| 摘要 |
A variable Q reflection mode filter having a three port circulator device one port of which is terminated by a one-port filter. The filter increases the overall 3dB resonance point of the filter to reduce the uploaded Q factors required for particular applitcations. The filter may be arranged to provide a maximally flat response or a quasi equiripple response. Transmission zeros may be incorporated, to further enhance the effective unloaded Q.
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