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研究生:許勝傑
研究生(外文):Hsu, Sheng-Chieh
論文名稱:梯度人造磁導體的反射特性
論文名稱(外文):Reflection Characteristics of a Gradient Artificial Magnetic Conductor
指導教授:黃瑞彬黃瑞彬引用關係
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電信工程研究所
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:2010
畢業學年度:99
語文別:英文
論文頁數:35
中文關鍵詞:梯度人造磁導體波束控制雷達橫截面
外文關鍵詞:gradient artificial magnetic conductorbeam steeringradar cross section
相關次數:
  • 被引用被引用:0
  • 點閱點閱:175
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  • 下載下載:16
  • 收藏至我的研究室書目清單書目收藏:0
我們研究了下方有著接地金屬的介質平版所組成二維正方形貼片陣列的電磁反射特性。藉著改變金屬貼片的大小,兩兩相鄰的貼片會有一個相等的反射相位差角。利用這個在陣列單元中等差遞增的反射相位特性,當一個垂直入射的平面波打到這個結構時,他的反射波會被散射到我們所設計的方向。在這篇論文中,我們根據陣列天線理論建立了一個簡單的公式來計算反射波的遠場場形。再者我們使用一個時域全波模擬套裝軟體(CST)來精準地計算在結構中的電磁場分布以及遠場場形。此外我們將這個結構實作出來並且在電磁無反射實驗室中量測他的散射場型。經由這個實驗,我們量測到了很好的數據結果來驗證我們所提出的設計原理和步驟。這樣的一個結構可以被用來應用在波束控制(beam steering)以及減少雷達橫截面(radar cross section reduction)。
We studied the electromagnetic reflection of a two-dimensional square patches array backed with a grounded dielectric slab. By tuning the size of the metal patch, the adjacent two patches may have an equal reflected-phase angle. Using this property of progressively reflected-phase angle in the array elements, for a normal incident wave we can steer the reflected wave into a desired direction. In this thesis, we have established a simple formula based on the array antenna theory to figure out the reflected wave pattern. Moreover, a time-domain full-wave simulation package (CST) was employed to rigorously calculate the electromagnetic fields in the structure as well as the far-field pattern. Besides, we have fabricated the structure and measured its scattering pattern in an electromagnetic anechoic chamber. The excellent measured results confirm the design principle and procedures in this research. Such a planar structure may have potential applications in beam-tilting and radar cross section reduction.
Catalog
Chinese Abstract ............................................................................................................ .i
Abstract ......................................................................................................................... .ii
Acknowledgement ....................................................................................................... iii
Catalog .......................................................................................................................... iv
Figure Catalog ................................................................................................................ v
Table Catalog ................................................................................................................ vi
Chapter 1 Introduction ................................................................................................... 1
Chapter 2 Structure Confuguration ................................................................................ 4
Reflection phase of a 2D periodic structure consisting of metal patches array ..... 4
Chapter 3 Numerical Analysis ....................................................................................... 8
3.1 Reflection characteristics of a gradient AMC surface ..................................... 8
3.2 Array antenna factor ...................................................................................... 12
Chapter 4 Experimental Studies................................................................................... 15
4.1 Bistatic RCS measurement ............................................................................ 16
4.2 Monostatic RCS measurement ....................................................................... 17
Chapter 5 Numerical Results, Experimental Results and Discussion.......................... 19
5.1 Numerical Results .......................................................................................... 19
Patch size ....................................................................................................... 19
Thickness of substrate .................................................................................... 19
Dielectric constant ......................................................................................... 20
Unit cell dimension ........................................................................................ 21
5.2 Field Coverage ............................................................................................... 22
5.3 Experimental Results ..................................................................................... 24
RCS Reduction Aplications ........................................................................... 24
Conclusion ..................................................................................................... 32
v
Chapter 6 Applications ................................................................................................. 33
References .................................................................................................................... 34
References
[1] M. Paquay, J.C. Iriarte, I. Ederra, R. Gonzalo and P. de Maagt, ”Thin AMC Structure for Radar Cross-Section Reduction.” IEEE Trans. Antennas Propag., Vol.55, No.12, pp.3630-3638, Dec. 2007.
[2] D. Sievenpiper, L. Zhang, R. F. J. Broas, N. G. Alexopolus, and E. Yablonovitch, “High-impedance electromagnetic surfaces with a forbidden frequency band,” IEEE Trans. Microwave Theory Tech., Vol.47, pp.2059-2074, Nov 1999.
[3] C. Mias and Jyh Haur Yap, “A varactor-tunable high impedance surface with a resisiting-lumped-element biasing grid,” IEEE Trans. Antennas Propag., Vol.55, No.7, pp.1955-1962, July. 2007.
[4] D. F. Sievenpiper, J. H. Schaffner, H. J. Song, R. Y. Loo and G. Tangonan, ”Two-dimensional beam steering using an electrically tunable impedance surface,” IEEE Trans. Antennas Propag., Vol.51, No.10,pp.2713-2722, Oct. 2003.
[5] D. Sievenpiper, J. Schaffner, J. J. Lee and S. Livingston, “A steerable leakage wave antenna using a tunable impedance ground plane,” IEEE Antenna and Wireless Propagation Letters, Vol.1, pp.179-182, 2002.
[6] W. Yang, G. Hua and W. Hong, “Wideband artificial magnetic conductor structure for Ku-band antenna applications,” Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on, Page. 954-957, 2009.
[7] Y. Y. Gu, W. X. Zhang, Z. C. Ge and Z. G. Liu, “Research on reflection phase characterizations of artificial magnetic conductors,” Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings, Vol.3,2005.
[8] M. E. de Cos, F. L. Heras and M. Franco, “Design of planar artificial magnetic conductor ground plane using frequency selective surfaces for frequencies below
35
1GHz,” IEEE Antenna and Wireless Propagation Letters, Vol.8, pp.951-954, 2009.
[9] N. Engheta and R. W. Ziolkowski (2006). Metamaterials-Physics and Engineering Explorations. The institute of Electrical and Electronics Engineers.
[10] J. Lanteri, C. Migliaccio, J. A. Laurinaho, M. Vaaja, J. Mallat and A. V. Raisanen, “Four-beam reflect-array antenna for mm-waves: design and tests in far-field and near-field ranges,” Antennas and Propagation, EuCAP 2009, 3rd European Conference on,pp.2532-2535, 2009.
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