Wideband UHF/Microwave Active Isolators

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  • Author: Jiri Polivka
Ferrite isolators are common design components in many RF and microwave systems. They ensure good matching between mismatched components, often covering octave frequency bands. However, at UHF and for extremely wide bandwidths, ferrite devices are not available. An active isolator can solve the problem, utilizing a wideband MMIC amplifier and one or two attenuators to reduce its gain while offering a high reverse isola-tion and good impedance match over a wide band.