使用有源器件的宽带可调谐组合滤波器

IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI:10.1109/WESCAN.1993.270574

I. Lockerbie, S. Kumar

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引用次数: 7

摘要

利用变容管调谐组合微带结构可以实现具有快速调谐速度的电子可调谐微波滤波器。即使采用砷化镓变容管，谐振器Q也受到变容管损耗的限制，滤波器带宽必须大于8-10%。作者提出了解决这个问题的方法。通过在调谐电路中耦合一个负电阻来补偿变容管的损耗。这个电阻是用有源器件实现的。给出了一个带宽为3%的滤波器的计算机仿真结果。给出了有负阻和无负阻的性能结果，以提出由于负阻而产生的改进。

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A broadband tunable combline filter using active devices

Electronically tunable microwave filters with fast tuning speed can be realized using varactor tuned combline microstrip structures. Even when GaAs varactors are employed, the resonator Q is limited by the varactor losses and the filter bandwidth has to be more than 8-10%. The authors present a solution to the problem. The varactor losses are compensated by coupling a negative resistor in the tuned circuit. This resistor is realized using an active device. Computer simulation results for a filter with 3% bandwidth are presented. Performance results with and without the negative resistance are presented to bring out improvement due to negative resistance.<>

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IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings

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