Dependence of Substrate Resistance of RF MOSFET on the Performance of LNA at 60 GHz
Operations in the 60 GHz band have many potential advantages compared to other unlicensed frequency bands including the availability of large bandwidth (7 GHz) and high-transmission power levels. In order to utilize this plentiful resource, it is necessary to study the MOSFET devices at 60 GHz for developing high efficiency low noise amplifier and oscillators. The modeling is mainly based on substrate resistance to improve the operating frequency. #960;-type substrate resistance model of RF MOSFETs are used as composite model for MOSFET. In composite model, core transistor is modeled using BSIM4 and substrate network is added to it. The functionality of this composite model is verified by comparing with that of conventional MOSFET. To study the impact of substrate network, a 60 GHz LNA is constructed. Conventional LNA is designed first and later MOSFET in that LNA are replaced with composite model and comparing performances in both the cases. Within the range of designs, the impact of #960;-type substrate resistance network on noise figure, maximum available gain, maximum stable gain, high frequency noise and stability characteristics of the LNA are significant and reported.
Keywords: BSIM4, Composite model, millimeter-wave LNA, Millimeter-wave technology, radio frequency modeling.
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ABOUT THE AUTHORS
Sari.S
Sari S received the B.Tech. degree in electronics and communication engineering from Vidya Academy of Science and Technology, Thrissur, India, in 2010. She is currently pursuing M.Tech degree in VLSI design at the Amrita Vishwa Vidyapeetham, Coimbatore, India. Her current research interests are parasitic extraction and modeling of millimeter-wave MOSFET, FET modeling and antenna design.
Karthigha Balamurugan
Karthigha Balamurugan received the BE degree from Bharathiar University, in 1998 and ME degree from Government College of Technology, Coimbatore, India, in 2008.She currently pursuing PhD. Her research interest is device modeling for millimeter-wave applications
Jayakumar M
Jayakumar M received his doctorate in Microwave Electronics in 1996 from the University of Delhi. He worked in Thapar University, Patiala from 1996 to 1997 as a lecturer in Electrical and Telecommunication Engineering department. In 1997, he joined Indian Space Research Organization (ISRO), Trivandrum in the design and development of antennas for airborne vehicles and simulation of communication links for various missions. In 2001, he joined Essel group, Mumbai in the satellite bandwidth and spectrum management group for direct broadcasting satellite services. He had attended several orbit-frequency coordination meetings in ITU, Geneva for Indian DTH services. Presently working as a professor in Amrita Vishwa Vidyapeetham since 2003 involved in teaching and research in the area of millimeter wave wireless communication systems, advanced antenna designs for air borne vehicles, cylindrical microstrip antennas etc. He was the recipient of Dr. K.S.Krishnan research fellowship from the department of Atomic Energy and IEEE student award by the IEEE Magnetic Society U.S.A. He is a member and Hon. Secretary of IETE Coimbatore Center.
Sari.S
Sari S received the B.Tech. degree in electronics and communication engineering from Vidya Academy of Science and Technology, Thrissur, India, in 2010. She is currently pursuing M.Tech degree in VLSI design at the Amrita Vishwa Vidyapeetham, Coimbatore, India. Her current research interests are parasitic extraction and modeling of millimeter-wave MOSFET, FET modeling and antenna design.
Karthigha Balamurugan
Karthigha Balamurugan received the BE degree from Bharathiar University, in 1998 and ME degree from Government College of Technology, Coimbatore, India, in 2008.She currently pursuing PhD. Her research interest is device modeling for millimeter-wave applications
Jayakumar M
Jayakumar M received his doctorate in Microwave Electronics in 1996 from the University of Delhi. He worked in Thapar University, Patiala from 1996 to 1997 as a lecturer in Electrical and Telecommunication Engineering department. In 1997, he joined Indian Space Research Organization (ISRO), Trivandrum in the design and development of antennas for airborne vehicles and simulation of communication links for various missions. In 2001, he joined Essel group, Mumbai in the satellite bandwidth and spectrum management group for direct broadcasting satellite services. He had attended several orbit-frequency coordination meetings in ITU, Geneva for Indian DTH services. Presently working as a professor in Amrita Vishwa Vidyapeetham since 2003 involved in teaching and research in the area of millimeter wave wireless communication systems, advanced antenna designs for air borne vehicles, cylindrical microstrip antennas etc. He was the recipient of Dr. K.S.Krishnan research fellowship from the department of Atomic Energy and IEEE student award by the IEEE Magnetic Society U.S.A. He is a member and Hon. Secretary of IETE Coimbatore Center.
