基于组合多通带谐振器的三频滤波器设计

提出了一种基于组合多通带谐振器的三频滤波器设计方法，该方法可以独立调节三个通带的中心频率及带宽.组合多通带谐振器是由一个阶跃阻抗谐振器(SIR)和一个普通半波长谐振器组成，其中SIR可以产生第一和第三通带，另外一个谐振器产生第二通带，引入新的馈电结构对两个谐振器同时进行激励。文中分别利用级联型和伪交指型组合谐振器设计三频滤波器，每种结构都有足够的自由度来获得所需的带宽和中心频率，最后设计并加工了两个工作在WLAN(2.45GHz,5.25GHz) 和WiMAX(3.5GHz)频段的三频滤波器，测量结果与仿真结果吻合良好.

Design of a Tri-band Bandpass Filter with Assembled Multiband Resonators

this paper present a novel approach for designing triple-band bandpass filters with independently controlled the center frequency and bandwidth. Two half-wavelength resonators are employed to obtain triple-band response. Novel feeding structures are introduced to simultaneously feed the half-wavelength resonators. To verify the proposed method, Two kinds of filter configurations are proposed, the measured results exhibit triple-band bandpass responses with high selectivity.