Analysis of filter characteristics for a new type of dielectric grating waveguide based on left-handed materials

作者：Cheng Jian^*; Xu Shan Jia

来源：Journal of Infrared and Millimeter Waves, 2008, 27(1): 31-+.

• left-handed materials
• periodic structure
• dielectric grating
• filter structure

A new type of dielectric grating waveguide filter based on left-handed material (LHM), was proposed and its band-rejected characteristics were carefully analyzed by a method which combines the rigorous mode matching procedure with multimode network method. The Brillouin curve of the dominant mode was calculated and the variations of the normalized center frequency and the bandwidth as well as the maximum attenuation constant in the stopband with the geometry structure parameters were given. Comparisons between the LHM and normal grating structures were presented with some explanations. It is indicated that the bandwidth and the maximum attenuation constant in the stopband for the LHM grating waveguide are much larger than those for the conventional grating structure. The calculated results are of guiding significance for the design of the present kinds of band-rejected filters.

• 出版日期2008-2
• 单位中国科学技术大学