Low Noise Amplifier Design Methodology Summary

Low Noise Amplifiers (LNAs) amplify weak signals received by the antenna in communication systems. Every wireless system module typically consists of one or several LNAs. Applications include GPS receivers, wireless data systems, satellite communication, cellular handsets, radio systems, etc. The low noise in the receive chain is reduced by the gain of the LNA and therefore its function is primarily to amplify the incident signal power while adding minimum noise and distortion to the signal. The lower the noise figure (NF) of the LNA, the more the reception of the received signal is improved. Skyworks’ MMIC product portfolio incorporates sub-dB NF, high linearity LNAs which are compact, highly efficient and include great performance from enhancement mode (E-mode) pHEMT amplifiers. This article highlights the designing methodology of an LNA by focusing on their product realization process. Development of LNA from process selection to modeling techniques has been covered.