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Reactel part number 4R9-2000-X4S11 is an ultra-narrowband notch filter which utilizes a unique design to achieve a percent bandwidth of less than 0.8%. Attenuation at the center of the notch approaches 90 dB while insertion loss in the passband is less than 0.75 dB.
We are extremely proficient at satisfying your most stringent filter needs. Please contact the factory with your unique specifications so that we may design a unit which will fit your requirements.
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