基于EBG结构的W波段宽带低损耗滤波器  

W-band EBG Loaded Band-pass Filter with Broadband and Low Loss Operation

作　　者：陈翔[1] 陈振华[2] 

机构地区：[1]中国空间技术研究院西安分院,西安710100 [2]南京信息工程大学,南京210096

出　　处：《微波学报》2017年第4期41-44,共4页Journal of Microwaves

基　　金：装备发展部重点基金(9140C530301140C53012)

摘　　要：基于电磁带隙结构(Electromagnetic Band-gap,EBG),本文设计实现了一种W波段宽带低损耗带通滤波器。通过EBG结构的频率带阻特性实现低通滤波,同时利用矩形波导固有的高通特性实现滤波器的低端频率截止。采用减宽波导加载微带EBG结构的方式将高通与低通结构相结合,经过适当的阻抗匹配设计,实现了覆盖75~110GHz全W波段的宽带滤波特性。EBG结构通过在5mil厚Rogers5880基片上制作一系列E面周期加载的谐振单元构成。实物测量结果表明,在75GHz^100GHz内,回波损耗典型值为-20d B,在100GHz^110GHz范围内,回波损耗典型值为-15d B,全带宽内插入损耗典型值小于1d B。该滤波器可用于各种W波段电子系统及测量设备中。A low insertion loss W-band band-pass filter based on EBG structure is proposed in this paper. The stopband characteristic of EBG is adopted to achieve the low-pass filter property,and the inherent high-pass characteristic of rectangular waveguide is used to determine the lower limit of pass-band. By combination of low-pass and high-pass structure realized by loading reduced-width rectangular waveguide with micro-strip EBG structure and proper design of impedance matching,the broadband operation of the proposed filter covering 75 ～ 110 GHz is achieved. The EBG structure is fabricated on one side of a 5mil thick Rogers5880 substrate with a certain amount of E-plane periodically loaded resonators. A prototype of the filter is fabricated and measured. The measurement results show that the typical return loss is about-20 d B and-15 d B in 75 GHz ～ 100 GHz and 100 GHz ～ 110 GHz respectively,and the insertion loss is within 1 d B over the 75 GHz ～ 110 GHz band. This filter can be widely used in a variety of W-band application systems and general test instruments.

关 键 词：W波段 电磁带隙结构 滤波器 

分 类 号：TN713[电子电信—电路与系统]