论文信息 - High-Speed, Varactor-Tunable Microwave Filter Element

High-Speed, Varactor-Tunable Microwave Filter Element

A varactor-tunable filter element at I-band frequencies is described in which the negative resistance of a GaAs FET is used to overcome varactor losses and attain a high unloaded Q over a 500-MHz frequency band.

A. Presser

[1] B. M. Schiffman,et al. Tunable Passive Multicouplers Employing Minimum-Loss Filters , 1959 .

[2] D. K. Adams,et al. Active Filters for UHF and Microwave Frequencies , 1969 .

[3] Seymour B. Cohn,et al. Dissipation Loss in Multiple-Coupled-Resonator Filters , 1959, Proceedings of the IRE.