一种小型化的高性能双阻带滤波器设计

Design of A Low Profile H-shaped Slot Antenna Backed by Substrate Integrated Waveguide Cavity

带阻滤波器主要应用于无线通信领域、雷达、测试等微波系统中,它主要用途是滤除或者降低混杂在有用信号中的干扰成分^([1-2])。在传统的带阻滤波器设计里,常常采用带状线或者是波导结构来实现,但不管是哪种结构,所设计的带阻滤波器矩形系数、寄生阻带等参数都难以达到要求,并且还有尺寸过大这些缺点,很难符合现代滤波器小型化的标准。本设计基于平面耦合结构,运用1/4波长的短路微带线作为谐振器,通过间接耦合的方式仿真和设计了一个小型化的双阻带滤波器。本设计结构紧凑,尺寸小巧且具有较远的寄生阻带、较深的阻带抑制等优点。

Band-stop filter is mainly used in all kinds of wireless communication, radar systems, testing of microwave system, and so on,its main function is mixed in the useful signal filtering interference elements. Traditional band-stop filter whether implemented using waveguide structure or stripline structure, the design of rectangular band-stop filter coefficient is difficult to meet the requirements, the parasitic resistance with far enough, and there are too much size, it is difficult to accord with the requirement of modern filter miniaturization. This design based on planar coupling structure, using the 1/4 wavelength of short-circuit as resonator microstrip line, through the way of indirect coupling simulation and design of a miniature dual stopband filters.This design compact structure, small size and has far parasitic stopband, deep stopband suppression, etc.