Novel tunable dual‐band filter using evanescent‐mode cavity resonators
In this paper, a dual‐band filter with highly selective channels and independently tunable channels using evanescent‐mode cavity (EVA) is proposed. It consists of four EVA resonators, each of which is topped by a piezoelectric actuator, which is tuned with frequency. Four sets of varactors between t...
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| Veröffentlicht in: | Microwave and optical technology letters 2022-06, Vol.64 (6), p.1017-1022 |
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| container_title | Microwave and optical technology letters |
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| creator | Lai, Junchen Yang, Tao Chi, Pei‐Ling Xu, Ruimin Yan, Bo |
| description | In this paper, a dual‐band filter with highly selective channels and independently tunable channels using evanescent‐mode cavity (EVA) is proposed. It consists of four EVA resonators, each of which is topped by a piezoelectric actuator, which is tuned with frequency. Four sets of varactors between two adjacent resonators are used to tune interstage coupling while four sets of varactors are used between ports and resonators for control of the external coupling. By governing resonant frequencies of the EVA resonators and coupling coefficients between adjacent resonators, the independent center frequency tuning ranges of the lower passband and higher passband of the dual‐filter are 2.05–2.55 and 2.35–2.75 GHz, respectively. Simulation and measurement results maintain the good agreement. |
| doi_str_mv | 10.1002/mop.33235 |
| format | Article |
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It consists of four EVA resonators, each of which is topped by a piezoelectric actuator, which is tuned with frequency. Four sets of varactors between two adjacent resonators are used to tune interstage coupling while four sets of varactors are used between ports and resonators for control of the external coupling. By governing resonant frequencies of the EVA resonators and coupling coefficients between adjacent resonators, the independent center frequency tuning ranges of the lower passband and higher passband of the dual‐filter are 2.05–2.55 and 2.35–2.75 GHz, respectively. 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| subjects | bandpass filter Cavity resonators Channels Coupling coefficients dual‐band evanescent‐mode cavity independent center frequency tuning Piezoelectric actuators Resonant frequencies Varactor diodes |
| title | Novel tunable dual‐band filter using evanescent‐mode cavity resonators |
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