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Microstrip Active Filters Using GaAs FET Negative Resistance Circuits for Loss Compensation

机译:使用GaAs FET负电阻电路的微带有源滤波器,用于损耗补偿

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摘要

Design techniques are presented for high performance microstrip bandpass filters using GaAs FETs for loss compensation. The filters are based on conventional planar filter topologies with the addition of GaAs FET negative resistance circuits to amplify the signal within the resonators via a reflection-mode of amplification. Three practical filters have been demonstrated using these negative resistance techniques: (1) A filter employing an active loop configuration, (2) a dual-mode microstrip ring resonator filter, and (3) an end-coupled half-wavelength resonator filter. The investigation of this negative resistance method of toss compensation has led to the development of an exciting new type of miniaturised filter which employs MIC microstrip resonators with MMIC negative resistance chips bonded into the filter for loss compensation. This approach has' the advantage of combining the proven capabilities of established MIC microstrip filter topologies with the excellent reproducibility of the MMIC loss compensation circuits.
机译:提出了使用GaAs FET进行损耗补偿的高性能微带通滤波器的设计技术。滤波器基于常规的平面滤波器拓扑结构,并添加了GaAs FET负电阻电路,以通过反射的放大模式放大谐振器内的信号。使用这些负阻技术已证明了三种实用的滤波器:(1)采用有源环路配置的滤波器,(2)双模微带环形谐振器滤波器,以及(3)端耦合半波长谐振器滤波器。对这种抛物线的负电阻方法的研究导致了一种令人兴奋的新型微型滤波器的开发,该滤波器采用了MIC微带谐振器,其中MMIC负电阻芯片结合到滤波器中以进行损耗补偿。这种方法的优点是将成熟的MIC微带滤波器拓扑结构的可靠能力与MMIC损耗补偿电路的出色再现性相结合。

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