A High Linearity Wide Bandwidth GSM/WCDMA/LTE Base Station LNA MMIC with Ultra Low Noise Figure

This paper presents a high linearity wide bandwidth low noise amplifier (LNA) MMIC with excellent noise figure. The amplifier topology is compromised of a single-stage cascode topology with inductive source degeneration of common-source device. This amplifier topology seems an attractive choice for applications requiring wide bandwidth, high gain, and high linearity. The design targets 700-900 MHz, 1700-2200 MHz, and 2500-2800 MHz frequency bands for GSM/WCDMA/LTE base station receiver applications. A single-stage amplifier is implemented in a high performance 0.25um InGaAs E/D-mode pHEMT technology and demonstrates a high gain and an excellent bandwidth along with a high-linearity. Additionally, an excellent noise performance is achieved demonstrating <; 0 .6 dB noise figure in 700-900 MHz frequency band while exhibiting <; 0.75 dB noise figure in 1700-2200 MHz frequency band. A single-stage amplifier provides 20 dB of small-signal gain with excellent linearity of output OIP3 ≥ +32.0 dBm while requiring only 45 mA from a +5V supply.