一种微带双模带通滤波器的设计

Design of a Dual-mode Microwave Bandpass Filter

提出一种新型的双模微带贴片带通滤波器,利用方形微带谐振器的简并主模来实现双模结构。通过一定的微扰和馈电方式来激励起这对简并模并使之相互耦合以实现通带。研究表明利用这种结构设计滤波器,与传统的设计相比其尺寸会减小。这种滤波器结构紧凑简单且有很好的性能,被广泛应用于微波射频电路。

This paper presents a new doul-mode bandpass filter with microwave patch resonator.The microstrip square patch filter is devised using a pair of fundamental degenrate modes to achieve dual-mode operation.A perturbation and feed method is adopted to excite degenrate modes.By accommodating the coupling between two modes,bandpass filter is designed.Studies show that using this arrangement,the filter size is smaller than the traditional patch resonator.