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Octave-tunable constant absolute bandwidth bandstop filter utilizing a novel passively-compensated coupling method

机译:利用新型无源补偿耦合方法的八度可调恒定绝对带宽带阻滤波器

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A new passively-compensated coupling structure, compatible with evanescent-mode cavity resonators and capable of producing constant absolute bandwidth over wide tuning ranges, is presented for the first time. It is used to realize a constant absolute bandwidth 2.0 to 4.2 GHz tunable bandstop filter which utilizes evanescent-mode cavity resonators. The filter has high levels of stopband rejection (> 50 dB) across its entire tuning range, and has a 54.5 ± 6.5 MHz 3-dB fractional bandwidth. When compared to the coupling method traditionally used for evanescent-mode resonators, the proposed method reduces the bandwidth variation of this filter from 295% (21 to 83 MHz) to 27% (48 to 61 MHz).
机译:首次提出了一种新的无源补偿耦合结构,该结构与e逝模腔谐振器兼容,并能够在较宽的调谐范围内产生恒定的绝对带宽。它用于实现一个恒定的,带宽为2.0至4.2 GHz的可调带阻滤波器,该滤波器利用e逝模式腔谐振器。该滤波器在整个调谐范围内具有很高的阻带抑制能力(> 50 dB),并具有5​​4.5±6.5 MHz的3-dB分数带宽。当与传统上用于van逝模式谐振器的耦合方法相比时,所提出的方法将该滤波器的带宽变化从295%(21至83 MHz)降低到27%(48至61 MHz)。

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