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http://dx.doi.org/10.5515/JKIEES.2009.9.4.218

A CPW-Based 77 GHz Power Amplifier with Cascode Structure Using a 130 nm In0.88GaP/In0.4AlAs/In0.4GaAs mHEMTs  

Kim, Young-Min (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Koh, Yu-Min (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Park, Young-Rak (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Lee, Si-Young (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Seo, Kwang-Seok (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Kwon, Young-Woo (Institute of New Media and Communications, School of Electrical Engineering, Seoul National University)
Publication Information
Journal of electromagnetic engineering and science / v.9, no.4, 2009 , pp. 218-222 More about this Journal
Abstract
In this paper, we present a CPW-based 77 GHz 3-stage power amplifier MMIC for automotive radar systems. The power amplifier MMIC has been realized using a 130 nm $In_{0.88}$GaP/$In_{0.4}$AlAs/$In_{0.4}$GaAs metamorphic high-electron mobility transistors(mHEMTs) technology and an output stage with a cascode configuration. This produced a good output power and gain performance at 77 GHz. The fabricated power amplifier MMIC exhibited a small-signal gain of 18 dB, an output power of 17 dBm and 9 % power added efficiency(PAE) at 77 GHz with a total gate width of 800 ${\mu}m$ in the output stage. These performances could be useful to low-cost and small-sized components for 77 GHz automotive radar systems.
Keywords
Millimeter Wave; Automotive Radar; Cascode; mHEMT; MMIC; Power Amplifier; Coplanar Wave Guide;
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