Design and Simulation of X Band LNA for Aircraft Receiver

Subject Areas : journal of Artificial Intelligence in Electrical Engineering

mehdi Samadi ¹ , ali rostami ² , ali sahafi ³

1 - Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tabriz, Iran,
2 - University of Tabriz, Faculty of Electrical and Computer Engineering, Tabriz, Iran
3 - University of Tabriz, Faculty of Electrical and Computer Engineering, Tabriz, Iran

Received: 2017-07-07 Accepted : 2017-08-30 Published : 2017-11-01

Keywords: KEYWORDS: Low noise amplifier, Common gate LNA, gm-boosted,

Abstract :

This paper proposes a highly linear low noise amplifier (LNA) for ultra-wideband applications. It focuses on linearization of the basic active gm-boosted common gate (CG) LNA circuit by exploring the non-linearity coefficients using the generalized nonlinearity model. Mathematical analysis shows that in active gm-boosted CG LNA, the third input intercept point (IIP3) of LNA depends on interaction between main and auxiliary amplifiers. Post-layout simulation results of the proposed LNA circuit in a 180 nm RF CMOS process show 5.19 dBm of IIP3 that indicates 4 dB improvement comparing with conventional structures. The proposed wideband LNA has a voltage gain of 18 dB, 4dB bandwidth from 8 GHz to 12 GHz, and minimum noise figure (NF) of 3.6 dB. The simulated S11 is better than -14 dB in whole frequency range while the LNA core draws 3 mA from a single 1.8 V DC voltage supply.