Low Noise and High Linearity GaAs LNA MMIC with Novel Active Bias Circuit for LTE Applications

• Published in: Journal of Information and Communication Convergence Engineering, 15(2) Vol. 15; no. 2; pp. 112 - 116
• Main Authors: Keun-Kwan Ryu, Yong-Hwan Kim, Sung-Chan Kim
• Format: Journal Article
• Language: English
• Published: 한국정보통신학회JICCE 01.06.2017; 한국정보통신학회
• Subjects: 전자/정보통신공학; Active bias circuit; GaAs; PHEMT; MMIC; Low noise amplifier
• ISSN: 2234-8255; 2234-8883
• DOI: 10.6109/jicce.2017.15.2.112

In this work, we demonstrated a low noise and high linearity low noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) with novel active bias circuit for LTE applications. The device technology used in this work relies on a process involving a 0.25-μm GaAs pseudomorphic high electron mobility transistor (PHEMT). The LNA MMIC with a novel active bias circuit has a small signal gain of 19.7±1.5 dB and output third order intercept point (OIP3) of 38–39 dBm in the frequency range 1.75–2.65 GHz. The noise figure (NF) is less than 0.58 dB over the full bandwidth. Compared with the characteristics of the LNA MMIC without using the novel active bias circuit, the OIP3 is improved about 2–3 dBm. The small signal gain and NF showed no significant change after using the active bias circuit. The novel active bias circuit indeed improves the linearity performance of the LNA MMIC without degradation. KCI Citation Count: 0