基于光子带隙(PBG)结构的小型K波段谐振式带通滤波器

A Novel Compact Resonant Band-Pass Filter for K-Band Based on PBG Structure

提出了一种新的基于光子带隙结构的K波段谐振式带通滤波器 ,给出了近似设计公式 ,并在半导体衬底上 ,采用微电子的工艺实现了这种结构。这种滤波器设计方法简单 ,体积小 ,整个长度接近谐振频率上的导波波长 ,加工方便 ,便于与其他电路集成 ,带内损耗小 ,阻带范围宽 ,带外抑制高。另外 ,本文的理论分析和实验结果均基于半导体衬底 ,可以直接应用于微波集成电路中。理论模拟与实际测量值基本吻合。

A new resonant bandpass filter based on the PBG structure is presented. The filter is much easier for fabrication and integration, more compact and simpler for design than the conventional parallel coupled line filter. The presented filter has wide reject band and steep and deep upper band stop. A semiconductor based structure is realized using microelectronics technology. The S parameter of the structure is measured and compared well with the theoretical value.