Method for Evaluating Antenna Performance in Moble Environment With Consideration of Polarization and Phase,” IEEE Transaction on Vehicular Technology, Vol. 52, No.5, September 2003.
[2] Young-Huang Chou, Shew- Lin, and Shyh-Jong Chung, “Analysis of a Grating Metal Structure With Broad Back-Scattering Field Pattern for Applications in Vehicle Collision Avoidance System,”IEEE Transactions on Vehicular Technology, Vol.51, No. 1, January 2002.
[3] Klaus-Werner Gurgel, “On the Performance of a Shipborne CurrentMapping HF Radar,” IEEE Journal of Oceanic Engineering, Vol. 25, No. 1, January 2000.
[4] G. Paul Francis and Donald H. Mark, “Amplitude and Phase Response of Freeboard-Mounted Ship Antennas,” IEEE Transactions on Antennas and Propagation, Vol. AP-21, No. 6, November 1973.
[5] P.J. Baldwin, A.G.P. Boswell, D.C. Brewster, and J.S. Allwright, “Iterative Calculation of Ship-borne HF Antenna Performance,” IEE Proceedings-H, Vol. 138, No. 2, April 1991.

[6] Leonard L. Tsai and Charles E. Smith,”Moment Methods in Electromagnetics forUndergraduates,” IEEE Transactions on Education, Vol. E21, No. 1, February 1978.
[7] Milan M. Iliḉ, MiroslavDjordjeviḉ, Andjelija Ž. Ilič, and Branislav M. Notaroṧ, “Higher Order Hybrid FEM-MoM Technique for Analysis of Antennas and Scatterers,” IEEE Transactions on Antennas and Propagation, Vol. 57, No.5, May 2009.
[8] K. S.Yee, “Numerical solution of initial boundary value problems involving Maxwell equations in isotropic media,” IEEE Trans, Antennas Propagate, AP-14(3): 302~307, May. 1966.
[9] Jean-PierreBerenger,”Perfectly Matched Layer for the FDTD Solution of Wave-Structure Interaction Problems.”IEEE Transactions and Propagation, Vol. 44, No. 1, January 1996.
[10] RegisGuinvarc’h, Marc Lesturgie, Remi Durand, and Anil Cheraly,”On the Use of HF Surface Wave Radar in Congested Water: Influence of Masking Effect on Detection of Small Ships,” IEEE Journal of Oceanic Engineering, Vol. 31, No.4, October 2006.
[11] Fu-Lai Chu, “軍艦電磁模型做天現場型及阻抗量測之研究,” October 1991.
[12] Steven R. Best, “On the Use of Scale Brass Models in HF Shipboard Communication Antenna Design,” IEEE Antenna’sand Propagation Magazine, Vol. 44, No.2, April 2002.
[13] R. J. Grossage, B.Sc.,”The Use of Ship Models Magnetically to Scale in Degaussing Research,” The Institution, 4th,April 1946.
[14] Dong-anSong, QiZhang, Chong-huaFang, JingYu, “The Coupling Characteristics Analysis between Antennas for Ship Formation,” 2010 Asia-Pacific International Symposium on Electromagnetic Compatibility, April 12 - 16, 2010, Beijing, China.
[15] F.C. Paddison, C.A. Shipley, A.L. Maffett, and M.H. Dawson,” Radar Cross Section of Ships,” IEEE Transactions on Aerospace and Electronic Systems, Vol. AES-14, No. 1, January 1978.
[16] F.C. Smith, “Edge Coatings that Reduce Monostatic RCS,”IEE Proc.-Radar Sonar Navig., Vol.149, No.6, December 2002
[17]Andrew A. Zaporozhets and Mireille F. Levy, “Bistatic RCS Calculations with the Vector Parabolic Equation Method,” IEEE Transactions on Antennas and Propagation, Vol. 47, No.11, November 1999.
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