利用環形開槽諧振器之迴路天線設計

近年來，有相當多有關環形開槽諧振器的探討及應用，此諧振器只要適當地使其共振且在空間中作週期性的排列，可產生在自然界中找不到的負介磁係數，進而去形成所謂的左手材料。不管在傳輸線、天線上的應用都廣泛地被探討，使用。環形開槽諧振器的分析已經幾近完備，不管是此諧振器的電磁特性，還有經過散射參數所得的等效介磁係數，及等效電路中的等效電感或等效電容值，也都有一套完備的方法來求得。由於現今的行動裝置因為技術上的進步，有越來越小的趨勢，因此天線的微小化，當然也成為一個重要的課題，因此在本論文中，會利用一般縮小化常用到的慢波觀念來達成微小化，而使用的工具便是環形開槽諧振器，但由於諧振器本身等效出來的電感電容值相較於真實的電感電容值小很多，當然在微小化的倍數就不會太大，因此，本論文也提出一個結合諧振器和真實電感應用於迴路天線，來達到更大的縮小化。上述所有提出的理論、應用、天線的實作及天線的實驗驗證，都會在本論文一一地探討。

關鍵字

共平面波導；左手物質；微小化天線；槽孔天線；開槽環形諧振器

並列摘要

Many literatures about split-ring resonators（SRRs）have been presented for application in recent years. When SRRs are arranged periodically, it could generate the negative permeability which couldn’t find in nature. It is also called the metamaterial. SRRs are applied in transmission lines and antennas extensively. The analysis of SRR is almost complete, for instance, its electromagnetic characteristics, effective permeability which is obtained by scattering parameters, and effective inductance or capacitance in equivalent circuit. With the rapid development of modern wireless technology, mobile devices are asked for as small as possible. Therefore, miniaturization has become an important issue in wireless systems. In this thesis, we will take advantage of slow-wave concept to achieve miniaturization. It is known that the equivalent inductances and equivalent capacitances of SRRs are much smaller than those of the lump elements. Thus, the percentage of size reduction by using SRRs is limited. Therefore, we propose in this thesis a slot loop antenna using SRRs in conjunction with the lump inductors to achieve the larger percentage of size reduction. The proposed antennas will be theoretically studied and experimentally verified.

並列關鍵字

Coplanar wavuguide ； metamaterials ； miniaturized antennas ； slot antennas ； split-ring resonators

參考文獻

[1] V. G. Veselago, “The Electrodynamics of Substrates with Simultaneously Negative

[2] I. V. Lindell, S. A. Tretyakov, K. I. Nikoskinen, and S. Ilvonen, "BW-Media with Negative Parameters, Capable of Supporting Backward Waves", Microwave Opt .Tech. Lett., vol. 31, pp. 129-133, 2001.

[3] K. Aydin, and K. Guven, "Observation of Negative Refraction and Negative Phase Velocity in Left-Handed Metamaterials", App. Phys. Lett., 86, 124102-1-124102-3, 2005.

[4] W. Rotman, "Plasma Simulation by Artificial Dielectrics and Parallel-Plate Media", IRE Trans. Antenna Propagat., vol. 10, pp. 82-95, 1962.

[5] J. B. Pendry, A. J. Holden, W. J. Stewart and I. Youngs, “Extremely Low Frequency Plasmons in Metallic Mesostructures”, Phys. Rev. Lett., vol. 76, No. 25, pp. 4773-4776, Jun. 1996.

國際替代計量

利用環形開槽諧振器之迴路天線設計

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