Title :
An ultra broadband 2–18GHz 6-bit PHEMT MMIC digital attenuator with low insertion phase shift
Author :
Dai, Yong-sheng ; Zhang, Jie ; Dai, Bing-Qing ; Song, Zhi-Dong ; Qian, Gui-Xiang ; Chen, Shao-Bo ; Zhou, Wen-Kan
Author_Institution :
Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
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: <;-5.71dB; input/output VSWR: <;2.32; chip size: 2.89mm×1.22mm×0.1mm.
Keywords :
MMIC phase shifters; attenuators; gallium arsenide; ultra wideband technology; PHEMT MMIC digital attenuator; frequency 2 GHz to 18 GHz; low insertion phase shift; on-wafer measurement; size 0.5 mum; ultra broadband; Attenuation; Attenuation measurement; Attenuators; Logic gates; MMICs; PHEMTs; Switches; MMIC; digital variable attenuator; low insertion phase shift;
Conference_Titel :
Ultra-Wideband (ICUWB), 2010 IEEE International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-5305-4
Electronic_ISBN :
978-1-4244-5306-1
DOI :
10.1109/ICUWB.2010.5614714
