高带外抑制特性微波陶瓷波导滤波器的设计

梁飞; 蒙顺良; 吕文中

doi:10.11959/j.issn.1000-436x.2021029

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高带外抑制特性微波陶瓷波导滤波器的设计

学术通信 | 更新时间：2024-06-05

- 高带外抑制特性微波陶瓷波导滤波器的设计
- Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics
- 通信学报 2021年42卷第4期页码：194-201
- 作者机构：
  
  华中科技大学光学与电子信息学院，湖北武汉 430074
- 作者简介：
  
  [ "梁飞（1975- ），男，湖北武汉人，博士，华中科技大学副教授、硕士生导师，主要研究方向为微波介质材料与器件。" ]
  [ "蒙顺良（1996- ），男，广西贵港人，华中科技大学硕士生，主要研究方向为微波介质滤波器设计。" ]
  [ "吕文中（1966- ），男，河南偃师人，博士，华中科技大学教授、博士生导师，主要研究方向为微波介质材料及其相关通信器件。" ]
- 基金信息：
  
  国家重点研发计划基金资助项目(2017YFB0406301);国家大学生创新创业训练计划基金资助项目(202010487051)
- DOI：10.11959/j.issn.1000-436x.2021029
  中图分类号： TN713
- 网络出版日期：2021-04，
  
  纸质出版日期：2021-04-25
- 稿件说明：
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梁飞, 蒙顺良, 吕文中. 高带外抑制特性微波陶瓷波导滤波器的设计[J]. 通信学报, 2021,42(4):194-201.

Fei LIANG, Shunliang MENG, Wenzhong LYU. Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics[J]. Journal on communications, 2021, 42(4): 194-201.
梁飞, 蒙顺良, 吕文中. 高带外抑制特性微波陶瓷波导滤波器的设计[J]. 通信学报, 2021,42(4):194-201. DOI： 10.11959/j.issn.1000-436x.2021029.

Fei LIANG, Shunliang MENG, Wenzhong LYU. Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics[J]. Journal on communications, 2021, 42(4): 194-201. DOI： 10.11959/j.issn.1000-436x.2021029.

摘要

介绍了陶瓷波导滤波器的设计理论，采用耦合通槽分别与浅、深耦合盲孔的组合结构来满足正、负耦合带宽要求，通过调整 3～6 腔体的交叉耦合来改善滤波器传输曲线的对称性，同时实现滤波器近端和远端的带外抑制，在此基础上设计了一款5G基站用六腔陶瓷波导滤波器。在该滤波器的优化过程中，详细讨论了3～6腔体交叉耦合通槽的相对位置偏移量和交叉耦合通槽的长度对滤波器传输零点位置、近端和远端带外抑制特性的影响，并给出了相关的变化规律。经优化后滤波器性能指标如下：中心频率为3.5 GHz，工作带宽为200 MHz，插入损耗≤1.2 dB，回波损耗≥17 dB，近端带外抑制≥25 dB，远端带外抑制≥51 dB。根据仿真模型结构参数制备得到的样品，其性能测试结果与仿真结果吻合良好。

Abstract

The design theory of ceramic waveguide filter was introduced

and then the combination structure of coupling through slot with shallow or deep coupling blind hole was designed

which could meet the requirements of positive and negative coupling bandwidth.By adjusting the cross coupling between 3～6 cavities

the symmetry of the filter transmis-sion curve was improved

and the near and far end band suppression of the filter was realized.Finally

a six-cavity ce-ramic waveguide filter for 5G base station was designed.In the process of optimizing the filter

the influences of the rela-tive position offset of the cross-coupling through slot and the length of the cross-coupling through slot on the transmis-sion zero position

the near end and far end out of band suppression characteristics of the filter were discussed in detail

and the relevant change rules were given.The performance indexes of the optimized filter were as follows

center fre-quency was 3.5 GHz

working bandwidth was 200 MHz

insertion loss ≤ 1.2 dB

return loss ≥ 17 dB

near end out of band rejection ≥ 25 dB

far end out of band rejection ≥ 51 dB.According to the structural parameters of the simulation model

the performance test results of the samples are in good agreement with the simulation results.

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references

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