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中文摘要：
提出了一种新型介质栅波导阻带滤波结构，并采用多模网络与严格模匹配相结合的方法对该阻带滤波特性进行了仔细分析，给出了主模TM模的Brillouin图及滤波结构的归一化中心频率、阻带的宽度和带内最大衰减等特性和结构参数的关系．与传统的介质栅滤波器相比，新滤波器结构不仅具有金属损耗小的优点，而且其阻带带宽和带内衰减都要比传统介质栅滤波器的大得多．文中所给出的计算结果对设计该新型带阻滤波结构有指导意义．
英文摘要：
A new stopband filter consisted of dielectric grating waveguide was proposed and its filter characteristics were carefully examined by an approach of combining the muhimode network theory with the rigorous mode-matching method. The Brillouin diagram for the dominant TM mode and the variations of the normalized center frequency and the band width as well as the maximum attenuation constant of the stopband with the geometry parameters were presented. By comparing with the traditional dielectric grating stopband filter, it has been found that the new filter structure not only has the advantage of lower conductor loss, but also is of larger stopband bandwidth and maximum attenuation in the band than those of the traditional ones. The numerical results presented here are of guiding significance for the design of new band-rejected filters.
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