Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics
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 c...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2021-04-01
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| Series: | Tongxin xuebao |
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| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021029/ |
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| _version_ | 1841539301458837504 |
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| author | Fei LIANG Shunliang MENG Wenzhong LYU |
| author_facet | Fei LIANG Shunliang MENG Wenzhong LYU |
| author_sort | Fei LIANG |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-b182b799b5794418a7fbf9973e4e508f |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2021-04-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-b182b799b5794418a7fbf9973e4e508f2025-01-14T07:22:03ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2021-04-014219420159741691Design of microwave ceramic waveguide filter with high out-of-band suppression characteristicsFei LIANGShunliang MENGWenzhong LYUThe 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.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021029/ceramic waveguide filternegative coupling structurecross-coupling through slotout-of-band suppression |
| spellingShingle | Fei LIANG Shunliang MENG Wenzhong LYU Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics Tongxin xuebao ceramic waveguide filter negative coupling structure cross-coupling through slot out-of-band suppression |
| title | Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics |
| title_full | Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics |
| title_fullStr | Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics |
| title_full_unstemmed | Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics |
| title_short | Design of microwave ceramic waveguide filter with high out-of-band suppression characteristics |
| title_sort | design of microwave ceramic waveguide filter with high out of band suppression characteristics |
| topic | ceramic waveguide filter negative coupling structure cross-coupling through slot out-of-band suppression |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021029/ |
| work_keys_str_mv | AT feiliang designofmicrowaveceramicwaveguidefilterwithhighoutofbandsuppressioncharacteristics AT shunliangmeng designofmicrowaveceramicwaveguidefilterwithhighoutofbandsuppressioncharacteristics AT wenzhonglyu designofmicrowaveceramicwaveguidefilterwithhighoutofbandsuppressioncharacteristics |