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題名 | 超穎材料高增益天線之介紹=Introduction to Metamaterial High-Gain Antennas |
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作者 | 林弘萱; 吳俊熠; Lin, Hung-hsuan; Wu, Chun-yih; |
期刊 | 電腦與通訊 |
出版日期 | 20091200 |
卷期 | 130 2009.12[民98.12] |
頁次 | 頁87-95 |
分類號 | 448.813 |
語文 | chi |
關鍵詞 | 天線; 增益; 指向性; 超穎材料; 左手系; 雙負材料; 折射率趨零材料; 法布立-若拍; 橫向等效網路; Antenna; Gain; Directivity; Metamaterial; Left-handed; Double NeGative; DNG; Near zero index; NZI; Fabry-Pérot; FP; Transverse equivalent network; TEN; |
中文摘要 | 超穎材料是具有特異電磁性質的人造結構。此特異的性質通常是指在對特定頻率的電磁波傳播而言具有然界所不存在的介電常數(ε)、導磁係數(μ)或是折射率(n)。而超穎材料一般是由次波長之週期性結構所組成,通常具有金屬構造。由於超穎材料的特殊電磁波響應讓它在光學以及微波通訊等領域具有相當重要的應用。微波的波長不算短,相對應的次波長結構容易製作,因此近年來有相當多創新的微波頻段超穎結構與應用發表,尤其以天線的應用居多。它的好處包括增加天線增益、空間模態濾波、增加隔離度、縮小尺寸、增加頻寬等。本文將針對超穎材料對天線增益提高的功能做介紹。 |
英文摘要 | Metamaterial is a class of artificial structure with extraordinary electromagnetic property, which usually means naturally non-existing permittivity (ε), permeability (μ) or refractive index (n) of electromagnetic propagation at certain frequency. Metamaterial is usually composed of sub-wavelength periodic structure and usually contains metallic component. Because of its special electromagnetic response, it is utilized in important applications such as optical and microwave communication fields. The relative long wavelength makes it easier to fabricate metamterial at microwave frequency. Therefore, many novel structures and applications for microwave frequency, especial for antennas, have been revealed in recent year. The advantages of applying metamaterial to antennas are higher antenna gain, modal filtering, isolation enhancement, size shrinking and bandwidth broadening. In this article, the author will focus on introducing the capability of metamaterial for antenna gain enhancement. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。