Design and Analysis of 1.5 GHz LNA with Sufficient Gain and Noise Performance

This paper aims to provide a deep insight into design and analysis of Hybrid Microwave Integrated Circuit of a low noise amplifier (LNA), functioning at 1.5 GHz with an operational bandwidth of 90 MHz (1.48 GHz to 1.57 GHz), suitable for very narrowband (5.9 % fractional bandwidth) application. The designed prototype has been printed on FR-4 board and assembled with Surface Mount Devices; with “ATF-21170” as an amplifying candidate. The proposed LNA has minimum gain of 13.08 dB and maximum noise figure of 1.95 dB. It is unconditionally stable in the operational band. Moreover, this LNA offers a very good non-linear characteristic; Output third order intercept point (OIP3) nearly 17.5 dBm. It also gives a 26.9 dB isolation between output and input port.