An ultra broadband 2-18GHz 6-bit PHEMT MMIC digital attenuator with low insertion phase shift

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 sh...

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Bibliographic Details
Main Authors: Yong-Sheng Dai, Jie Zhang, Bing-Qing Dai, Zhi-Dong Song, Gui-Xiang Qian, Shao-Bo Chen, Wen-Kan Zhou
Format: Conference Proceeding
Language:English
Subjects:
Attenuation
Attenuation measurement
Attenuators
digital variable attenuator
Logic gates
low insertion phase shift
MMIC
MMICs
PHEMTs
Switches
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Description
Summary: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: +2.31dB/-0.51dB; insertion phase shift: +6.28°/-1.53° referenced insertion loss:
ISSN:2162-6588
DOI:10.1109/ICUWB.2010.5614714