具有频率选择性的毫米波双波段集成衬底间隙波导单腔滤波器

Qiuhua Lin, Dongya Shen, Lihui Wang, Zhiyong Luo
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引用次数: 1

摘要

本文利用多模耦合拓扑结构,提出了一种具有增强频率选择性的新型双频 ISGW 腔体滤波器。通过设计空腔来控制模式数量,然后通过分析这些选定模式之间的耦合关系来确定端口。通过合成滤波器的耦合矩阵,引入一个非共振节点(NRN)结构来灵活调节模式的频率,从而从一个没有 NRN 的三频滤波器获得双频和四频滤波响应。此外,新设计的频率选择性表面(FSS)作为腔体的上表面,大大改善了大多数传统腔体滤波器设计和测量中经常出现的带外抑制和频率选择性差的问题。结果表明,其两个中心频率分别为 f01 = 27.50 GHz 和 f02 = 32.92 GHz。与没有 FSS 元表面的双频滤波器相比,带外抑制水平从实测的 5 dB 提高到 18 dB,两个设计频带之间的有限传输零点(FTZ)数从实测的 1 增加到 4。与三频和四频滤波器相比,其通带带宽从实测的 1.17 %、1.14 % 和 1.13 % 或 1.31 %、1.50 %、0.56 % 和 0.57 % 扩大到 1.71 % 和 1.87 %。此外,过滤器还具有结构紧凑、体积小和重量轻的特点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An mmWave dual-band integrated substrate gap waveguide single cavity filter with frequency selectivity
A novel dual-band ISGW cavity filter with enhanced frequency selectivity is proposed in this paper by utilizing a multi-mode coupling topology. Its cavity is designed to control the number of modes, and then the ports are determined by analyzing the coupling relationship between these selected modes. By synthesizing the coupling matrix of the filter, a non-resonating node (NRN) structure is introduced to flexibly tune the frequency of modes, which gets a dual-band and quad-band filtering response from a tri-band filter no the NRN. Furthermore, a frequency selective surface (FSS) has been newly designed as the upper surface of the cavity, which significantly improves the bad out-of-band suppression and frequency selectivity that often exists in most traditional cavity filter designs and measurements. The results show that its two center frequencies are f01 = 27.50 GHz and f02 = 32.92 GHz, respectively. Compared with the dual-band filter that there is no the FSS metasurface, the out-of-band suppression level is improved from measured 5 dB to 18 dB, and its finite transmission zero (FTZ) numbers is increased from measured 1 to 4 between the two designed bands. Compared with the tri-band and quad-band filter, its passband bandwidth is expanded from measured 1.17 %, 1.14 %, and 1.13 % or 1.31 %, 1.50 %, 0.56 %, and 0.57 % to 1.71 % and 1.87 %. In addition, the filter has compact, small, and lightweight characteristics.
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