A New Frequency Seffective Surface Composed of Left-handed Materials
The frequency seffective characteristics of a new dieffectric periodic structure composed of left-handed materials are carefully studied by a method which combines the multimode network theory with the rigorous mode matching method. The variations of the frequency selective characteristics with structure parameters and dieffectric loss are presented. Guidelines for accurate design of the LHM dieffectric frequency seffective surface are given. The frequency seffective characteristics of LHM grating structures shown in Figure 1 are carefully analyzed using a method which combines multimode network theory with the rigorous mode matching method. Figure 2 presents the variations of the power reflection coefficient of n=0 space harmonic with the normalized frequency d=λ.The dashed line is the result of RHM grating. It has been seen from Figure 2 that the bandwidth of the total reflection for LHM periodic structure is greatly increased and the number of the strong reflection is also increased. The bandwidth of the first maximum reflection decreases with the increase of the thickness of RHM substrate as shown in Figure 3. This is because increasing the thickness of substrate will enhance the right-handed characteristics while weaken the left-handed characteristics of the structure. So the frequency seffective characteristics can be flexibly modified by changing the structure parameters.
Weihai Fang Shanjia Xu
Department of Electronics Engineering and Information Science University of Science and Technology of China, Hefei 230027, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
135-136
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）