W波段单E面耦合宽带波导滤波器  

W-Band Broadband Waveguide Filter Based on Single-Sided E-Plane Coupling

作　　者：许广阳 赵芸 陈垚 葛俊祥[1] 丁江乔 XU Guang-yang;ZHAO Yun;CHEN Yao;GE Jun-xiang;DING Jiang-qiao(Institute of Electronic Information Technology and Equipment,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学电子信息技术与装备研究院,南京210044

出　　处：《微波学报》2021年第3期60-63,67,共5页Journal of Microwaves

基　　金：国家自然科学基金(61801230,12003011);南京信息工程大学-大学生创新创业训练计划(201910300189)。

摘　　要：毫米波/亚毫米波探测、通信、成像等系统的快速发展对W波段波导滤波器的带宽、损耗、集成方式等多方面提出了高要求。针对新一代W波段固态宽带高集成接收机的应用需求,文中提出了一种基于单侧E面电容耦合型的W波段波导带通滤波器,实现85.5~97.5 GHz(3 dB带宽≈13%)的宽频带响应。该波导滤波器具有易于现代高精度铣削工艺(CNC)制备的对称E面分裂型加工结构,能够获得低损耗特性和高鲁棒性;此外还基于极点提取方法,引入额外谐振腔实现传输零点,进一步提高该滤波器的上边带外抑制。经加工并实测,上述滤波器在W全波段内测试结果与仿真结果高度吻合,具有可重复性和频率延展性。Millimeter wave/submillimeter wave systems for detection, communication, imaging, et al. developing rapidly, brings high requirements on the bandwidth, loss and integration fields of W-band waveguide filters. In response to the applications of the new generation of W-band solid-state broadband high-integration receivers, this paper proposes a W-band waveguide bandpass filter based on a single-sided E-plane capacitive coupling to achieve the wide frequency response of 85.5-97.5 GHz(3 dB FBW ≈ 13.1%). This waveguide filter also has a symmetrical E-plane split structure that can be easily processed by the modern high-precision milling technology(CNC), and then can obtain the low-loss characteristic and high robustness. In addition, a resonant cavity is introduced to realize the transmission zero based on the pole extraction method, which further improves the upper sideband suppression of such filter. After the processing and actual measurement, the tested results of the above-mentioned filters in the full W-band are highly consistent with the simulation results, which indicate that they have structural repeatability and frequency expansion.

关 键 词：W波段 E面耦合 宽带 波导滤波器 

分 类 号：TN713[电子电信—电路与系统]