Reflection Characteristics of a Gradient Artificial Magnetic Conductor

• Main Authors: Hsu, Sheng-Chieh, 許勝傑
• Other Authors: 黃瑞彬
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/37128951384019539623

碩士 === 國立交通大學 === 電信工程研究所 === 99 === 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.