Dual-Band Bandpass Filter With Controllable Stopband Bandwidth
A novel dual-band bandpass filter (BPF) is proposed with independently controllable transmission zeros (TZs) which can realize widely tunable stopband bandwidth (BW). The planar microstrip filter consists of a three-degree L-C ladder lowpass filter loaded with two unsymmetrical shorted stubs which a...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-01-01
|
| Series: | Frontiers in Physics |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2021.809752/full |
| _version_ | 1818732982897213440 |
|---|---|
| author | Nan Wang Haokun Wei Kun Gao Xiting Ruan Xiaojian Chen Qian Xu Qian Yang Anxue Zhang Shuangyang Liu |
| author_facet | Nan Wang Haokun Wei Kun Gao Xiting Ruan Xiaojian Chen Qian Xu Qian Yang Anxue Zhang Shuangyang Liu |
| author_sort | Nan Wang |
| collection | DOAJ |
| description | A novel dual-band bandpass filter (BPF) is proposed with independently controllable transmission zeros (TZs) which can realize widely tunable stopband bandwidth (BW). The planar microstrip filter consists of a three-degree L-C ladder lowpass filter loaded with two unsymmetrical shorted stubs which are used to produce different TZs. By tuning the parameters of the two unsymmetrical shorted stubs, the TZs can be independently controlled. Therefore, the BPF has independent controllable center frequencies (CFs), passband bandwidths, and stopband bandwidths between adjacent passbands. All the L-C values in the equivalent circuit of the proposed filter are optimized to fulfill the design specifications. For demonstration, a dual-band BPF is designed. The measured results show good agreement with the simulated ones. |
| first_indexed | 2024-12-17T23:42:14Z |
| format | Article |
| id | doaj.art-2c52c4babb7a451ba7b9c0176ff07dbe |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-17T23:42:14Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-2c52c4babb7a451ba7b9c0176ff07dbe2022-12-21T21:28:24ZengFrontiers Media S.A.Frontiers in Physics2296-424X2022-01-01910.3389/fphy.2021.809752809752Dual-Band Bandpass Filter With Controllable Stopband BandwidthNan Wang0Haokun Wei1Kun Gao2Xiting Ruan3Xiaojian Chen4Qian Xu5Qian Yang6Anxue Zhang7Shuangyang Liu8State Grid Shaanxi Electric Power Research Institute, Xi’an, ChinaState Grid Shaanxi Electric Power Research Institute, Xi’an, ChinaState Grid Xi’an Electric Power Corporation, Xi’an, ChinaState Grid Xi’an Electric Power Corporation, Xi’an, ChinaState Grid Shaanxi Maintenance Company, Xi’an, ChinaState Grid Weinan Electric Power Corporation, Shangluo, ChinaSchool of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, ChinaSchool of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, ChinaSchool of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, ChinaA novel dual-band bandpass filter (BPF) is proposed with independently controllable transmission zeros (TZs) which can realize widely tunable stopband bandwidth (BW). The planar microstrip filter consists of a three-degree L-C ladder lowpass filter loaded with two unsymmetrical shorted stubs which are used to produce different TZs. By tuning the parameters of the two unsymmetrical shorted stubs, the TZs can be independently controlled. Therefore, the BPF has independent controllable center frequencies (CFs), passband bandwidths, and stopband bandwidths between adjacent passbands. All the L-C values in the equivalent circuit of the proposed filter are optimized to fulfill the design specifications. For demonstration, a dual-band BPF is designed. The measured results show good agreement with the simulated ones.https://www.frontiersin.org/articles/10.3389/fphy.2021.809752/fullbandpass filterdual-bandtunable stopbandwide upper stopbandtransmission zerostransmission poles |
| spellingShingle | Nan Wang Haokun Wei Kun Gao Xiting Ruan Xiaojian Chen Qian Xu Qian Yang Anxue Zhang Shuangyang Liu Dual-Band Bandpass Filter With Controllable Stopband Bandwidth Frontiers in Physics bandpass filter dual-band tunable stopband wide upper stopband transmission zeros transmission poles |
| title | Dual-Band Bandpass Filter With Controllable Stopband Bandwidth |
| title_full | Dual-Band Bandpass Filter With Controllable Stopband Bandwidth |
| title_fullStr | Dual-Band Bandpass Filter With Controllable Stopband Bandwidth |
| title_full_unstemmed | Dual-Band Bandpass Filter With Controllable Stopband Bandwidth |
| title_short | Dual-Band Bandpass Filter With Controllable Stopband Bandwidth |
| title_sort | dual band bandpass filter with controllable stopband bandwidth |
| topic | bandpass filter dual-band tunable stopband wide upper stopband transmission zeros transmission poles |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2021.809752/full |
| work_keys_str_mv | AT nanwang dualbandbandpassfilterwithcontrollablestopbandbandwidth AT haokunwei dualbandbandpassfilterwithcontrollablestopbandbandwidth AT kungao dualbandbandpassfilterwithcontrollablestopbandbandwidth AT xitingruan dualbandbandpassfilterwithcontrollablestopbandbandwidth AT xiaojianchen dualbandbandpassfilterwithcontrollablestopbandbandwidth AT qianxu dualbandbandpassfilterwithcontrollablestopbandbandwidth AT qianyang dualbandbandpassfilterwithcontrollablestopbandbandwidth AT anxuezhang dualbandbandpassfilterwithcontrollablestopbandbandwidth AT shuangyangliu dualbandbandpassfilterwithcontrollablestopbandbandwidth |