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An ultra-wideband (2-18GHz) 6-bit MMIC digital attenuator has been designed. The attenuator has been fabricated with 0.5μm GaAs PHEMT process. Low insertion phase shift has been achieved over the main attenuation states. On-wafer measurement results of the developed MMIC chips in the 2-18GHz band show that the 6-bit MMIC digital attenuator has 31.5dB dynamic range stepped by 0.5dB; attenuation accuracy:...
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